weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

Excessive Heat Warning


URGENT - WEATHER MESSAGE
National Weather Service Sacramento CA
1259 AM PDT Thu Jul 4 2024

CAZ013-015>019-063-066-067-042300-
/O.CON.KSTO.EH.W.0003.000000T0000Z-240710T0600Z/
Shasta Lake Area / Northern Shasta County-Northern Sacramento
Valley-Central Sacramento Valley-Southern Sacramento Valley-
Carquinez Strait and Delta-Northern San Joaquin Valley-Mountains
Southwestern Shasta County to Western Colusa County-Northeast
Foothills/Sacramento Valley-Motherlode-
Including the cities of Fairfield/Suisun, Modesto, Jackson,
Oroville, Shasta Dam, Marysville/Yuba City, Sacramento, Red
Bluff, Alder Springs, Stockton, Grass Valley, Redding, Chico, and
Paradise
1259 AM PDT Thu Jul 4 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 11 PM PDT
TUESDAY...

* WHAT...Dangerously hot conditions with high temperatures from 105
  to 118. Limited overnight relief with low temperatures in the
  upper 60s to mid 80s. Widespread Major to Extreme HeatRisk is
  expected.

* WHERE...Carquinez Strait and Delta, Sacramento Valley, Northern
  San Joaquin Valley, Motherlode, Mountains Southwestern Shasta
  County to Western Colusa County, Northeast Foothills, and Shasta
  Lake Area / Northern Shasta County.

* WHEN...Until 11 PM PDT Tuesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat events, particularly for those working or
  participating in outdoor activities.

* ADDITIONAL DETAILS...Heat could significantly impact outdoor
  holiday activities. Area waterways will continue to run cold and
  fast, creating dangerous conditions for those seeking relief in
  rivers and lakes. Delta breeze influence will result in slightly
  cooler, but still hot temperatures in the Vicinity Delta and
  western portions of the Sacramento Area by late weekend into early
  next week.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

Stay cool, stay hydrated, stay informed.

Monitor the latest forecasts and warnings for updates.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1119 PM PDT Wed Jul 3 2024

CAZ088-342-348-351-352-356>358-369>375-380-041830-
/O.CON.KLOX.EH.W.0003.000000T0000Z-240709T0100Z/
Santa Clarita Valley-Santa Lucia Mountains-Santa Ynez Valley-
Santa Ynez Mountains Western Range-Santa Ynez Mountains Eastern
Range-Lake Casitas-Ojai Valley-Central Ventura County Valleys-
Western Santa Monica Mountains Recreational Area-Eastern Santa
Monica Mountains Recreational Area-Calabasas and Agoura Hills-
Western San Fernando Valley-Eastern San Fernando Valley-
Southeastern Ventura County Valleys-Santa Susana Mountains-
Eastern San Gabriel Mountains-
Including the cities of Meiners Oaks, Santa Ynez, Burbank, Hearst
Castle, Westlake Village, La Canada Flintridge, Santa Paula,
Newhall, Chatsworth, Lake Castaic, Santa Clarita, Sunland, Malibu
Lake, Piru, Solvang, Northridge, Valencia, Mount Baldy, Simi
Valley, Lake Cachuma, Universal City, Topanga, Oak View, Mount
Wilson, Ojai, Glendale, Thousand Oaks, Woodland Hills, Van Nuys,
Irish Hills, Los Olivos, Fillmore, Moorpark, Wrightwood, The
Angeles Crest Highway, Newbury Park, Malibu Bowl, Oat Mountain,
Montecito Hills, and San Marcos Pass
1119 PM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 6 PM PDT MONDAY...

* WHAT...Dangerously hot conditions with temperatures up to 95 to
  105 possible, and upwards of 105 to 110 possible in the valleys
  well away from the coast.

* WHERE...A portion of southwest California.

* WHEN...Until 6 PM PDT Monday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat events.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

Stay cool, stay hydrated, stay informed.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
1119 PM PDT Wed Jul 3 2024

CAZ038-343>345-353-376>379-381>383-041830-
/O.CON.KLOX.EH.W.0003.000000T0000Z-240711T0100Z/
Cuyama Valley-Southern Salinas Valley-San Luis Obispo County
Interior Valleys-San Luis Obispo County Mountains-Santa Barbara
County Interior Mountains-Southern Ventura County Mountains-
Northern Ventura County Mountains-Interstate 5 Corridor-Western
San Gabriel Mountains and Highway 14 Corridor-Western Antelope
Valley Foothills-Eastern Antelope Valley Foothills-Antelope
Valley-
Including the cities of Gorman, Lake Los Angeles, Creston,
Caliente Range, Pyramid Lake, Palmdale, Mount Pinos, Atascadero,
Lake Nacimiento, Llano, San Miguel, Tejon Pass, Lake Palmdale, La
Panza Range, Ozena, Lancaster, Figueroa Mountain, Elizabeth Lake,
San Rafael Mountain, Lockwood Valley, Big Pine Mountain,
Matilija, Templeton, Rose Valley, New Cuyama, Acton, Valyermo,
Shandon, Mill Creek, Carrizo Plain, Santa Margarita Lake,
Topatopa Mountains, Warm Springs, Pearblossom, and Paso Robles
1119 PM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 6 PM PDT
WEDNESDAY...

* WHAT...Dangerously hot conditions with temperatures up to 100 to
  110 expected, and upwards of 105 to 115 expected over interior
  valleys and foothills including the Antelope Valley.

* WHERE...A portion of southwest California.

* WHEN...Until 6 PM PDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat events.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

Stay cool, stay hydrated, stay informed.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
827 PM PDT Wed Jul 3 2024

CAZ300>322-324-332-334-336-338-041200-
/O.CON.KHNX.EH.W.0002.000000T0000Z-240711T1500Z/
West Side Mountains north of 198-Los Banos - Dos Palos-Merced -
Madera - Mendota-Planada - Le Grand - Snelling-Coalinga - Avenal-
West Side of Fresno and Kings Counties-Caruthers - San Joaquin -
Selma-Fresno-Clovis-West Side Mountains South of 198-Buttonwillow
- Lost Hills - I5-Delano-Wasco-Shafter-Hanford - Corcoran -
Lemoore-Visalia - Porterville - Reedley-Buena Vista-Bakersfield-
Southeast San Joaquin Valley-South End San Joaquin Valley-
Mariposa Madera Foothills-Mariposa-Madera Lower Sierra-Fresno-
Tulare Foothills-Fresno-Tulare Lower Sierra-South End Sierra
Foothills-South End of the Lower Sierra-Yosemite Valley-Kern
River Valley-Tehachapi-Frazier Mountain Communities-Mojave Desert
Slopes-
Including the cities of Delano, Alpaugh, Parlier, Lost Hills,
North Fork, Millerton Lake, Fish Camp, McKittrick, Lemoore
Station, Merced, Lake Isabella, Hanford, Lamont, Corcoran,
Richgrove, Arvin, Auberry, Kerman, Visalia, Fresno, Mariposa,
Taft, Yosemite Valley, Camp Nelson, Madera, Sanger, Coarsegold,
Planada, Mojave, Shafter, Bass Lake, Five Points, Atwater, Lake
Mcclure, Kernville, Buttonwillow, Kettleman City, San Luis
Reservoir, Los Banos, Tehachapi, Frazier Park, Bakersfield,
Lemoore, Le Grand, El Portal, Avenal, Tulare, Blackwells Corner,
Wasco, Goshen, Porterville, Oakhurst, Kingsburg, Coalinga, and
Selma
827 PM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THURSDAY,
JULY 11...

* WHAT...Dangerously hot conditions with a 50 to 90% Probability of
  high temperatures 107F or hotter. There is a 50% Probability of
  minimum temperatures of 73F or warmer. Extreme heat risk will
  occur through the duration of this heat wave.

* WHERE...A portion of central California.

* WHEN...Until 8 AM PDT Thursday, July 11.

* IMPACTS...This level of rare, long-duration extreme heat with
  little to no overnight relief affects everyone, especially those
  without effective cooling and/or adequate hydration.

* ADDITIONAL DETAILS...Impacts likely in most health systems,
  heat-sensitive industries and infrastructure.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

Stay cool, stay hydrated, stay informed.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
756 PM PDT Wed Jul 3 2024

CAZ110-111-041500-
/O.CON.KEKA.EH.W.0001.000000T0000Z-240707T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Including Potter Valley, Legget, Covelo, Willits, and Laytonville
756 PM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
SATURDAY...

* WHAT...Major to localized extreme HeatRisk with highs up to 105
  and limited overnight relief with lows near 65.

* WHERE...Northern Mendocino Interior.

* WHEN...Until 8 PM PDT Saturday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat. This level of heat will affect anyone without
  effective cooling or adequate hydration.

* ADDITIONAL DETAILS...Heat could significantly impact outdoor
  holiday activities. Hot weather will begin on Tuesday with near
  record breaking temperatures through the week.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
756 PM PDT Wed Jul 3 2024

CAZ113>115-041500-
/O.CON.KEKA.EH.W.0001.000000T0000Z-240707T0300Z/
Southeastern Mendocino Interior-Northern Lake-Southern Lake-
Including Lakeport, Hidden Valley Lake, Talmage, Ukiah, Hopland,
Gravelly Valley Airport, Finley, Clearlake Park, Redwood Valley,
Clearlake, Calpella, and Middletown
756 PM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
SATURDAY...

* WHAT...Major to localized extreme HeatRisk with highs up to 110
  and limited overnight relief with lows near 70.

* WHERE...Lake County, and Southeastern Mendocino Interior.

* WHEN...Until 8 PM PDT Saturday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat. This level of heat will affect anyone without
  effective cooling or adequate hydration.

* ADDITIONAL DETAILS...Heat could significantly impact outdoor
  holiday activities. Hot weather will continue near record breaking
  temperatures through the week.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
1226 PM PDT Wed Jul 3 2024

CAZ502>504-506-510-512>518-041300-
/O.EXT.KMTR.EH.W.0001.000000T0000Z-240711T0600Z/
Marin Coastal Range-Sonoma Coastal Range-
North Bay Interior Mountains-North Bay Interior Valleys-
East Bay Interior Valleys-Santa Cruz Mountains-
Santa Clara Valley...including San Jose-Eastern Santa Clara Hills-
East Bay Hills-
Southern Salinas Valley...Arroyo Seco...and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains of San Benito and Interior Monterey County including
Pinnacles National Park-
1226 PM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 11 PM PDT
WEDNESDAY...

* WHAT...Dangerously hot conditions with temperatures in the
  upper 90`s to 115F expected. Limited overnight relief with low
  temperatures in the mid 60s to low 80s. Resultant widespread
  Major HeatRisk, with areas of Extreme HeatRisk.

* WHERE...Marin Coastal Range, Sonoma Coastal Range, North Bay
  Interior Mountains, North Bay Interior Valleys, East Bay
  Interior Valleys, Santa Cruz Mountains, Santa Clara Valley,
  Eastern Santa Clara Hills, East Bay Hills, Southern Salinas
  Valley, Santa Lucia Mountains and Los Padres National Forest,
  and Mountains of San Benito and Interior Monterey.

* WHEN...Until 11 PM PDT Wednesday.

* IMPACTS...Most individuals will be at risk for heat-related
  illnesses without effective cooling or adequate hydration,
  especially with prolonged outdoor exposure. Without effective
  cooling and/or adequate hydration, heat-related illnesses
  including heat stroke will be a risk to everyone. Overnight
  lows will warm as well leading to poor relief from the heat
  specifically in elevated terrain and interior areas.

* ADDITIONAL DETAILS...An exceptionally dangerous situation is
  expected to unfold during this potentially historic and deadly
  heat event. Several days of temperatures well above normal
  will lead to compounding effects among people and
  infrastructure, with the possibility of numerous heat related
  fatalities. It cannot be stressed enough that while one day at
  these temperatures may be manageable for some, an event of
  this scale, magnitude, and longevity will likely rival
  anything we`ve seen in the last 18 years. Heat is the number
  one weather related killer in the United States. By this
  weekend, it is VERY LIKELY that we add to that statistic if
  preparations are not taken seriously.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay cool, stay out of the sun, and check
up on relatives and neighbors.

Beat the heat and check the backseat! Do not leave young children
and pets in unattended vehicles. Car interiors will reach lethal
temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to the early
morning or evening. Take action when you see symptoms of heat
exhaustion and/or heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency! Call 9 1 1.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
814 AM PDT Wed Jul 3 2024

NVZ001-003>005-042100-
/O.CON.KREV.EH.W.0001.240706T1700Z-240710T1700Z/
Western Nevada Basin and Range including Pyramid Lake-Mineral and
Southern Lyon Counties-Northern Washoe County-Greater Reno-Carson
City-Minden Area-
Including the cities of Mina, Smith Valley, Gardnerville, Schurz,
Lovelock, Fallon, Nixon, Verdi, Gerlach, Virginia City,
Yerington, Hawthorne, Empire, Imlay, Sparks, Silver Springs, and
Fernley
814 AM PDT Wed Jul 3 2024

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM SATURDAY TO
10 AM PDT WEDNESDAY...

* WHAT...Temperatures are going to warm significantly as we head
  into the 4th of July weekend with afternoon highs approaching 100
  degrees across western NV on the 4th of July, then heating further
  to near or above 105 degrees over the weekend and early next week.
  This will result in a prolonged period of Major HeatRisk.

* WHERE...Northern Washoe County, Western Nevada Basin and Range
  including Pyramid Lake, Greater Reno-Carson City-Minden Area, and
  Mineral and Southern Lyon Counties.

* WHEN...From 10 AM Saturday to 10 AM PDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat events, particularly for those working or
  participating in outdoor activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

To reduce risk during outdoor work, schedule frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

&&

$$


Gale Warning


Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
314 AM PDT Thu Jul 4 2024

California waters-
Inner waters from  60 nm to 150 nm offshore.
Outer waters from 150 nm to 250 nm offshore.

Seas given as significant wave height, which is the average
height of the highest 1/3 of the waves. Individual waves may be
more than twice the significant wave height.

The National Weather Service is accepting public comments until
July 29 2024 on a proposal to replace feet with meters when
describing seas in a variety of National Marine Center text
and graphical products for the Offshore and High Seas Areas
only. To learn more please visit the following URL:
https://ocean.weather.gov/proposed-meters.php

PZZ820-042215-
Point St. George to Point Arena between 60 NM and 150 NM
offshore-
314 AM PDT Thu Jul 4 2024

...GALE WARNING...

.TODAY...N winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
8 to 14 ft.
.TONIGHT...N to NE winds 15 to 25 kt. Seas 6 to 10 ft.
.FRI...NE winds 10 to 20 kt, becoming N to NE 5 to 15 kt. Seas
6 to 9 ft.
.FRI NIGHT...N to NW winds 5 to 15 kt. Seas 5 to 7 ft.
.SAT...N to NW winds 10 to 15 kt. Seas 5 to 8 ft.
.SAT NIGHT...N to NW winds 10 to 15 kt. Seas 5 to 7 ft.
.SUN...NW winds 10 to 15 kt. Seas 5 to 6 ft.
.SUN NIGHT...N to NW winds 15 to 20 kt. Seas 5 to 7 ft.
.MON...N to NW winds 15 to 25 kt. Seas 6 to 9 ft.
.MON NIGHT...N to NW winds 15 to 25 kt. Seas 7 to 9 ft.

$$


Red Flag Warning


URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
817 PM PDT Wed Jul 3 2024

...CRITICAL FIRE WEATHER CONDITIONS INTO FRIDAY AND THE UPCOMING
WEEKEND...

.Red Flag Warnings currently in effect for high elevations of the
North Bay, East Bay Hills, and the Santa Cruz Mtns and have been
extended through 9 PM Saturday. The Marin and Sonoma Coastal
Ranges will see their Red Flag Warning end at 5 AM Friday. Also,
Red Flag Warnings go into effect at 5 AM Friday through 9 PM
Saturday for the higher terrain of Monterey and San Benito
counties as well as the southern Salinas Valley. While the winds
are marginal, this decision was made due to a combination of
continued very low RH in the teens, very dry fuels, and the 4th of
July holiday. Also, gusts up to 25 mph will be possible across
ridgetops and higher peaks. Fuels continue to cure and will see no
relief through this weekend. In fact, 10 and 100 hour fuels are
near historic levels in the North Bay in regard to the energy
release component going into the weekend. The same fuels in the
Diablo Range and Santa Cruz Mtns aren`t far behind.

CAZ502-503-041300-
/O.CON.KMTR.FW.W.0002.000000T0000Z-240705T1200Z/
Marin Coastal Range-Sonoma Coastal Range-
817 PM PDT Wed Jul 3 2024

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY FOR
CRITICALLY DRY FUELS AND LOW HUMIDITY FOR THE MARIN AND SONOMA
COASTAL RANGES...

* AFFECTED AREA...Fire Weather Zone 502 Marin Coastal Range and
  Fire Weather Zone 503 Sonoma Coastal Range.

* TIMING...Until 5 AM Friday.

* WINDS...Southwest 5 to 10 mph with gusts up to 15 to 20 mph.

* RELATIVE HUMIDITY...As low as 15 percent.

* TEMPERATURES...Up to 103.

* IMPACTS...Critical fire weather conditions. Increased chance
  for fire starts in dry, open grasses. Outdoor burning and
  especially fireworks are not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
817 PM PDT Wed Jul 3 2024

...CRITICAL FIRE WEATHER CONDITIONS INTO FRIDAY AND THE UPCOMING
WEEKEND...

.Red Flag Warnings currently in effect for high elevations of the
North Bay, East Bay Hills, and the Santa Cruz Mtns and have been
extended through 9 PM Saturday. The Marin and Sonoma Coastal
Ranges will see their Red Flag Warning end at 5 AM Friday. Also,
Red Flag Warnings go into effect at 5 AM Friday through 9 PM
Saturday for the higher terrain of Monterey and San Benito
counties as well as the southern Salinas Valley. While the winds
are marginal, this decision was made due to a combination of
continued very low RH in the teens, very dry fuels, and the 4th of
July holiday. Also, gusts up to 25 mph will be possible across
ridgetops and higher peaks. Fuels continue to cure and will see no
relief through this weekend. In fact, 10 and 100 hour fuels are
near historic levels in the North Bay in regard to the energy
release component going into the weekend. The same fuels in the
Diablo Range and Santa Cruz Mtns aren`t far behind.

CAZ504-512-515-041300-
/O.CON.KMTR.FW.W.0002.000000T0000Z-240707T0400Z/
North Bay Interior Mountains-Santa Cruz Mountains-East Bay Hills-
817 PM PDT Wed Jul 3 2024

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT SATURDAY FOR
CRITICALLY DRY FUELS AND LOW HUMIDITY FOR NORTH BAY INTERIOR
MOUNTAINS, EAST BAY HILLS, AND SANTA CRUZ MOUNTAINS...

* AFFECTED AREA...Fire Weather Zone 504 North Bay Interior
  Mountains, Fire Weather Zone 512 Santa Cruz Mountains and Fire
  Weather Zone 515 East Bay Hills.

* TIMING...Until 9 PM Saturday.

* WINDS...West 5 to 10 mph with gusts up to 25 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* TEMPERATURES...Up to 107.

* IMPACTS...Critical fire weather conditions. Increased chance
  for fire starts in dry, open grasses. Outdoor burning and
  especially fireworks are not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Francisco CA
817 PM PDT Wed Jul 3 2024

...CRITICAL FIRE WEATHER CONDITIONS INTO FRIDAY AND THE UPCOMING
WEEKEND...

.Red Flag Warnings currently in effect for high elevations of the
North Bay, East Bay Hills, and the Santa Cruz Mtns and have been
extended through 9 PM Saturday. The Marin and Sonoma Coastal
Ranges will see their Red Flag Warning end at 5 AM Friday. Also,
Red Flag Warnings go into effect at 5 AM Friday through 9 PM
Saturday for the higher terrain of Monterey and San Benito
counties as well as the southern Salinas Valley. While the winds
are marginal, this decision was made due to a combination of
continued very low RH in the teens, very dry fuels, and the 4th of
July holiday. Also, gusts up to 25 mph will be possible across
ridgetops and higher peaks. Fuels continue to cure and will see no
relief through this weekend. In fact, 10 and 100 hour fuels are
near historic levels in the North Bay in regard to the energy
release component going into the weekend. The same fuels in the
Diablo Range and Santa Cruz Mtns aren`t far behind.

CAZ516>518-041300-
/O.CON.KMTR.FW.W.0003.240705T1600Z-240707T0400Z/
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains of San Benito County And Interior Monterey County
including Pinnacles National Park-
817 PM PDT Wed Jul 3 2024

...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM FRIDAY TO 9 PM
PDT SATURDAY FOR WINDS, CRITICALLY DRY FUELS, AND LOW HUMIDITY
FOR SANTA LUCIA MOUNTAINS, SAN BENITO COUNTY, AND THE SOUTHERN
SALINAS VALLEY...

* AFFECTED AREA...Fire Weather Zone 516 Southern Salinas
  Valley/Arroyo Seco and Lake San Antonio, Fire Weather Zone 517
  Santa Lucia Mountains and Los Padres National Forest and Fire
  Weather Zone 518 Mountains of San Benito County And Interior
  Monterey County including Pinnacles National Park.

* TIMING...From 9 AM Friday to 9 PM Saturday.

* WINDS...Northwest 10 to 15 mph with gusts up to 25 mph.

* RELATIVE HUMIDITY...As low as 7 percent.

* TEMPERATURES...Up to 112.

* IMPACTS...Critical fire weather conditions. Increased chance
  for fire starts in dry, open grasses. Outdoor burning and
  especially fireworks are not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$


Heat Advisory


URGENT - WEATHER MESSAGE
National Weather Service Sacramento CA
1259 AM PDT Thu Jul 4 2024

CAZ014-068-069-042300-
/O.CON.KSTO.HT.Y.0003.000000T0000Z-240710T0600Z/
Burney Basin / Eastern Shasta County-Western Plumas County/Lassen
Park-West Slope Northern Sierra Nevada-
Including the cities of Burney, Blue Canyon, Chester, and Quincy
1259 AM PDT Thu Jul 4 2024

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT TUESDAY...

* WHAT...Hot conditions with high temperatures up to 95-110. Limited
  overnight relief with low temperatures in the upper 50s to upper
  70s. Areas of Major and Extreme HeatRisk are expected.

* WHERE...Burney Basin / Eastern Shasta County, West Slope Northern
  Sierra Nevada, and Western Plumas County/Lassen Park.

* WHEN...Until 11 PM PDT Tuesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat events, particularly for those working or
  participating in outdoor activities.

* ADDITIONAL DETAILS...Heat could significantly impact outdoor
  holiday activities. Area waterways will continue to run cold and
  fast, creating dangerous conditions for those seeking relief in
  rivers and lakes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.

Monitor the latest forecasts and warnings for updates.

&&

$$

For more information, visit us at www.weather.gov/sto/

IDS

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
756 PM PDT Wed Jul 3 2024

CAZ112-041500-
/O.EXT.KEKA.HT.Y.0003.000000T0000Z-240705T0300Z/
Southwestern Mendocino Interior-
Including Yorkville, Boonville, and Philo
756 PM PDT Wed Jul 3 2024

...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM PDT THURSDAY...

* WHAT...Moderate to localized Major HeatRisk with highs up to 105
  and limited overnight relief with lows near 65.

* WHERE...Southwestern Mendocino Interior.

* WHEN...Until 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat. This level of heat will affect anyone without
  effective cooling or adequate hydration.

* ADDITIONAL DETAILS...Heat could significantly impact outdoor
  holiday activities. Hot weather will continue near record breaking
  temperatures through the week.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
1226 PM PDT Wed Jul 3 2024

CAZ006-041300-
/O.CON.KMTR.HT.Y.0004.000000T0000Z-240705T0200Z/
San Francisco-
1226 PM PDT Wed Jul 3 2024

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT THURSDAY...

* WHAT...Temperatures in the mid to upper 80s expected.
  Temperatures near 90 for southeast portions of the city.

* WHERE...San Francisco.

* WHEN...Until 7 PM PDT Thursday.

* IMPACTS...Those sensitive to heat, such as the homeless,
  elderly, children, and pets will be at risk for heat-related
  illnesses. Those without effective cooling and/or adequate
  hydration will be at the greatest risk.

* ADDITIONAL DETAILS...The temperature will vary greatly across
  the city with the highest temperatures in the SE and downtown
  and more mild temperatures in the West Side and along.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay cool, stay out of the sun, and check
up on relatives and neighbors.

Beat the heat and check the backseat! Do not leave young children
and pets in unattended vehicles. Car interiors will reach lethal
temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to the early
morning or evening. Take action when you see symptoms of heat
exhaustion and/or heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency! Call 9 1 1.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/mtr

URGENT - WEATHER MESSAGE
National Weather Service San Francisco Bay Area
1226 PM PDT Wed Jul 3 2024

CAZ508-528-529-041300-
/O.EXT.KMTR.HT.Y.0004.000000T0000Z-240711T0600Z/
San Francisco Bay Shoreline-
Northern Salinas Valley...Hollister Valley...and Carmel Valley-
Northern Monterey Bay-
1226 PM PDT Wed Jul 3 2024

...HEAT ADVISORY NOW IN EFFECT UNTIL 11 PM PDT WEDNESDAY...

* WHAT...Temperatures in the lower 80s to mid 90s.

* WHERE...San Francisco Bay Shoreline, Northern Monterey Bay,
  and Northern Salinas Valley, Hollister Valley, and Carmel
  Valley.

* WHEN...Until 11 PM PDT Wednesday.

* IMPACTS...Those sensitive to heat, such as the homeless,
  elderly, children, and pets will be at risk for heat-related
  illnesses. Those without effective cooling and/or adequate
  hydration will be at the greatest risk.

* ADDITIONAL DETAILS...An exceptionally dangerous situation is
  expected to unfold over the next week as we enter a
  potentially historic and deadly heat event for inland areas.
  Several days of temperatures well above normal will lead to
  compounding effects among people and infrastructure, with the
  possibility of numerous heat related fatalities. It cannot be
  stressed enough that while one day at these temperatures may
  be manageable for some, an event of this scale, magnitude, and
  longevity will likely rival anything we`ve seen in the last 18
  years. Heat is the number one weather related killer in the
  United States. By this weekend, it is VERY LIKELY that we add
  to that statistic if preparations are not taken seriously.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay cool, stay out of the sun, and check
up on relatives and neighbors.

Beat the heat and check the backseat! Do not leave young children
and pets in unattended vehicles. Car interiors will reach lethal
temperatures in a matter of minutes.

Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to the early
morning or evening. Take action when you see symptoms of heat
exhaustion and/or heat stroke.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency! Call 9 1 1.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
814 AM PDT Wed Jul 3 2024

CAZ071>073-NVZ002-042100-
/O.CON.KREV.HT.Y.0003.240706T1700Z-240710T1700Z/
Greater Lake Tahoe Area-Lassen-Eastern Plumas-Eastern Sierra
Counties-Mono County-
Including the cities of Coleville, Lee Vining, Susanville,
Loyalton, Incline Village, Mammoth Lakes, South Lake Tahoe,
Glenbrook, Bridgeport, Sierraville, Markleeville, Stateline,
Truckee, Westwood, Portola, and Tahoe City
814 AM PDT Wed Jul 3 2024

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 10 AM PDT
WEDNESDAY...

* WHAT...Temperatures are going to warm significantly as we head
  into the 4th of July weekend with afternoon highs 90 to 95 degrees
  in most valley areas, locally to 105+ degrees across the hotter
  Chalfant Valley in Mono County and the Honey Lake area including
  Susanville in northeast CA. While overnights will cool briefly,
  these daytime temperatures will be at record levels and very
  unusual even for summer. This will result in a prolonged period of
  Moderate HeatRisk.

* WHERE...Greater Lake Tahoe Area, Lassen-Eastern Plumas-Eastern
  Sierra Counties, and Mono County.

* WHEN...From 10 AM Saturday to 10 AM PDT Wednesday.

* IMPACTS...This extended period of hot weather may cause heat
  illnesses, especially for those with no access to air conditioning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

&&

$$

WH


Coastal Flood Advisory


Coastal Hazard Message
National Weather Service San Francisco CA
247 AM PDT Thu Jul 4 2024

CAZ006-506-508-042200-
/O.CON.KMTR.CF.Y.0010.000000T0000Z-240705T1200Z/
San Francisco-North Bay Interior Valleys-
San Francisco Bay Shoreline-
247 AM PDT Thu Jul 4 2024

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT
FRIDAY...

* WHAT...Minor coastal flooding.

* WHERE...Bayshore coasts along the San Francisco and San Pablo
  Bays.

* WHEN...Until 5 AM PDT Friday.

* IMPACTS...Flooding of lots, parks, and roads with only
  isolated road closures expected.

* ADDITIONAL DETAILS...Tidal levels are increasing as a result of
  higher astronomical tides. Low lying areas within the SF Bay
  Area may see minor flooding as a result during high tide. Next
  high tide in San Francisco is 6.71 feet at 10:45 PM July 4th.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.

&&

$$


Small Craft Advisory


URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
340 AM PDT Thu Jul 4 2024

PZZ670-041845-
/O.EXB.KLOX.SC.Y.0095.240705T2200Z-240706T1000Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
340 AM PDT Thu Jul 4 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM FRIDAY TO 3 AM PDT
SATURDAY...

* WHAT...Hazardous wind and sea conditions.

* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM.

* WHEN...From 3 PM Friday to 3 AM PDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
  for more.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
237 AM PDT Thu Jul 4 2024

PZZ565-041745-
/O.NEW.KMTR.SC.Y.0124.240705T2200Z-240706T1000Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 nm-
237 AM PDT Thu Jul 4 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM FRIDAY TO 3 AM PDT
SATURDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt
  expected.

* WHERE...Coastal Waters from Point Pinos to Point Piedras
  Blancas California out to 10 nm.

* WHEN...From 3 PM Friday to 3 AM PDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/sanfrancisco

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
237 AM PDT Thu Jul 4 2024

PZZ576-041745-
/O.NEW.KMTR.SC.Y.0124.240705T2200Z-240706T1000Z/
Waters from Point Pinos to Point Piedras Blancas 10-60 NM-
237 AM PDT Thu Jul 4 2024

...SMALL CRAFT ADVISORY IN EFFECT FROM 3 PM FRIDAY TO 3 AM PDT
SATURDAY...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 30 kt
  expected.

* WHERE...Waters from Point Pinos to Point Piedras Blancas 10-
  60 NM.

* WHEN...From 3 PM Friday to 3 AM PDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$


Hazardous Seas Warning


URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
236 AM PDT Thu Jul 4 2024

PZZ475-041600-
/O.CON.KEKA.SE.W.0027.000000T0000Z-240704T1600Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
236 AM PDT Thu Jul 4 2024

...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...

* WHAT...Very steep and hazardous seas 9 to 14 feet.

* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.

* WHEN...Until 9 AM PDT this morning.

* IMPACTS...Very steep and hazardous seas could capsize or cause
  damage to vessels.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.

&&

$$


Fire Weather Watch


URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
315 PM PDT Wed Jul 3 2024

...RISK OF CRITICAL FIRE WEATHER CONDITIONS THURSDAY EVENING
THROUGH FRIDAY NIGHT OVER MOST MOUNTAINS, SOUTHWEST SANTA BARBARA
COUNTY, AND INTERIOR SAN LUIS OBISPO COUNTY...

.A extremely long-duration heat wave will bring very hot and dry
conditions to Southwestern California through at least the
weekend. The hot and dry conditions will coincide with northwest
to northeast winds, gusting from 20 to 40 mph, Thursday evening
through Friday night across many mountain and interior areas, as
well as southwest Santa Barbara County. While classic Red Flag
thresholds will likely not be met, considering the extreme nature
of this event and the holiday fire ignition sources available,
conditions are favorable for critical fire weather behavior.

CAZ238-342>345-041700-
/O.NEW.KLOX.FW.A.0002.240705T1700Z-240706T1300Z/
Cuyama Valley-Santa Lucia Mountains-Southern Salinas Valley-
San Luis Obispo County Interior Valleys-
San Luis Obispo County Mountains-
315 PM PDT Wed Jul 3 2024

...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY MORNING THROUGH LATE
FRIDAY NIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR INTERIOR SAN
LUIS OBISPO COUNTY AND THE CUYAMA VALLEY...

The National Weather Service in Los Angeles/Oxnard has issued a
Fire Weather Watch for wind and low relative humidity, which is
in effect from Friday morning through late Friday night.

* WINDS...North to northeast winds gusting to 20 to 35 mph.

* RELATIVE HUMIDITY...Minimum relative humidity 6 to 12 percent
  with poor to moderate overnight recovery.

* IMPACTS...Conditions may be favorable for rapid fire growth
  and extreme fire behavior.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that critical fire weather conditions
are likely to occur in the coming days. Residents near wildland
interfaces should prepare now on what to do if a wildfire breaks
out. See readyforwildfire.org and wildfirerisk.org for
information..

&&

$$

Kittell


Marine Weather Statement


Marine Weather Statement
National Weather Service Los Angeles/Oxnard CA
1223 PM PDT Wed Jul 3 2024

PZZ645-650-655-670-673-676-051800-
Point Piedras Blancas to Point Sal westward out to 10 NM-
East Santa Barbara Channel from Pt. Conception to Pt. Mugu CA
including Santa Cruz Island-
Inner waters from Point Mugu to San Mateo Pt. CA including Santa
Catalina and Anacapa Islands-
Point Piedras Blancas to Point Sal from 10 to 60 NM-
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
1223 PM PDT Wed Jul 3 2024

...DENSE FOG WILL CONTINUE ACROSS THE COASTAL WATERS FOR THE
REMAINDER OF THIS WEEK...

Dense fog is forecast to continue across the coastal waters for
the remainder of this week. While the coverage of the fog will
lessen from day-to-day, patchy dense fog is expected for the rest
of this week.

Mariners should be prepared for abrupt visibility changes down to
one nautical mile or less. Reduce speeds and be on the lookout
for exposed rocks and other vessels, including large ships in the
shipping lanes. Use radar or GPS navigation if available, and
consider remaining in harbor if such equipment is unavailable.

$$

Cohen

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: [email protected]
Page last modified: June 2, 2009
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE
OSZAR »