Excessive Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Medford OR
143 AM PDT Thu Jul 4 2024
CAZ080-081-ORZ024-026-050000-
/O.CON.KMFR.EH.W.0001.240704T1500Z-240709T0400Z/
Western Siskiyou County-Central Siskiyou County-Eastern Curry
County and Josephine County-Jackson County-
Including the cities of Ashland, Hilt, Weed, Jacksonville, Yreka,
Fort Jones, Happy Camp, Wilderville, Etna, Medford, Greenview,
Klamath River, Rogue River, Butte Falls, Grants Pass, Scott Bar,
Applegate, Somes Bar, Callahan, Shady Cove, Cave Junction, Gold
Hill, and Merlin
143 AM PDT Thu Jul 4 2024
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO 9 PM PDT MONDAY...
* WHAT...Dangerously hot conditions with high temperatures of 110 to
115 and low temperatures in the upper 60s expected over multiple
days.
* WHERE...In California, western and central Siskiyou County. This
includes the cities of Yreka, Weed, Etna, and Happy Camp. In
Oregon, Josephine and Jackson counties and eastern Curry County.
This includes the entire Rogue Valley and the cities of Medford,
Grants Pass, Cave Junction, and Butte Falls.
* WHEN...From 8 AM this morning to 9 PM PDT Monday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events, particularly for those working or
participating in outdoor activities. Area rivers will be cold and
can cause shock to swimmers.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
116 AM PDT Thu Jul 4 2024
CAZ520-522-523-NVZ017-020-041800-
/O.EXT.KVEF.EH.W.0003.000000T0000Z-240711T0600Z/
Owens Valley-Death Valley National Park-Western Mojave Desert-
Western Clark and Southern Nye County-Las Vegas Valley-
Including the cities of Lone Pine, Indian Springs, Henderson,
Boulder City, Stovepipe Wells, Furnace Creek, Fort Irwin,
Pahrump, Amargosa Valley, North Las Vegas, Olancha, Las Vegas,
Independence, Shoshone, Daggett, Desert Rock, Bishop, and Barstow
116 AM PDT Thu Jul 4 2024
...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 11 PM PDT WEDNESDAY...
* WHAT...Dangerously hot conditions for an unusually long period.
High temperatures 105 to 111 in the Owens Valley, 110 to 118 in
Las Vegas, Pahrump, and Barstow, and 122 to 129 at Furnace Creek
in Death Valley National Park.
* WHERE...In California, Death Valley National Park, Owens Valley,
and Western Mojave Desert. In Nevada, Las Vegas Valley and Western
Clark and Southern Nye County.
* WHEN...Until 11 PM PDT Wednesday.
* IMPACTS...Heat-related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Hot temperatures overnight will mean little
relief from the daytime heat, especially in Las Vegas and Death
Valley, where low temperatures may not fall below 90 degrees for
several days.
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.
Monitor the latest forecasts and warnings for updates.
&&
$$
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 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
CAZ105-107-108-041500-
/O.CON.KEKA.EH.W.0001.000000T0000Z-240707T0300Z/
Northern Humboldt Interior-Northern Trinity-Southern Trinity-
Including Weaverville, Junction City, Hoopa, Carrville, Helena,
Big Bar, Peanut, Hayfork, Willow Creek, Trinity Center,
Weitchpec, Hyampom, Douglas City, Del Loma, Ruth, Orleans, and
Forest Glen
756 PM PDT Wed Jul 3 2024
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
SATURDAY...
* WHAT...Dangerously hot conditions with heat index values up to 105.
* WHERE...Trinity County.
* WHEN...Until 8 PM PDT Saturday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
756 PM PDT Wed Jul 3 2024
CAZ110-111-041500-
/O.CON.KEKA.EH.W.0001.000000T0000Z-240707T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Including Potter Valley, Legget, Covelo, Willits, and Laytonville
756 PM PDT Wed Jul 3 2024
...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
SATURDAY...
* WHAT...Major to localized extreme HeatRisk with highs up to 105
and limited overnight relief with lows near 65.
* WHERE...Northern Mendocino Interior.
* WHEN...Until 8 PM PDT Saturday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat. This level of heat will affect anyone without
effective cooling or adequate hydration.
* ADDITIONAL DETAILS...Heat could significantly impact outdoor
holiday activities. Hot weather will begin on Tuesday with near
record breaking temperatures through the week.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
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.
&&
$$
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.
&&
$$
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Medford OR
143 AM PDT Thu Jul 4 2024
CAZ084-085-ORZ029>031-050000-
/O.CON.KMFR.HT.Y.0001.240704T1500Z-240709T0400Z/
Northeast Siskiyou and Northwest Modoc Counties-Modoc County-
Klamath Basin-Northern and Eastern Klamath County and Western
Lake County-Central and Eastern Lake County-
Including the cities of Tulelake, Valley Falls, Klamath Falls,
Beatty, Bly, Olene, Likely, New Pine Creek, Macdoel, Davis Creek,
Midland, Paisley, Alturas, Newell, Sprague River, Fort Rock,
Gilchrist, Day, Altamont, Chemult, Adel, Adin, Dorris, Crescent,
Canby, Lakeview, and Lookout
143 AM PDT Thu Jul 4 2024
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 9 PM
PDT MONDAY...
* WHAT...High temperatures of 95 to 100 degrees with lows in the
upper 50`s expected over multiple days.
* WHERE...In California, Modoc County and northeast Siskiyou County.
This includes the cities of Macdoel and Alturas. In Oregon, Lake
County and eastern Klamath County. This includes the cities of
Klamath Falls, Chemult, Summer Lake, and Lakeview
* WHEN...From 8 AM this morning to 9 PM PDT Monday.
* IMPACTS...Hot temperatures may cause heat illnesses. Area rivers
will be cold and can cause shock to swimmers.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
AH
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.
&&
$$
For more information, visit us at www.weather.gov/sto/
IDS
URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
756 PM PDT Wed Jul 3 2024
CAZ104-106-041500-
/O.EXT.KEKA.HT.Y.0003.000000T0000Z-240705T0300Z/
Southwestern Humboldt-Southern Humboldt Interior-
Including Ettersburg, Garberville, Benbow, Alderpoint, and
Briceland
756 PM PDT Wed Jul 3 2024
...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM PDT THURSDAY...
* WHAT...Moderate to localized Major HeatRisk with highs up to 105
and limited overnight relief with lows near 65.
* WHERE...Southern Humboldt.
* WHEN...Until 8 PM PDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat. This level of heat will affect anyone without
effective cooling or adequate hydration.
* ADDITIONAL DETAILS...Heat could significantly impact outdoor
holiday activities. Hot weather will continue near record breaking
temperatures through the week.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service 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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Reno NV
814 AM PDT Wed Jul 3 2024
CAZ070-042100-
/O.EXA.KREV.HT.Y.0003.240706T1700Z-240710T1700Z/
Surprise Valley California-
Including the cities of Eagleville, Fort Bidwell, and Cedarville
814 AM PDT Wed Jul 3 2024
...HEAT ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 10 AM PDT
WEDNESDAY...
* WHAT...Temperatures are going to warm significantly as we head
into the 4th of July weekend with afternoon highs 100 to 105
degrees. While overnights will cool briefly, these daytime
temperatures will be at record levels and very unusual even for
summer. This will result in a prolonged period of Moderate
HeatRisk.
* WHERE...Surprise Valley California.
* WHEN...From 10 AM Saturday to 10 AM PDT Wednesday.
* IMPACTS...This extended period of hot weather may cause heat
illnesses, especially for those with no access to air conditioning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
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.
&&
$$
WH
Coastal Flood Advisory
Coastal Hazard Message
National Weather Service San Francisco CA
247 AM PDT Thu Jul 4 2024
CAZ006-506-508-042200-
/O.CON.KMTR.CF.Y.0010.000000T0000Z-240705T1200Z/
San Francisco-North Bay Interior Valleys-
San Francisco Bay Shoreline-
247 AM PDT Thu Jul 4 2024
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 5 AM PDT
FRIDAY...
* WHAT...Minor coastal flooding.
* WHERE...Bayshore coasts along the San Francisco and San Pablo
Bays.
* WHEN...Until 5 AM PDT Friday.
* IMPACTS...Flooding of lots, parks, and roads with only
isolated road closures expected.
* ADDITIONAL DETAILS...Tidal levels are increasing as a result of
higher astronomical tides. Low lying areas within the SF Bay
Area may see minor flooding as a result during high tide. Next
high tide in San Francisco is 6.71 feet at 10:45 PM July 4th.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
$$
Hazardous Seas Warning
URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
236 AM PDT Thu Jul 4 2024
PZZ470-041600-
/O.CAN.KEKA.GL.W.0041.000000T0000Z-240704T1000Z/
/O.EXB.KEKA.SE.W.0027.240704T1000Z-240704T1600Z/
Pt St George to Cape Mendocino 10 to 60 nm-
236 AM PDT Thu Jul 4 2024
...HAZARDOUS SEAS WARNING IN EFFECT UNTIL 9 AM PDT THIS MORNING...
...GALE WARNING IS CANCELLED...
* WHAT...Very steep and hazardous seas 11 to 16 feet expected.
* WHERE...Pt St George to Cape Mendocino 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
236 AM PDT Thu Jul 4 2024
PZZ475-041600-
/O.CON.KEKA.SE.W.0027.000000T0000Z-240704T1600Z/
Cape Mendocino to Pt Arena 10 to 60 nm-
236 AM PDT Thu Jul 4 2024
...HAZARDOUS SEAS WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS
MORNING...
* WHAT...Very steep and hazardous seas 9 to 14 feet.
* WHERE...Cape Mendocino to Pt Arena 10 to 60 nm.
* WHEN...Until 9 AM PDT this morning.
* IMPACTS...Very steep and hazardous seas could capsize or cause
damage to vessels.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Recreational boaters should remain in port. Commercial vessels
should prepare for rough seas and consider remaining in port
until hazardous seas subside.
&&
$$
Excessive Heat Watch
URGENT - WEATHER MESSAGE
National Weather Service Elko NV
243 AM PDT Thu Jul 4 2024
NVZ030-036-037-040-041-050045-
/O.CON.KLKN.EH.A.0001.240706T1700Z-240710T1700Z/
Humboldt County-Northern Lander County and Northern Eureka County-
Southern Lander County and Southern Eureka County-
Northwestern Nye County-Northeastern Nye County-
Including the cities of Golconda, Winnemucca, Valmy, Dufferena,
Argenta, Battle Mountain, Crescent Valley, Beowawe, Dunphy,
Emigrant Pass, Palisade, Eureka, Pinto Summit, Grass Valley,
Hickison Summit, Diamond Valley, Eureka Airport, Garden Pass,
Manhattan, Round Mountain, Tonopah, Blue Eagle Ranch,
and Duckwater
243 AM PDT Thu Jul 4 2024
...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SATURDAY MORNING
THROUGH WEDNESDAY MORNING...
* WHAT...Dangerously hot conditions with high temperatures in
the middle 90s to lower 100s in valleys possible.
* WHERE...Humboldt County, Northern Lander County and Northern
Eureka County, Southern Lander County and Southern Eureka
County, Northwestern Nye County and Northeastern Nye County.
* WHEN...From Saturday morning through Wednesday morning.
* IMPACTS...Extreme heat will significantly increase the
potential for heat related illnesses, particularly for those
working or participating in outdoor activities.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check up on relatives
and neighbors.
Young children and pets should never be left unattended in
vehicles under any circumstances. This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.
&&
$$
For more information from the National Weather Service visit
https://weather.gov/lkn