Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Excessive Heat Across the Western and Southern U.S.

Severe thunderstorms will be possible on Independence Day, mainly across parts of the Upper Mississippi Valley, Ozarks, and southern/central Plains. Excessive heat with possible record highs and warm overnight lows will continue to impact much of the West into next week. Dangerous heat is expected across the Southern U.S. and Mid-Atlantic into the weekend. Read More >

Map of estimated Water Temperatures
List of Water Temperature observations (at bottom of page/list)

Latest Marine Discussion:

.MARINE... Southern channeling will result in gusty winds over the open waters this morning with a Small Craft Advisory in effect. Winds shift to southeasterly this morning, allowing for wind gusts to diminish slightly. A Small Craft Advisory is in effect for the southern portions of the Chesapeake Bay through tonight with sub-SCA criteria winds expected elsewhere. SMWs are possible over the waters each afternoon through Saturday with daily chances of showers and thunderstorms. Weak high pressure builds into the area from the north to end the weekend, bringing lighter winds and dry conditions. A warm front lifts north through the waters on Monday, with southerly channeling possibly leading to near-SCA winds in the open waters of the Chesapeake Bay Monday evening. A few thunderstorms are possible over the waters Monday afternoon, though most should be well inland. Update as of: 355 AM EDT Thu Jul 4 2024