Dangerous Heat in the Central and Southern U.S.; Thunderstorms and Heavy Rain in the Northern Plains

Dangerous, prolonged heat is expected across portions of the Central and Southeast U.S. through July. Scattered severe thunderstorms are expected over parts of the northern Plains into the upper Mississippi Valley Tuesday, with damaging winds and large hail as the primary threats. Heavy rainfall could lead to areas of flooding across the northern Plains, Upper Midwest, Southeast and Southwest. Read More >

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

Latest Marine Discussion:

.MARINE... Light north to northeast winds are expected to continue through Tuesday morning as high pressure sits north of the waters. Winds will slowly chance to the east Tuesday afternoon before switching to the southeast Wednesday at less than 15kts. There still remains a brief window for SCA conditions for an 1 to 3 hours due to northerly channeling. Highest condfidence (albeit low) would be over northern and middle portions of the bay. A Marine Weather Statement may be needed to encompass this threat as it evolves. SCA conditions are possible Thursday through Fri night, particularly at night due to channeling. SMWs may be needed during the afternoon and evening hours this weekend as thunderstorm chances increase across the region. Update as of: 822 PM EDT Mon Jul 21 2025

Click/Tap on any zone on map below for marine forecast:
Click here for the Synopsis and text forecast.

[LWX marine zones]

NEW FORECAST TOOL: Experimental NWS Marine Forecast Portal

Click on any marine zone on this map to go to a detailed hour-by-hour weather forecast for the next 7 days

Please provide feedback to cody.ledbetter@noaa.gov

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Marine Forecasts for the Lower Chesapeake Bay and Eastern VA Rivers

(These forecasts are provided by the Weather Forecast Office in Wakefield, VA)

Lower Chesapeake Bay

Smith Point to Windmill Point

Windmill Point to New Point Comfort

New Point Comfort to Little Creek

Little Creek to Cape Henry Incl. CBBT

Eastern VA Rivers

Rappahannock River (Urbanna-Windmill Pt)

York River

James River (Jamestown-James River Bridge)

James River (James River Bridge-HRBT)

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