Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

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

Latest Marine Discussion:

.MARINE... If the linear segment of showers and embedded thunder over southeastern Pennsylvania moves into northern zones of the Chesapeake Bay late this evening into the overnight, it could prompt Marine Weather Statements or a Special Marine Warning. The latter has a low chance of occurring. A Small Craft Advisory remains in effect for the wider waters until 11 PM. Winds shift to northerly on Friday morning behind the cold front. Some northerly channeling effects are possible on Friday morning into the afternoon due to the frontal surge. Small Craft Advisories may be needed for such an evolution, although current guidance does not offer enough confidence in more than occasional marginal gusts. A second surge could also occur Friday evening. As high pressure passes by to the north, winds shift from northeasterly to east- southeasterly on Saturday. This could bring a few gusts to near 20 knots which could approach advisory levels, especially by Saturday night. Small Craft Advisory conditions are possible on Sunday as south/southwest winds gust up to 20 knots across the waters. Winds diminish overnight before shifting to north/northeasterly on Monday with SCA criteria wind gusts possible. Additionally, showers and thunderstorms each day may lead to SMWs. Update as of: 900 PM EDT Thu Sep 17 2026

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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