Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

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

Latest Marine Discussion:

.MARINE... An increase in S/SE flow is likely today, especially this aft, so have issued SCAs that go through Sun eve for the waters. The central and northern Potomac and Bay drop out tonight when the winds are expected to be lower. This aft/eve is due to favorable channeling and an increasing background gradient/wind field. After a brief lull over most of the waters (except near southern MD) late Sat night, winds will shift to the NW and quickly become gusty as a strong cold front crosses early Sun morning. Gale-force gusts are quite possible with 30-40 kts in the mixed- layer amid cold advection and strong pressure rises. However, the most favorable window for gusts may be brief (less than 3 hours, i.e. in the SMW vs. GLW realm). Therefore, have the SCA going through Sun eve with anticipation of SMW along FROPA. It will be breezy nonetheless Sun into Sun night, likely right on into early next week. SCAs are likely on Mon as NW winds gust up to 20 knots in the wake of the cold front. Winds shift to S and diminish to below SCA criteria overnight through Tue morn. Winds may briefly reach low-end SCA levels within channeled S'ly flow Tue night. Sub-SCA level W'ly winds are forecast for Wed. Update as of: 1100 AM EDT Sat Apr 18 2026

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[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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