Active Weather Alerts
Special Marine Warning
Issued: 2:21 PM Apr. 20, 2026 – National Weather Service
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT... For the following areas... Tidal Potomac from Key Bridge to Indian Head MD... At 1021 AM EDT, showers were located along a line extending from 14 nm northwest of Key Bridge to 16 nm west of Tidal Basin to 19 nm west of Alexandria, moving east at 20 knots. HAZARD...Wind gusts 34 knots or greater and small hail. SOURCE...Observed wind and hail. IMPACT...Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. Locations impacted include... Tidal Basin, Fort Washington, Reagan National Airport, Gunston Hall, Woodrow Wilson Bridge, Key Bridge, Fort Hunt, National Harbor, and Alexandria. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && HAIL...<.75IN; WIND...>34KTS
Special Marine Warning
Issued: 1:24 PM Apr. 20, 2026 – National Weather Service
...GUSTY SHOWERS WITH SMALL HAIL THROUGH MID AFTERNOON... A few showers and perhaps an isolated thunderstorm are possible through mid afternoon. Some of these storms may contain wind gusts to gale force and small hail. Special Marine Warnings may be needed for portions of the waters during this time.
Small Craft Advisory
Issued: 12:47 PM Apr. 20, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING... * WHAT...Northwest winds 10 to 15 kt with gusts up to 25 kt. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Sandy Point MD, Patapsco River including Baltimore Harbor, Chester River to Queenstown MD, Eastern Bay, and Patuxent River to Broomes Island MD. * WHEN...Until 9 PM EDT this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
Freeze Warning
Issued: 12:45 PM Apr. 20, 2026 – National Weather Service
...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM EDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 29 expected, especially in outlying areas away from larger bodies of water. * WHERE...Washington DC, and portions of central, northern, and southern Maryland, and central and northern Virginia. * WHEN...From 2 AM to 10 AM EDT Tuesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent water pipes from freezing, wrap or drain or allow them to drip slowly. &&
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