Special Marine Warning Issued for Tidal Potomac River MD
This alert is no longer in effect.
NOAA issued it on August 3, 2026, 2 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS Baltimore/Washington has issued a Special Marine Warning for the Tidal Potomac from Key Bridge to Cobb Island MD until 2:15 PM EDT due to strong thunderstorms.
Read this weather record in 30 seconds
- Record type
- Special Marine Warning
- Affected area
- Tidal Potomac River, Maryland
- Issued
- August 3, 2026
- Issuing authority
- NWS Baltimore MD/Washington DC
Marine notices apply to named waters or shoreline zones. They may not describe conditions on land, even when the nearest place name is the same.
Record status: historical. It was issued 2 weeks ago; use the issuing agency's live warning service for current conditions in Tidal Potomac River, Maryland.
Alert Details
A Special Marine Warning has been issued by the National Weather Service in Baltimore MD/Washington DC. The alert is effective from August 3 at 12:43 PM EDT until August 3 at 2:15 PM EDT.
Affected Areas
The warning covers Tidal Potomac from Key Bridge to Indian Head MD and Tidal Potomac from Indian Head to Cobb Island MD. Locations impacted include Leesylvania State Park, National Harbor, Smallwood State Park, Quantico, Fort Washington, Tidal Basin, Reagan National Airport, Gunston Hall, Mason Neck State Park, Woodrow Wilson Bridge, Indian Head, Key Bridge, Occoquan Bay, Fort Hunt, and Alexandria.
What You Should Do
Boaters should move to safe harbor until hazardous weather passes.
Expected Conditions
At 12:43 PM EDT, strong thunderstorms were developing along a line extending from 6 nm northwest of Alexandria to 8 nm northwest of Mason Neck State Park to 13 nm northwest of Leesylvania State Park, moving east at 15 knots. Hazard includes wind gusts 34 knots or greater, detected by radar.
Timeline
The warning is in effect from 12:43 PM EDT to 2:15 PM EDT on August 3, 2026.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,121 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 3, 2026.
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