SMW sent by KNA/DAS
expired 2 months ago
The National Weather Service has issued A SPECIAL MARINE WARNING for the following counties or areas: Tidal Potomac from Indian Head to Cobb Island,MD, Northwest Atlantic; at 6:11 PM on AUG 20, 2026 Effective until 7:11 PM. Message from ALPINE. 
Additional alert information
Originator FIPS Codes Start Time End Time Severity
WXR 073536 8/20/2026 10:11:00 PM (UTC)
2 months ago
8/20/2026 11:11:00 PM (UTC)
2 months ago
WARNING