Active Weather Alerts
Coastal Flood Advisory
Issued: 12:36 PM Sep. 26, 2026 – National Weather Service
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT MONDAY... * WHAT...Around two feet of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Charles and King George Counties. * WHEN...Until 8 AM EDT Monday, especially around the time of high tide. * IMPACTS...At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren. * ADDITIONAL DETAILS...Tides two to two and a half feet above normal. The next high tide at Indian Head is at 8:23 PM and 8:47 AM. The next high tide at Goose Bay is at 4:29 PM and 4:53 AM. The next high tide at Dahlgren is at 3:17 PM and 3:35 AM. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && Time of high total tides are approximate to the nearest hour. Upper Machodoc Creek at Dahlgren MLLW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 7.0 ft MHHW Categories - Minor 1.6 ft, Moderate 3.1 ft, Major 5.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 26/03 PM 3.9 2.0 1.7 0.5 Minor 27/04 AM 4.0 2.1 1.9 0.5 Minor 27/04 PM 4.2 2.3 1.9 0.5 Minor 28/04 AM 3.9 2.0 1.8 0.5 Minor 28/04 PM 3.4 1.5 1.2 0.5 None 29/05 AM 3.0 1.1 0.9 0.5 None &&
Small Craft Advisory
Issued: 11:45 AM Sep. 26, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT SUNDAY... * WHAT...North winds 10 to 20 kt with gusts up to 30 kt. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, and Patapsco River including Baltimore Harbor. * WHEN...Until 6 AM EDT Sunday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
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