Active Weather Alerts
Coastal Flood Advisory
Issued: 11:59 AM Apr. 30, 2026 – National Weather Service
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL NOON EDT TODAY... * WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Southeast Harford County. * WHEN...Until noon EDT today, especially around the time of high tide. * IMPACTS...At 4.0 feet, water begins to go over the bulkhead at the Havre de Grace Yacht Basin in multiple locations. * ADDITIONAL DETAILS...Tides one and a half to two feet above normal. The next high tide at Havre de Grace is at 9:56 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. Chesapeake Bay at Havre de Grace MD MLLW Categories - Minor 4.0 ft, Moderate 5.5 ft, Major 7.0 ft MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 5.2 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 30/09 AM 4.2 1.8 1.7 1.0 Minor 30/10 PM 2.8 0.4 0.7 1.0 None 01/10 AM 3.1 0.7 0.5 0.5 None 01/11 PM 2.6 0.2 0.6 0.5 None 02/11 AM 3.5 1.1 0.7 0.5 None 03/12 AM 2.4 -0.0 0.4 0.5 None &&
Small Craft Advisory
Issued: 9:13 AM Apr. 30, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING... * WHAT...Northwest winds 10 to 20 kt with gusts up to 25 kt. * WHERE...Tidal Potomac River from Key Bridge to Smith Point VA, and Chesapeake Bay and adjoining estuaries north of Smith Point VA. * WHEN...Until 7 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. &&
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