Hazardous marine condition(s):
Small Craft Advisory
Hazardous Weather Outlook
ANZ500-202000-
1057 AM EDT Thu Aug 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A cold front will slowly approach from Pennsylvania today as a warm
front approaches from the Virginia Tidewater and Delmarva Peninsula.
Multiple weak waves of low pressure along these boundaries will
ignite scattered to numerous showers and thunderstorms. Some storms
may be severe particularly east of the Blue Ridge and Catoctin
Mountains, and especially across the Interstate 95 corridor toward
the Chesapeake Bay. This frontal system is expected to stall near or
just southeast of the Mid-Atlantic, and additional ripples of low
pressure riding along it may result in periodic showers and a few
thunderstorms at times through the upcoming weekend.
$$
ANZ536-202000- Tidal Potomac from Indian Head to Cobb Island- 1057 AM EDT Thu Aug 20 2026 SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING REST OF TODAY S winds 5 to 10 kt. Gusts up to 20 kt this afternoon. Waves 1 ft. Isolated showers and tstms late this morning, then numerous showers and scattered tstms this afternoon. TONIGHT N winds 5 to 10 kt. Gusts up to 20 kt early in the evening. Waves 1 ft. Numerous showers and scattered tstms. Patchy fog. Vsby 1 NM or less. FRI NE winds around 5 kt. Waves 1 ft. A chance of showers. FRI NIGHT E winds around 5 kt. Waves 1 ft. Showers with a chance of tstms. SAT S winds around 5 kt. Waves 1 ft. Showers likely. SAT NIGHT SW winds around 5 kt. Waves 1 ft or less. A chance of showers. SUN NW winds around 5 kt. Waves 1 ft. A chance of showers through the night. MON NW winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$
ANZ536-202000- Tidal Potomac from Indian Head to Cobb Island- 1057 AM EDT Thu Aug 20 2026 SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING REST OF TODAY S winds 5 to 10 kt. Gusts up to 20 kt this afternoon. Waves 1 ft. Isolated showers and tstms late this morning, then numerous showers and scattered tstms this afternoon. TONIGHT N winds 5 to 10 kt. Gusts up to 20 kt early in the evening. Waves 1 ft. Numerous showers and scattered tstms. Patchy fog. Vsby 1 NM or less. FRI NE winds around 5 kt. Waves 1 ft. A chance of showers. FRI NIGHT E winds around 5 kt. Waves 1 ft. Showers with a chance of tstms. SAT S winds around 5 kt. Waves 1 ft. Showers likely. SAT NIGHT SW winds around 5 kt. Waves 1 ft or less. A chance of showers. SUN NW winds around 5 kt. Waves 1 ft. A chance of showers through the night. MON NW winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$