Severe Thunderstorm and Flash Flooding Threats in the South

Organized severe thunderstorms capable of producing mainly large hail and perhaps damaging winds are expected across portions of Louisiana this afternoon with a second round further west tonight. Heavy thunderstorms may lead to flash flooding over portions of the northern Gulf Coast today through Saturday. Several inches of excessive rainfall are possible with Flash Flood Watches in effect.
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Hazardous Weather Conditions

Small Craft Advisory until April 13, 05:00 PM EDT

Last Update: 102 PM EDT Tue Apr 13 2021

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Philadelphia, PA Local Forecast Office

20NM SSW Atlantic City NJ

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON...

Synopsis: As low pressure continues to depart offshore, weak high pressure will build into the region today. That high pressure will shift offshore overnight. A slow moving storm system will then affect our region from Wednesday through Friday as low pressure coming from the west moves overhead and intensifies just off the coast. Eventually, high pressure is expected to build in for most of the weekend. Another area of low pressure may affect the region early next week.

This Afternoon

NE winds 5 to 10 kt. Seas 3 to 5 ft. Swell mainly from the E with a dominant period of 9 seconds.

Tonight

SE winds around 5 kt, becoming SW in the late evening and overnight. Seas 3 to 4 ft. Swell mainly from the E with a dominant period of 8 seconds.

Wed

SW winds 5 to 10 kt, becoming S 10 to 15 kt late. Seas 3 to 4 ft. A chance of rain in the afternoon. Swell mainly from the E with a dominant period of 8 seconds.

Wed Night

S winds 10 to 15 kt with gusts up to 20 kt, becoming SE with gusts up to 20 kt late. Seas around 3 ft. A chance of rain early in the evening, then rain in the late evening and overnight. Swell mainly from the E with a dominant period of 10 seconds.

Thu

E winds around 10 kt, becoming N in the afternoon. Gusts up to 20 kt. Seas 3 to 4 ft. Rain.

Thu Night

NW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain in the evening.

Fri

NW winds 15 to 20 kt. Seas 3 to 5 ft.

Fri Night

NW winds around 15 kt. Seas 3 to 5 ft.

Sat

NW winds 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 3 to 4 ft.

Sat Night

SW winds 5 to 10 kt. Seas around 3 ft.