Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Last Update: 401 PM EDT Mon Apr 13 2026

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For More Weather Information:

Philadelphia, PA Local Forecast Office

15NM E Lewes DE

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT TUESDAY...

Tonight
SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave detail: S 4 ft at 6 seconds and E 2 ft at 9 seconds.
Tue
SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 4 ft. Wave detail: SW 3 ft at 6 seconds and SE 2 ft at 9 seconds.
Tue Night
SW winds 10 to 15 kt. Seas around 3 ft. Wave detail: S 3 ft at 5 seconds and SE 2 ft at 9 seconds.
Wed
SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds.
Wed Night
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave detail: S 3 ft at 5 seconds and SE 1 foot at 9 seconds.
Thu
SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave detail: S 3 ft at 6 seconds and SE 1 foot at 9 seconds.
Thu Night
SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft.
Fri
SW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft.
Fri Night
SW winds 5 to 10 kt, becoming NW after midnight. Seas around 2 ft.
Sat
E winds 5 to 10 kt. Seas around 2 ft.
Sat Night
SE winds 10 to 15 kt. Seas 2 to 3 ft.



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401 PM EDT Mon Apr 13 2026
 
 

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