Heavy Rains and Catastrophic Flooding Possible in Hawaii

A kona low will continue to bring heavy rain to Hawaii bringing flooding and flash flooding, landslides, road closures, and low visibility with high rainfall rates expected. Lake effect snow is expected downwind from the Great Lakes. Blizzard conditions are expected in the southeast Alaska.
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Last Update: 702 AM EST Tue Dec 7 2021

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Philadelphia, PA Local Forecast Office

20NM SSW Atlantic City NJ

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING...

Synopsis: High pressure will migrate through the Northeast through tonight. A weak surface low will advance from the Gulf Coast region today to the Carolina coast by Wednesday morning, before rapidly moving offshore. High pressure will briefly build into the eastern U.S. Wednesday night and Thursday. A warm front will lift northward through the Mid-Atlantic Friday night and Saturday, followed by a cold front Saturday night. Very strong high pressure will build into much of the eastern U.S. by early next week.

Today
NW winds 15 to 20 kt with gusts up to 25 kt, diminishing to 5 to 10 kt. Seas 3 to 5 ft. Swell mainly from the N with a dominant period of 8 seconds, becoming mainly from the SE with a dominant period of 8 seconds this afternoon.
Tonight
NW winds around 5 kt, becoming NE late. Seas around 3 ft. Swell mainly from the SE with a dominant period of 8 seconds.
Wed
NE winds 5 to 10 kt, becoming N early in the afternoon, then becoming NW 10 to 15 kt late. Seas around 3 ft. Rain likely. Snow likely until late afternoon, then a chance of snow late. Vsby 1 to 3 nm. Swell mainly from the SE with a dominant period of 7 seconds.
Wed Night
NW winds 10 to 15 kt, increasing to 15 to 20 kt in the late evening and overnight. Gusts up to 25 kt. Seas 3 to 4 ft. A chance of rain or snow early in the evening with vsby 1 to 3 nm. Swell mainly from the SE with a dominant period of 8 seconds, becoming mainly from the NW with a dominant period of 5 seconds after midnight.
Thu
NW winds 15 to 20 kt, diminishing to 5 to 10 kt in the afternoon. Seas around 3 ft.
Thu Night
SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 ft or less.
Fri
SW winds 10 to 15 kt. Seas around 3 ft. A chance of showers in the afternoon.
Fri Night
S winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Seas 3 to 4 ft. A chance of showers.
Sat
S winds 20 to 25 kt. Seas 4 to 6 ft.
Sat Night
SW winds 20 to 25 kt. Seas 5 to 7 ft. A chance of showers in the evening, then showers likely after midnight.
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ABOUT THIS FORECAST

Last Update: 702 AM EST Tue Dec 7 2021
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