Strong Storm System To Impact The West

A large, strong and moist Pacific storm system will impact a good portion of the West on Friday through the upcoming weekend. Heavy rain, strong winds, heavy mountain snow and rough surf can be expected. The heavy rain may result in some flash flooding on Friday and Saturday across northern portions of California and southwestern Oregon, especially near recent burn scar areas.
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Last Update: 1158 PM EST Thu Dec 5 2019

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Philadelphia, PA Local Forecast Office

15NM E Lewes DE

Marine Zone Forecast


...SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 AM EST FRIDAY...
Synopsis: High pressure builds across our region tonight, then it slides offshore early Friday. Weak low pressure quickly tracks just to our north on Friday which pulls a cold front across our area. Strong high pressure builds in Saturday before shifting offshore Sunday as a warm front lifts to our north. Low pressure tracks from the southern Plains to across the lower Great Lakes Monday through Tuesday, with a strong cold front sweeping across our area later Tuesday. A secondary cold front may move through Wednesday, then high pressure builds in for Thursday.

Rest Of Tonight
NW winds 10 to 15 kt with gusts up to 25 kt, diminishing to 5 to 10 kt late. Seas 3 to 4 ft. Swell mainly from the NW with a dominant period of 8 seconds.
Fri
SW winds 5 to 10 kt, increasing to 15 to 20 kt with gusts up to 30 kt. Seas 2 ft or less, then 3 to 4 ft in the late morning and afternoon. Swell mainly from the SW with a dominant period of 5 seconds.
Fri Night
SW winds 15 to 20 kt, becoming N after midnight. Gusts up to 30 kt. Seas 3 to 4 ft. Swell mainly from the S with a dominant period of 6 seconds.
Sat
N winds 15 to 20 kt with gusts up to 25 kt, diminishing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 3 ft. Swell mainly from the SE with a dominant period of 6 seconds.
Sat Night
NE winds 5 to 10 kt. Seas 2 ft or less.
Sun
E winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft or less.
Sun Night
S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers in the evening, then showers likely after midnight.
Mon
S winds around 15 kt with gusts up to 25 kt. Seas 3 to 5 ft, building to 4 to 7 ft in the afternoon. Showers likely.
Mon Night
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 5 to 7 ft. Showers likely.
Tue
SW winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 9 ft. A chance of showers in the morning, then showers likely in the afternoon.
Tue Night
W winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft. A chance of showers.
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ABOUT THIS FORECAST

Last Update: 1158 PM EST Thu Dec 5 2019
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