Strong Storms for Midwest; Very Active Weather Pattern for West

Strong thunderstorms with isolated severe hail are possible today across northern Iowa and southern Minnesota today. Otherwise, a very active and wet weather pattern is expected through early next week for the West Coast and Western U.S. A number of Pacific storm systems will deliver enhanced and excessive rainfall along with mountain snow.
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Hazardous Weather Conditions

Last Update: 702 AM EDT Wed Oct 20 2021

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Philadelphia, PA Local Forecast Office

31NM SSE New York NY

Marine Zone Forecast


Synopsis: High pressure will remain centered across the Southeast through the day before shifting offshore tonight as low pressure moves into the Great Lakes. A cold front will move through the region in association with this surface low Thursday night. High pressure will build across the Mid-Atlantic through the weekend with a series of upper-level disturbances moving through as well. Another area of low pressure looks to move into the region by early next week.

Today
W winds 10 to 15 kt with gusts up to 25 kt. Seas around 3 ft this morning, then 2 ft or less. Swell mainly from the NW with a dominant period of 4 seconds.
Tonight
W winds around 10 kt. Gusts up to 20 kt late in the evening. Seas 2 ft or less. Swell mainly from the SW with a dominant period of 3 seconds.
Thu
SW winds around 10 kt, becoming S early in the afternoon, then increasing to 15 to 20 kt late. Seas 2 ft or less, then around 3 ft in the afternoon. Swell mainly from the SW with a dominant period of 4 seconds.
Thu Night
SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Swell mainly from the S with a dominant period of 6 seconds.
Fri
W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Seas 3 to 4 ft.
Fri Night
NW winds around 10 kt, becoming N after midnight. Seas around 3 ft.
Sat
N winds 5 to 10 kt. Seas around 3 ft in the morning, then 2 ft or less. A chance of showers.
Sat Night
NW winds 10 to 15 kt. Seas around 3 ft.
Sun
NW winds 10 to 15 kt. Seas around 3 ft.
Sun Night
NW winds 10 to 15 kt. Seas around 3 ft. A chance of showers after midnight.
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ABOUT THIS FORECAST

Last Update: 702 AM EDT Wed Oct 20 2021
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