Locally Heavy Rainfall Possible Over the Four Corners; Critical Fire Weather Conditions in the Great Basin

Monsoon moisture will result in locally heavy showers and thunderstorms over the Four Corners region, which could lead to flash flooding. While, critical fire weather threats are expected for much of the Great Basin, from dry and windy conditions. Finally, Tropical Cyclone Humberto remains well offshore of the Southeast, but rip currents and heavy surf are expected from Florida to the Carolinas.
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Last Update: 329 PM EDT Sun Sep 15 2019

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Philadelphia, PA Local Forecast Office

31NM SSE New York NY

Marine Zone Forecast


Synopsis: A weak cold front will stall near Delmarva through Monday while high pressure weakens to our southwest. A weak area of low pressure slides near our region on Monday. High pressure builds across the Northeast Tuesday into Wednesday, then shifts southward across the Mid-Atlantic region Thursday. The high is forecast to shift to our south Friday, then offshore next weekend.

Tonight
SW winds 5 to 10 kt, becoming W after midnight. Seas around 3 ft. Swell mainly from the SE with a dominant period of 7 seconds.
Mon
W winds around 5 kt, becoming S in the afternoon. Seas around 3 ft. Swell mainly from the SE with a dominant period of 7 seconds.
Mon Night
SE winds 5 to 10 kt, becoming NE in the late evening and early morning, then increasing to 10 to 15 kt with gusts up to 20 kt late. Seas around 3 ft early in the evening, then 2 ft or less, then 3 to 4 ft in the late evening and overnight. Swell mainly from the SE with a dominant period of 7 seconds.
Tue
NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Swell mainly from the E with a dominant period of 6 seconds.
Tue Night
E winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 3 to 5 ft.
Wed
NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft.
Wed Night
E winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 6 ft.
Thu
NE winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 4 to 6 ft.
Thu Night
NE winds 5 to 10 kt. Seas 3 to 5 ft.
Fri
N winds 5 to 10 kt. Seas 3 to 5 ft.
Fri Night
W winds 5 to 10 kt, becoming NW after midnight. Seas 4 to 6 ft.
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ABOUT THIS FORECAST

Last Update: 329 PM EDT Sun Sep 15 2019
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