River Flooding Continues to be a Concern for Multiple Regions across the Country

Recent rainfall has increased the threat of Moderate to Major flooding along rivers in the Mid-Atlantic, especially Virginia and Maryland, over the next few days. Rainfall combined with snowmelt is also fueling Moderate-to-Major flooding in the northern Rockies and northern Intermountain West.
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Last Update: 655 AM EDT Mon May 21 2018

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Philadelphia, PA Local Forecast Office

10NM SE Lewes DE

Marine Zone Forecast


Synopsis: Weak high pressure will build across the area today and into tonight. Low pressure will cross the Great Lakes tonight and then move down the Saint Lawrence Valley Wednesday. Its associated fronts will affect our area through Wednesday. Another high pressure system will arrive over the area for the late week period and persist into Saturday. Another disturbance will arrive for Saturday night and last into Memorial Day.

Today
NE winds 5 to 10 kt. Seas 3 to 4 ft. Swell mainly from the SE with a dominant period of 8 seconds.
Tonight
SE winds 5 to 10 kt. Seas around 3 ft in the evening, then 2 ft or less, then around 3 ft late. Swell mainly from the SE with a dominant period of 8 seconds.
Tue
S winds 5 to 10 kt. Seas 2 ft or less, then around 3 ft in the afternoon. Swell mainly from the SE with a dominant period of 8 seconds. a chance of showers and tstms.
Tue Night
SW winds around 10 kt. Seas around 3 ft. Swell mainly from the SE with a dominant period of 10 seconds. a chance of tstms until early morning. A chance of showers.
Wed
W winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers in the morning.
Wed Night
NW winds 5 to 10 kt. Seas around 3 ft.
Thu
N winds 5 to 10 kt, becoming E in the afternoon. Seas around 3 ft.
Thu Night
S winds 5 to 10 kt, becoming SW after midnight. Seas 2 ft or less.
Fri
SW winds 5 to 10 kt. Seas 2 ft or less.
Fri Night
SW winds 10 to 15 kt. Seas around 3 ft. winds and seas higher in and near tstms.

Winds and seas higher in and near tstms.
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ABOUT THIS FORECAST

Last Update: 655 AM EDT Mon May 21 2018
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