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First Warning Forecast: Clearing out after Isaias

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Posted at 5:52 AM, Aug 03, 2020
and last updated 2020-08-04 11:48:28-04

First Warning Forecast

Conditions are improving today after a long night of tornado warnings...

Isaias leaves behind a path of destruction across parts of the area where tornadoes touched down. There were numerous reports of tornadoes with several of them being confirmed by law enforcement. The worst of Isaias is behind us, so plan on isolated rain chances this afternoon as many survey the damage caused by the tropical storm. River flooding may become a concern by late after all the rainfall to our north will flow downstream... Minor to moderate flood stage are possible.

Looking ahead, highs near 90 Wednesday with a slight chance for showers and storms and higher chances Thursday with similar temperatures. Trending into the mid/upper 80s this weekend, but afternoon storm chances are possible both Saturday and Sunday.

Tropical Update

Isaias continues to move up north after dumping heavy rain along the I-95 corridor. The storm moved swiftly through the mid-Atlantic toward the north-northeast near 35 mph. On the forecast track, the center of Isaias will continue to move along the coast and into the northeast southern Canada tonight. Radar detected maximum sustained winds near 70 mph. It's expected to weaken tonight or Wednesday to a post-tropical system.

Tropical-storm-force winds extend outward up to 140 miles from the center. During the past hour, a sustained wind of 55 mph with with a 65 mph gust were reported at Ocean City, Maryland. A sustained wind of 45 mph, and a gust to 57 mph were reported at Ocean City-South Beach, New Jersey.

Disturbance 1:
A disturbance is slowly beginning to weaken in the Atlantic about 300 miles south-southwest of Bermuda. The weak area of low pressure once had a decent chance of forming over the next five days, but it has since taken on dry air, which decreases the chance for further development. This system is forecast to move NW at about 10 mph then stall before drifting southwestward by late week.

* Formation chance through 48 hours: Medium (30%)

* Formation chance through 5 days: Medium (30%)