Elliot Abrams

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Chill to Retreat by Midweek

May 13, 2013; 6:57 AM ET

Monday 9 a.m.

A strong trough swinging through the Northeast is responsible for the unseasonably chilly air mass now in place. As the trough departs, the flow aloft will change from northwest to westerly. That may not seem like much, but consider this: Northwest of Pennsylvania and New York, temperatures were generally in the 30s this morning. However, across the Dakotas, daybreak temperatures were as high as the 50s. The coming westerly flow will bring that warm air east. This video has more.

Northeast video

On Wednesday, it will feel like summer from Missouri to Virginia, but the warmup will be a bit muted farther north, and the flow on this map shows why. The isobars show a pretty straight show of warm air from Texas to Virginia. However, north of there, the flow bends to become more south to north. The curvature zone is the location of a warm front. North of the front, it is in the process of getting warmer, but it is not as warm there as it is south of the front. Also, north of the front, the action of warm air rising up and over retreating cool air can lead to clouds and showers. The forecast map is for 2 p.m. EDT Wednesday.

The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com


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About This Blog

Elliot Abrams
Elliot Abrams from AccuWeather.com offers this Northeast Weather Blog for the U.S. with regular updates on NE weather from a leading forecaster and meteorologist.