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Storm to Bring Mid-Atlantic Severe, Northeast Snow

13 Apr 2021, 1:00 pm

An area of low pressure and its extending cold front will work its way across the south this week, bringing the threat for severe weather and flooding to the Gulf Coast. As that low moves into the Mid-Atlantic midweek, we could see a few strong to severe storms Wednesday. From there, the low will progress into the northeast and team up with another wave of energy from the Great Lakes. As these two systems interact, rain and snow will return to the forecast.

Wednesday Mid-Atlantic Severe

Southerly flow building through the day on Wednesday will enhance warmth, moisture and instability through the Carolinas. A period of clear skies in the morning will also help destabilize the atmosphere and lead to a Marginal risk of severe storms from the Storm Prediction Center.

Storms will begin building along a cold front in Virginia early in the day. But the stronger storms are more likely as the center of low pressure pulls northeast into North Carolina for the late afternoon. A few thunderstorms will produce small hail and gusty winds.


Northeast Rain & Snow

By Thursday, the low from the Mid-Atlantic will begin pushing into the northeast. At the same time, a trough of low pressure through the depth of the atmosphere will slowly move across the Great Lakes. This system is generally cooler, and will help drop temperatures low enough for snow potential.

During the daytime, temperatures will be warm enough for mainly rain. As the trough spins, rain will very slowly build from southwest to northeast on Thursday. As temperatures drop on Thursday evening, especially at elevation, rain will turn into a wet slushy snow. The bulk of any snow that will fall will happen overnight Thursday into early Friday morning. The surface low will finally start moving east Friday afternoon, with precipitation ending from West to East Friday night.

Accumulations this time of year are tough to pin down. Models are likely overdoing the snow potential for several reasons. Temperatures near freezing allow for more moisture, and therefore the potential for more snow. There are several factors working against accumulation, though. Warm ground temperatures, temperatures skirting above freezing at times, and wet slushy snow compacting quickly. Regardless, it could be a messy morning commute on Friday.

About the author
Karissa is the Director of On-Air Operations at WeatherNation. Karissa grew up loving math and science, but really fell in love with Meteorology while attending the College of DuPage in Glen Ellyn, Illinois. After two summers of storm chasing in the central plains, she knew that it was the career path for her. Standing in front of a thunderstorm and feeling the cool outflow knock her over was an e... Load Morexperience she will never forget. After two years at COD, she transferred to Metropolitan State University of Denver. Karissa graduated Magna Cum Laude with a Bachelors of Science in Meteorology. Her high school and college speech and meteorology professors were extremely supportive and pushed her to succeed. Before joining the WeatherNation team, she previously worked as the Morning Meteorologist at KCAU-TV in Sioux City, Iowa and at WMBD-TV in Peoria, IL. She recently was part of a National Edward R. Murrow award winning team for breaking news for their coverage of the EF-4 tornado in Washington, Illinois. In her free time, Karissa enjoys cooking and trying new foods. She is a self proclaimed 'TV Junkie' who can get into just about any show. She is a die hard Chicago sports fan who loves attending professional sporting events.