A more active weather pattern is expected to unfold across the Mid Atlantic today as a disturbance moving out of the Great Lakes pushes toward the Ohio Valley and East Coast. Forecasters are monitoring the potential for scattered strong to severe thunderstorms this afternoon and evening, especially across portions of Maryland, Delaware, Virginia, and southern Pennsylvania.
An upper level trough currently swinging southeast through the Great Lakes will help provide the energy needed for thunderstorm development later today. Early morning satellite and water vapor imagery already showed a lead disturbance tracking across southern Ohio into the central Appalachians, helping to spark areas of showers and thunderstorms ahead of the main system.
At the surface, a frontal boundary draped across the region has been reshaped by ongoing morning rainfall and thunderstorms. As this boundary gradually slides southeast through the day, warm and humid air ahead of it will continue building instability across the Mid Atlantic. Dewpoints climbing into the upper 60s and lower 70s will create a very moisture rich atmosphere capable of supporting stronger storms by this afternoon.
Clusters of thunderstorms to develop and move east southeastward later today. The primary threat with the strongest storms will be damaging wind gusts ranging from 50 to 65 mph, capable of bringing down tree limbs and causing isolated power outages. Some of the more intense storm cores may also produce small to marginally severe hail.
While widespread severe weather is not expected, scattered strong storms could become locally intense during the peak heating hours this afternoon into early evening. Residents across the region should stay alert for rapidly changing weather conditions and be prepared for possible severe thunderstorm warnings later today.
In addition to the wind threat, locally heavy rainfall may also accompany stronger storms given the humid environment already in place across the region.
