 This is Washington's news, traffic, and weather station, WTOP. WTOP News. Again, that severe thunderstorm warning for north central, or check that, northwestern St. Mary's County, central Calvert County, southeastern Prince George's County, and east central Charles County in southern Maryland until 9 o'clock tonight for a particularly destructive storm in that area. If you are outside, don't be outside. Get inside and take cover as quickly as you can.