A wet storm system moved across the area in the past 24 hours. The heaviest rains have been south of Baltimore. The two maps below are derived from radar estimates of rainfall up until 11:00am Friday, May 9.
In both views above, the blue shades indicate rainfall up to 1 inch … the light green shades up to 2 inches … the dark green shades 2-4 inches … and the yellow to red shades 4-6 inches. These are, of course, estimates based on computations from the NEXRAD Radar system but seem to verify fairly closely with a few ground based measurements.
The heaviest bands of rain run from Cecil County, southwestward to just south of BWI-Marshall Airport and Washington DC and on into Virginia. This alignment coincides with the path of strong thunderstorm activity which tracked out of Virginia into Anne Arundel County overnight. Numerous flooding reports came out of Virginia. Winds from thunderstorms took down trees in Charles County, put a tree into a house in Ft. Washington in Prince Georges County and produced roof and trailer damage at the foot of the Bay Bridge in Anne Arundel County.
A National Weather Service Storm Survey Team today confirmed an EF-2 tornado near Berea in Stafford County, Virginia. It struck at 10:55pm Thursday. It produced a 4 mile long, 150 yard wide path and damaged numerous structures. An EF-2 tornado generates winds ranging from 86-110 mph.
The Survey Team also confirmed a tornado touchdown in Prince Georges County at Camp Springs. The touchdown was reported at 1:02am Friday around the Town Center subdivision and the Regency Park Townhome subdivision in Suitland. Damage was 100-200 yards wide and sporadic. The preliminary storm rating is EF-0 with winds estimated at 65-85 mph.
As of 3:00pm Friday, the storm has produced 1.68 inches of rain on TV Hill. The biggest rain numbers in Maryland come from Prince Georges County. As of 7:21 am Friday, Ft Washington had received 3.76 inches of rain.
More rain is on the way. A weather disturbance will increase the chances for rain showers on Saturday and a much stronger storm is expected to come in late Sunday. Check out the details with Tom tonight at 5, 6 and 11pm. I’ll be tracking the storms all weekend.