The following events were reported: Flash Flood, Flood. These occurred near station USW00013743, approximately 29.5051 km away, between 2011-09-07 11:13:00 and 2011-09-08 21:00:00. The flood was caused by Heavy Rain. Thankfully, no injuries or fatalities were reported. No significant property or crop damage was reported. Episode Narrative: Abnormally moist atmosphere across the mid-Atlantic allowed showers and thunderstorms to produce exceptional rainfall rates across portions of Maryland as the remnants of Tropical Depression Lee interacted with a nearly stationary boundary near the Mason-Dixon line. Major flooding and flash flooding occurred in numerous areas. The highest rainfall and worst flooding happened in a band from Charles County northeastward into Baltimore County. The highest measured rainfall report during this period was 10.70 inches in Anne Arundel County. Abnormally moist atmosphere across the mid-Atlantic allowed showers and thunderstorms to produce exceptional rainfall rates across portions of Maryland as the remnants of Tropical Depression Lee interacted with a nearly stationary boundary near the Mason-Dixon line. Event Narrative: Beach Drive was closed due to flash flooding. A nearby spotter observed 8.50 inches of rain. Port Tobacco Road was closed at Wards Run due to flash flooding. Many roads were closed throughout the county due to flash flooding. A number of sinkholes were also reported. Route 225 was flooded and closed near Route 224. A nearby rain gauge tallied 6.13 inches. High water was blocking lanes of the Route 50, 201, and 295 interchange. A nearby spotter observed 4.64 inches of rain. Water Street was closed north of Route 4 due to flooding. A nearby rain gauge totalled 4.63 inches. Numerous roadways were closed due to flash flooding in Waldorf and across Charles County. A spotter in Waldorf measured 8.71 inches of rain. Route 301 was closed at Route 6 due to flash flooding. A nearby rain gauge tallied a storm total of 7.83 inches. Mattaponi Creek flash flood forced the closure of Croom Road at Mattaponi Road. The spotter that observed the event recorded 6.20 inches. Route 301 was closed at Chapel Point Road due to flash flooding. A rain gauge in the area recorded 6.91 inches. Route 227 West was closed at Ray Drive due to flash flooding. A nearby spotter reported 5.84 inches of rain. Route 4 at Woodyard Road was closed due to flash flooding. A nearby rain gauge tallied 6.72 inches. Numerous high water rescues were ongoing across Waldorf and surrounding areas. Chesapeake Avenue was closed between 3rd and 4th Streets due to flash flooding. A nearby spotter measured 4.68 inches of rain. Route 261 was closed at Summer City Boulevard due to flash flooding. A rain gauge near the event observed 4.67 inches. Fishers Station Road was closed due to flooding at Route 4. A portion of the outer loop of the Capital Beltway was flooded near Exit 19. A nearby rain gauge measured 4.76 inches. Route 202 was closed at White House Road due to flash flooding. A rainfall amount of 4.30 inches was reported near the event. Maryland Route 725 was flooded and closed at John Rogers Boulevard due to floodwaters at the confluence of Western Branch and Collington Branch. A nearby rain gauge reportedly measured 4.58 inches. The turn lane on Route 5 onto Surratts Road was closed due to flash flooding. A nearby rain gauge recorded 4.57 inches. Port Tobacco Road was closed between Rose Hill and Valley Roads.