UPDATED: Tornado Warning, Severe Thunderstorm Watch, Flash Flood Watch Saturday

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Photo of Broad Run flooded along Linton Hall Road and Sudley Manor Drive during a previous storm.  Photo of Broad Run flooded along Linton Hall Road and Sudley Manor Drive during a storm in 2013.

Updated: June 20, 7:15  p.m.

The National Weather Service has issued a Severe Thunderstorm Watch for the entire area until 11 p.m. Saturday.

"The main threat is damaging winds,"the NWS said. "There are also threats for large hail and the threat for tornadoes will increase this evening."

As of 7:05 p.m. Doppler radar indicated a severe thunderstorm capable of producing a tornado; a Tornado Warning was issued for western Prince William County until 8 p.m.

Original Story:

The National Weather Service is warning residents of some severe weather that may impact the coverage area beginning Friday night.

According to the NWS, as of 7: 50 p.m. Friday, a line of strong thunderstorms was reported along a line extending from near Linton Hall to near Bealeton and moving east at 30 mph.

"Winds in excess of 40 mph are possible with these storms," they said. "Torrential rainfall is also occurring with this shower and well cause ponding of water on roadways."

The NWS also issued a Flash Flood Watch ahead of storms from Tropical Depression Bill for Saturday evening through Sunday morning.

"Showers and thunderstorms will increase in coverage from west to east late Saturday afternoon and continue into Sunday morning," forecasters said. "Some of the storms will contain torrential downpours, which could lead to flash flooding."

NWS expects widespread rainfall amounts of one to three inches locally with higher amounts possible.

"Rainfall rates of one to two inches per hour could occur with the strongest thunderstorms," they said.

Heavy rainfall in short periods of time could cause rapid rises on creeks and streams and flash flooding are possible.

Bristow Weatherman John Biggs discusses these storms in his latest Weather Beat.

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