The National Weather Service has issued a Flash Flood Watch for Reston, Fairfax County and most of the Washington, DC, area for Wednesday night through Friday morning.
A front heading here from the Great Lakes is expected to dump several inches of rain. Here is the forecast:
AN UPPER LEVEL LOW PRESSURE OVER THE WESTERN GREAT LAKES WILL DROP SOUTHWARD INTO THE OHIO VALLEY WEDNESDAY INTO THURSDAY. AS THE UPPER LOW DROPS SOUTHWARD…
PERIODS OF HEAVY RAINFALL ARE ANTICIPATED LATE WEDNESDAY NIGHT THROUGH THURSDAY NIGHT ACROSS THE CENTRAL MID-ATLANTIC. THE PERIOD OF GREATEST
RAIN RATES IS EXPECTED LATE WEDNESDAY NIGHT THROUGH THURSDAY AFTERNOON.
WIDESPREAD RAINFALL AMOUNTS OF 3 TO 5 INCHES ARE EXPECTED WITH LOCALIZED HIGHER TOTALS IN AREAS OF REPEATED ACTIVITY.
* POTENTIAL EXISTS FOR FLASH FLOODING OF SMALL STREAMS…CREEKS AND URBAN AREAS ESPECIALLY IN AREAS OF REPEATED ACTIVITY.
A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED.