Updated: 11:35 PM EDT on May 22, 2012 at Manassas, Virginia(KHEF)
Current forecast
Issued by the National Weather Service at 11:45 PM EDT on May 22, 2012
Scattered to numerous showers and thunderstorms will spread into the western suburbs of Baltimore and Washington after midnight before moving to the I-95 corridor by 1 am. A brief shower is possible until then. Rain amounts could average one tenth to one quarter of an inch with locally higher amounts.
Overcast with a chance of rain, then thunderstorms and rain showers in the afternoon. High of 79F. Winds less than 5 mph. Chance of rain 60%.
Tuesday Night
Overcast with thunderstorms and rain showers, then a chance of a thunderstorm and a chance of rain after midnight. Low of 64F. Winds less than 5 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.
Wednesday
Mostly cloudy with a chance of a thunderstorm and a chance of rain, then thunderstorms and rain showers in the afternoon. High of 79F. Winds less than 5 mph. Chance of rain 70% with rainfall amounts near 0.3 in. possible.
Wednesday Night
Partly cloudy with a chance of a thunderstorm and a chance of rain in the evening, then mostly cloudy with a chance of rain. Low of 63F. Winds from the ESE at 5 to 10 mph. Chance of rain 30%.
Thursday
Mostly cloudy with a chance of rain in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 82F. Winds from the South at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.
Thursday Night
Partly cloudy with a chance of a thunderstorm and a chance of rain in the evening, then mostly cloudy with a chance of rain. Low of 64F. Winds less than 5 mph. Chance of rain 30%.
Friday
Mostly cloudy with a chance of a thunderstorm and a chance of rain in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 86F. Winds from the South at 5 to 10 mph. Chance of rain 20%.
Friday Night
Partly cloudy in the evening, then mostly cloudy. Fog overnight. Low of 64F. Winds from the SW at 5 to 10 mph.
Saturday
Clear in the morning, then partly cloudy. High of 88F. Winds from the NNE at 5 to 10 mph shifting to the East in the afternoon.
Saturday Night
Partly cloudy with a chance of a thunderstorm and rain after midnight. Fog overnight. Low of 68F. Winds from the South at 5 to 10 mph. Chance of rain 20%.
Sunday
Mostly cloudy with a chance of a thunderstorm and rain in the afternoon. Fog early. High of 88F with a heat index of 95F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.
Sunday Night
Partly cloudy. Fog overnight. Low of 68F. Winds from the SSW at 5 to 10 mph.
Monday
Partly cloudy. High of 91F with a heat index of 99F. Winds from the SSW at 5 to 10 mph.
Monday Night
Partly cloudy. Low of 66F. Winds from the SSW at 5 to 10 mph.
Tuesday
Partly cloudy with a chance of a thunderstorm. High of 84F. Winds from the SW at 10 to 15 mph. Chance of rain 40%.
Tuesday Night
Partly cloudy with a chance of a thunderstorm. Low of 66F. Winds from the SW at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.5 in. possible.
Wednesday
Mostly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 40%.
Wednesday Night
Mostly cloudy with a chance of rain. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Thursday
Partly cloudy. High of 79F. Winds less than 5 mph.
Thursday Night
Partly cloudy with a chance of rain. Low of 61F. Winds less than 5 mph. Chance of rain 20%.
Friday
Mostly cloudy with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 40%.
Friday Night
Mostly cloudy with a chance of a thunderstorm. Low of 61F. Winds less than 5 mph. Chance of rain 40%.
Saturday
Clear with a chance of a thunderstorm. High of 82F with a heat index of 91F. Winds less than 5 mph. Chance of rain 20%.
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... Flash Flood Watch in effect until 6 am EDT Wednesday...
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Watch for portions of northern Virginia and the extreme eastern Panhandle of West Virginia... including the following areas... in Virginia... Clarke... Loudoun... northern Fauquier... Prince William/Manassas/Manassas Park and southern Fauquier. In northeast West Virginia... Jefferson.
* Until 6 am EDT Wednesday
* showers and thunderstorms will move into the extreme eastern Panhandle of West Virginia and northern Virginia late this evening and overnight. Locally heavy downpours will be possible over the same locations that received heavy rainfall on Monday night. Consequently... it will only take an inch or less of rainfall in an hour to produce flash flooding.
* This rainfall could cause the same creeks and streams that flooded last night to rise out of their banks.
Precautionary/preparedness actions...
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.
Flash Flood Watch