Hour-By-Hour Halloween Forecast For Northern Virginia, DC

WASHINGTON, DC — A storm system expected to move into the area on Halloween could come with thunderstorms and strong winds of up to 25 mph, the National Weather Service said in its forecast on Thursday. The agency issued a hazardous weather outlook because severe thunderstorms with damaging wind gusts are possible with a strong cold front this evening. An isolated tornado is also possible.

"Heavy rainfall may lead to scattered instances of flooding this evening," the Weather Service added.

As of Wednesday afternoon, the Weather Service says an inch of rain will fall by sunrise Thursday. Halloween will be mostly cloudy and breezy with rain showers that will taper off in the afternoon. Showers are most likely after 3 p.m. Thursday, with thunderstorms possible Thursday afternoon and evening, bringing chances for damaging winds and heavy rainfall.

Areas in the hazardous weather outlook include: the District of Columbia, Prince William, Manassas, Manassas Park, Fairfax, Arlington, Falls Church, Alexandria, Stafford and Spotsylvania.

Here is the hour-by-hour forecast for the Washington, D.C., region, according to the National Weather Service:

1 p.m. - Rain, 33 percent chance
2 p.m. - Rain, 15 percent chance
3 p.m. - Rain, 15 percent chance
4 p.m. - Strong winds, 15 percent chance
5 p.m. - Gusty winds, rain, 24 percent chance
6 p.m. - Gusty winds, rain, 24 percent chance
7 p.m. - Gusty winds, rain, 24 percent chance
8 p.m. - Scattered storms, 100 percent chance
9 p.m. - Scattered storms, 100 percent chance

10 p.m. - Scattered storms, 100 percent chance

And the forecast through the weekend:

Thursday Afternoon: Scattered showers before 2pm, then isolated showers after 5pm. Cloudy, with a high near 77. South wind around 16 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

Thursday Night: Showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 2am. Some storms could be severe, with damaging winds and heavy rain. Low around 44. Breezy, with a south wind 14 to 22 mph becoming west in the evening. Winds could gust as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Friday: Sunny, with a high near 56. Northwest wind 10 to 14 mph, with gusts as high as 26 mph.

Friday Night: Mostly clear, with a low around 37. Northwest wind around 6 mph becoming calm after midnight.

Saturday: Sunny, with a high near 57.

Saturday Night: Mostly clear, with a low around 39.

Sunday: Sunny, with a high near 53.

Sunday Night: Mostly clear, with a low around 36.