This weather cam may not be as useful as others because Manassas has so many nice days that you hardly ever have to check the weather. But if you are going to be in the area, here is a webcam to look at anyways.
The camera is located on Mayfield School and is generally pointing N-NE to avoid damage due to sunglare.
Favorite thing: Of course when I was in Manassas they were having the worst temperatures since the Blizzard of the Century in 1996... it was the headline of the week, the EXTREME cold... so I go to Key West and there's a hurricane, go to London and they raise the terror warnings to super-high, go to Manassas and the temperature drops to -30º, what's wrong with me?!?
Favorite thing: the defenses on Henry Hill were slightly better than nothing: behind these wooden fences you had maybe 50% protection against a projectile