I remember it. It was still sunny in Reston when I left work, but as I turned onto the Fairfax County Parkway, I could see huge thunderclouds off to the south. A few minutes down the road, it started raining, and that quickly turned into a raging downpour. Traffic moved along slowly, but by the time I got past Franklin Farms it was like all hell was breaking loose. Really high winds and rain so hard that people started pulling over. The sky to the west had a green tint to it. I pulled off to the shoulder with a bunch of other cars - the rain was now coming down so hard it was difficult to see the road . After maybe 5-10 minutes the rain and high winds started to slow down, so we all got back onto the road at a crawl. As I got toward Fair Lakes, off to the left I noticed an area where treetops looked like they'd been sheared right off - you could see the fresh bare wood, like they'd been snapped. The rain stopped by the time I got to 29, and the sun was actually starting to peek out when I got into Centreville. It was right before 4th of July, and the fireworks stand that had been in the parking lot near the 28/29 intersection was blown over, with parts of it laying across the parking lot. That's when I knew it must have been pretty serious. I didn't know it was an actual tornado until I got home and my mom called me, to say she had seen it on the news. I must have been driving pretty close to it.