Time to break out the umbrellas, boots and inflatable rafts: A long-lasting rainstorm is expected to hit D.C. this (Friday) afternoon, bringing several inches of rain and flooding across the region.

The National Weather Service issued a flash flood watch from Friday afternoon through Saturday afternoon, as widespread showers bring 3 or more inches of rain. Isolated severe thunderstorms and high winds may also knock down trees and power lines.

Treat blacked-out stoplights as a four-way stop, use turn signals to communicate your intentions and avoid driving through flooded areas. Just a few inches of water have been known to sweep vehicles away.

Meantime, heed the warnings from VDOT below about driving in the rain.