Thursday, just after we left the gym, we saw a huge pile of dark clouds building up to the west, so we headed up Charlston to Red Rock National Conservation Area just in time to see the washes roaring with rusty muddy water and the road closed by flooding. Something like an inch of rain fell in 30 minutes, with even more in the mountains. The result was pouring down the canyons.
Search and Rescue looked for stranded hikers or cars stuck in the mud.
The water eventually runs into a large cache basin at the border of the park, and then down through the Las Vegas Wash.