UPDATE at 10:48 p.m.: An estimated 10 to 12 inches of water was flowing over the Blue Diamond and South Durango intersection.
UPDATE at 10:27 p.m.: A flood advisory for the Red Rock Canyon areas has been extended until 1 a.m.
UPDATE at 10:20 p.m.: Heavy storms were moving across Interstate 15 about 10:15 p.m. several miles north of North Las Vegas and are moving west. They may cause heavy rain north of the Las Vegas Valley and could affect I-215 that runs east-west across the north end of the valley and I-15.
LAS VEGAS (KSNV MyNews3.com) -- A flash flood warning as been issued for much of the southwest side of the Las Vegas Valley by the national Weather Service.
The warning was scheduled to expire at 11:15 p.m.
At 9:18 p.m., NWS radar indicated flash flooding from a thunderstorm near Rhodes Ranch, about 11 miles southeast of Red Rock Canyon.
The storm was nearly stationary and estimates are that it was producing upward of an inch of rain in 30 minutes.
Areas that will be affected include Rhodes Ranch, Wet n Wild, Durango south of Interstate 215, Blue Diamond Road, Mountain's Edge and other areas of southwest Las Vegas.
Flash flooding can be expected on roads, normally dry washes and low areas. Never try to cross a flooded road or enter a flood channel.
Reporting flooding to the Las Vegas National Weather Service via Facebook or Twitter.