Monday, Sept. 10, 2012 | 11:08 a.m.
The National Weather Service has issued a flash flood watch as thunderstorms may develop in the Las Vegas Valley.
The watch is in effect until 4 a.m. Tuesday, said Jim Harrison, a meteorologist for the National Weather Service.
The watch covers Southern Nevada, including Clark County, the Lake Mead National Recreation Area and Nye County.
There is a 50 to 60 percent chance of thunderstorms in the valley, and some areas could see 1 or 2 inches of rain, Harrison said.
Storms may develop in the early afternoon, meteorologist Andrew Gorelow said.
Harrison advises drivers to be alert and avoid flooded roads or washes.