5:50 p.m. update: Stronger storm cells are located across Interstate 40 and a bit northward. They are headed slowly north and could affect the Las Vegas Valley sometime this evening.
4:55 p.m. update: Some forecast maps show light rain entering the Las Vegas Valley from the southern end as early as 6 p.m. Sunday. Rain is expected to be light, but may fall on many parts of the valley during the evening and into Monday morning.
4:30 p.m. update: The NWS has issued a flood warning for extreme south-central Clark County and central Mohave County in northwest Arizona effective until 7:30 p.m. Radar shows flash flooding from thunderstorms along a line extending from 16 miles north of Diamond M Ranch to 6 miles east of Bullhead City or along a line extending from 42 miles northeast of Kingman to 6 miles east of Bullhead City.
The storms producing flash flooding were moving slowly north. Areas affected include Kingman, Golden Valley, New Kingman-Butler, Valentine, Oatman, Riverside Adventure RV Park, Blake Ranch RV Park, Diamond M Ranch and Hualapai Mountain Park. This includes interstate 40 in Arizona between mile markers 38 and 93.
1:30 p.m. update: Metro has 11 accidents it is handling with five of them involving injuries.
1:25 p.m. update: Much of the light rain is moving north through the valley, leaving the southern half without rain. Light rain clouds are heading north over the Sheep and Spring mountain ranges to the north and west of the valley. Some moderate cells are developing over Bullhead City and Lake Havasu, Ariz., and are slowly moving north.
1:10 p.m. update: The Nevada Highway Patrol was handling nearly 30 accidents on valley roadways starting about 11 a.m. Most of them were property damage situations, but at least five injury accidents were reported.
LAS VEGAS (KSNV MyNews3.com) -- The predicted rain that reached the Las Vegas Valley about noon Sunday is causing dozens of traffic issues on the valley's roads.
Light showers cover nearly all of the valley, Boulder City and Lake Mead.
No major flooding issues have been reported.
A flash flood watch is in effect until 10 p.m., according to the National Weather Service.