4:30 p.m. UPDATE: Much of the rain over Mt. Charleston has died out. The storm cell just east of Lake Mead appears to be weakening. The cells over the McCullough Range south of Henderson are the strongest cells near the valley, but appear to be weakening. The NWS flash flood advisory for the entire region remains active until 9 p.m. Monday.
4:10 p.m. UPDATE: A strong storm cell is approaching Lake Mead from the Arizona side. The line of storms along the McCullough Range remains moderate and slowly moving northward. There is light raining covering the northern half of the valley and some strong cells near Primm on the Nevada-California state line.
4 p.m. UPDATE: Light rain is falling over most of Las Vegas proper. The only heavier cell is south of Henderson over the McCullough Range.
3:50 p.m. UPDATE: Clark County’s Fire and Public Works Departments report that the road into the Rainbow subdivision, Rainbow Canyon Boulevard, off Kyle Canyon Road SR 157, is washed out and impassable due to water and mud flow. The road and utility lines have been damaged. Public Works is assessing the damage to determine what repair works need to be done to establish at least partial access to the subdivision. The attached video shows the flooding that washed out the road this afternoon. More information will be provided as soon as a more complete assessment can be made.
3:15 p.m. UPDATE: A heavy rain cell has developed over Henderson. Similar cells are located south over the McCullough Range and could be moving into the southern end of the valley shortly. There are also moderate to heavy storm cells along U.S. 95 about 20 miles northwest of Las Vegas and one on the west side of the Spring Mountains.
2:50 p.m. UPDATE: There is light rain across the southern end of the valley and south. There is also light rain over Mt. Charleston. A few small heavier cells are near Sloan south toward Jean over the mountains. The flash flood warning for extreme south-central Nye and West-central Clark counties expired at 2:45 p.m. The flood advisory for the Las Vegas Valley remains in affect until 9 p.m.
1 p.m. UPDATE: The NWS said a trained weather observer reported flash flooding in Rainbow Canyon subdivision in Kyle Canyon. Debris five feet deep was observed running down a road. Thunderstorms have moved out of the area but runoff will continue from the earlier heavy rain. Further storm development is also possible," stated an alert from the NWS.
12:40 p.m. UPDATE: The major storm dropping rain over Mt. Charleston is headed straight north and is going to be over U.S. 95 northwest of Las Vegas soon. Another currently smaller cell is moving north from the California state line east of Pahrump and should arrive over Mt. Charleston within an hour.
12:25 p.m. UPDATE: The NWS says rainfall rates have been increasing in the Mt. Charleston area, leading to the "potential for catastrophic flooding in Rainbow Canyon." The NWS is urging no travel in the area. Motorists are asked to leave roads open for emergency operations. "This is a life-threatening situation," The NWS said in its warning. "Many roadways are impassable due to flash flooding." This is a flash flood emergency for extreme south-central Nye and West-central Clark counties.
Noon UPDATE: Traffic is being diverted to State Route 158 because of the closure of 157. Flooding is likely to reach northwest Las Vegas by 2 p.m. There is a flood advisory for the entire Las Vegas Valley effective until 9 p.m. The Las Vegas Fire Department reports that it is sending two extra units to the Mt. Charleston fire station in case they are needed.
11:30 a.m. UPDATE: The Nevada State patrol reports that State Route 157 has been closed at Rainbow Canyon Road because of heavy debris and flooding on the road.
LAS VEGAS (KSNV MyNews3.com) -- The National Weather Service has issued a flash flood warning for west central Clark County and extreme south central Nye County until 2:45 p.m. Monday.
At 10:46 a.m., radar showed flash flooding from a thunderstorm near Fletcher View Campground near Mt. Charleston. The storm was nearly stationary over the Carpenter One burn area.
Affected locations may include Mt. Charleston and Floyd Lamb State Park. In addition, the following campgrounds could receive rain and flooding: Fletcher View, Kyle Canyon, Mary Jane Falls, Hilltop, Mahogany, Dolomite and McWilliams. Rainbow Canyon may also be affected.
Heavy rain is falling on the Carpenter one burn area. Water levels are expected to rise very rapidly, leading to mud and debris flows in and downstream of the burn area.
Flash flooding is expected in washes, low water crossings and on roads.
The NWS advises to more to higher ground and do not try to enter a flooded road or a flood channel.