LOS ANGELES (CNS) – Thunderstorms may drench areas of the San Gabriel Mountains and Antelope Valley today, raising fears of flash flooding, National Weather Service forecasters said.
The thunderstorms could occur this afternoon and this evening as a result of moist and unstable conditions, according to an NWS advisory.
“The moisture content through the mid and upper levels of the atmosphere remains rather high, so any thunderstorm that develops today may produce heavy rainfall in the mountains and deserts,” it said.
“Due to the very weak winds aloft, storms will be slow-moving, which will increase the potential for heavy rainfall totals and associated flash flooding.”
Forecasters said runoff from heavy downpours could cause small creeks and normally dry washes to overflow and trigger rock and mud slides near foothills.
A flash flood watch will be in effect in the Antelope Valley and the San Gabriels in both Los Angeles and Ventura counties from noon through this evening.
The NWS forecast highs today of 77 in Avalon; 79 in Newport Beach; 80 at LAX; 85 in Long Beach; 87 in downtown L.A.; 89 in San Gabriel; 91 in Anaheim and Burbank; 93 in Pasadena; 95 in Palmdale; 96 in Woodland Hills; and 97 in Saugus and Lancaster.
A cooling trend is expected Tuesday and Wednesday before temperatures climb back up Thursday.
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