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Summer Showers Prompt Flash Flood Watches

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LOS ANGELES (KTLA) — Showers and scattered thunderstorms were expected across the Southland on Monday, prompting flash flood watches for several areas.

A monsoonal air mass in place across the region will bring thunderstorms mainly over the mountains, deserts and inland valleys, according to the National Weather Service.


Heavy rain caused flooding in Lancaster overnight.

The NWS issued a flash flood watch through 9 p.m. Monday for the mountains of San Bernardino, Riverside and San Diego counties.

A flash flood watch was issued from noon through Monday evening for the Los Angeles and Ventura County mountains, as well as the Antelope Valley.

Locally heavy rainfall and gusty winds were possible, forecasters said.

Some showers, with a chance of thunderstorms, could cross into coastal areas at times, according to the NWS.

Drying was expected to begin on Tuesday, with scattered thunderstorms in the afternoon and early evening for the mountains and deserts.

Warmer and drier weather was forecast for Wednesday and Thursday.

Toward the end of the week and into the weekend, monsoonal moisture could return, along with scattered thunderstorms.

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