Weather Alert Detail

Flood Watch for Coachella Valley County, California
Flood Watch issued August 21 at 7:39AM PDT until August 21 at 8:00PM PDT by NWS
Effective: Tuesday, August 21, 2012 at 7:39 a.m.
Expires: Tuesday, August 21, 2012 at 3:45 p.m.
...FLASH FLOOD WATCH IN EFFECT FOR THE MOUNTAINS AND DESERTS OF
SOUTHWEST CALIFORNIA FROM 10 AM PDT THIS MORNING THROUGH 8 PM PDT
THIS EVENING...
.INCREASE IN MOISTURE AND INSTABILITY DURING PAST 12 HOURS POINTS
TO MODERATE TO HIGH FLASH FLOOD THREAT OVER MOUNTAINS AND DESERTS
FROM LATE MORNING THROUGH THIS EVENING. THERE IS A SLIGHT CH ACNE
THAT THUNDERSTORMS MAY CONTINUE OVERNIGHT...MAINLY OVER SAN
BERNARDINO COUNTY MOUNTAINS AND DESERTS. SHOULD THIS THREAT
INCREASE...THE FLASH FLOOD WATCH WILL BE EXTENDED BEYOND 8 PM.
...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A
* FLOOD WATCH FOR A PORTION OF SOUTHWEST CALIFORNIA...INCLUDING
THE FOLLOWING AREAS...APPLE AND LUCERNE VALLEYS...COACHELLA
VALLEY...RIVERSIDE COUNTY MOUNTAINS...SAN BERNARDINO COUNTY
MOUNTAINS...SAN DIEGO COUNTY DESERTS AND SAN DIEGO COUNTY
MOUNTAINS.
* FROM 10 AM THIS MORNING THROUGH 8 PM THIS EVENING
* EXCESSIVE RUNOFF FROM HEAVY DOWNPOURS MAY CAUSE RAPID FILLING
AND OVERFLOWING OF NORMALLY DRY WASHES...CREEKS...SMALL
STREAMS...AND LOW LYING AREAS.
* IN ADDITION THERE IS A THREAT OF ROCK AND MUD SLIDES BELOW STEEP
TERRAIN IN THE MOUNTAINS AND RECENTLY BURNED AREAS.

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