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Flash Flood Watch

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August 21, 2012 03:57PM
FLOOD WATCH...UPDATED
NATIONAL WEATHER SERVICE SAN DIEGO CA
907 AM PDT TUE AUG 21 2012

...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...

.THIS FLASH FLOOD WATCH TAKES THE PLACE OF THE FLOOD WATCH THAT
WAS ISSUED AT 739 AM THIS MORNING...NO OTHER CHANGES WERE MADE.

DISCUSSION FOLLOWS...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 CHANCE 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.

CAZ055-056-058-060>062-220015-
/O.CAN.KSGX.FA.A.0001.120821T1700Z-120822T0300Z/
/O.NEW.KSGX.FF.A.0010.120821T1700Z-120822T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS-
SAN DIEGO COUNTY MOUNTAINS-APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
907 AM PDT TUE AUG 21 2012

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM PDT THIS EVENING...
...FLOOD WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* FLASH 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.

* UNTIL 8 PM PDT 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.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD
TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION.

YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION
SHOULD FLASH FLOOD WARNINGS BE ISSUED.

&&

THE FLOOD WATCH FOR A PORTION OF SOUTHWEST CALIFORNIA HAS BEEN
CANCELLED. IT WAS ISSUED IN ERROR. THIS FLASH FLOOD WATCH TAKES
ITS PLACE.

$$

BALFOUR
SubjectAuthorViewsPosted

Flash Flood Watch

Rick1303August 21, 2012 03:57PM



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