

000 

WGUS56 KSGX 302138

FFWSGX

CAC065-310030-

/O.NEW.KSGX.FF.W.0048.080830T2138Z-080831T0030Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/



BULLETIN - EAS ACTIVATION REQUESTED

FLASH FLOOD WARNING

NATIONAL WEATHER SERVICE SAN DIEGO CA

238 PM PDT SAT AUG 30 2008



THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A



* FLASH FLOOD WARNING FOR...

  SOUTH CENTRAL RIVERSIDE COUNTY IN SOUTHWEST CALIFORNIA...



* UNTIL 530 PM PDT



* AT 233 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   

HEAVY RAIN FROM THUNDERSTORMS IN THE AREA FROM IDYLLWILD TO LAKE 

HEMET. THE STORMS ARE ADEVELOPING SLOWLY SOUTH AT 5 TO 10 MPH. RADAR 

INDICATES THAT 1 TO 2 INCHES OF RAIN PER HOUR MAY BE FALLING. 





* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAGE...

LAKE HEMET...AGUANGA...AND ANZA.



THE WATERSHEDS BURNED THIS FALL ARE PARTICULARLY SUSCEPTIBLE TO FLASH

FLOODS AND DEBRIS FLOWS DURING RAINSTORMS. A SHORT PERIOD OF EVEN

MODERATE RAINFALL ON A BURNED WATERSHED CAN LEAD TO DEBRIS FLOWS.

RAINFALL THAT IS NORMALLY ABSORBED INTO HILLSLOPE SOILS CAN RUN OFF

ALMOST INSTANTLY AFTER VEGETATION HAS BEEN REMOVED BY WILDFIRE. THIS

CAUSES MUCH GREATER AND MORE RAPID RUNOFF THAN IS NORMAL FROM CREEKS

AND DRAINAGE AREAS. THE HIGHLY ERODIBLE SOILS IN A BURN SCAR ALLOW

FLOOD WATERS TO ENTRAIN LARGE AMOUNTS OF ASH, MUD...BOULDERS...AND

UNBURNED VEGETATION. WITHIN THE BURNED AREA AND DOWNSTREAM...THE

FORCE OF RUSHING WATER...SOIL AND ROCK CAN DESTROY CULVERTS...

BRIDGES...ROADWAYS AND BUILDINGS...POTENTIALLY CAUSING INJURY OR

DEATH.



LAT...LON 3370 11696 3372 11665 3343 11647 3344 11692



$$



PURPURA



000 

WGUS56 KSGX 302138

FFWSGX

CAC065-310030-

/O.NEW.KSGX.FF.W.0048.080830T2138Z-080831T0030Z/

/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/



BULLETIN - EAS ACTIVATION REQUESTED

FLASH FLOOD WARNING

NATIONAL WEATHER SERVICE SAN DIEGO CA

238 PM PDT SAT AUG 30 2008



THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A



* FLASH FLOOD WARNING FOR...

  SOUTH CENTRAL RIVERSIDE COUNTY IN SOUTHWEST CALIFORNIA...



* UNTIL 530 PM PDT



* AT 233 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   

HEAVY RAIN FROM THUNDERSTORMS IN THE AREA FROM IDYLLWILD TO LAKE 

HEMET. THE STORMS ARE ADEVELOPING SLOWLY SOUTH AT 5 TO 10 MPH. RADAR 

INDICATES THAT 1 TO 2 INCHES OF RAIN PER HOUR MAY BE FALLING. 





* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAGE...

LAKE HEMET...AGUANGA...AND ANZA.



THE WATERSHEDS BURNED THIS FALL ARE PARTICULARLY SUSCEPTIBLE TO FLASH

FLOODS AND DEBRIS FLOWS DURING RAINSTORMS. A SHORT PERIOD OF EVEN

MODERATE RAINFALL ON A BURNED WATERSHED CAN LEAD TO DEBRIS FLOWS.

RAINFALL THAT IS NORMALLY ABSORBED INTO HILLSLOPE SOILS CAN RUN OFF

ALMOST INSTANTLY AFTER VEGETATION HAS BEEN REMOVED BY WILDFIRE. THIS

CAUSES MUCH GREATER AND MORE RAPID RUNOFF THAN IS NORMAL FROM CREEKS

AND DRAINAGE AREAS. THE HIGHLY ERODIBLE SOILS IN A BURN SCAR ALLOW

FLOOD WATERS TO ENTRAIN LARGE AMOUNTS OF ASH, MUD...BOULDERS...AND

UNBURNED VEGETATION. WITHIN THE BURNED AREA AND DOWNSTREAM...THE

FORCE OF RUSHING WATER...SOIL AND ROCK CAN DESTROY CULVERTS...

BRIDGES...ROADWAYS AND BUILDINGS...POTENTIALLY CAUSING INJURY OR

DEATH.



LAT...LON 3370 11696 3372 11665 3343 11647 3344 11692



$$



PURPURA

