308  
WGUS56 KMTR 270656  
FFWMTR  
CAC081-087-271245-  
/O.NEW.KMTR.FF.W.0002.210127T0656Z-210127T1245Z/  
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/  
 
BULLETIN - EAS ACTIVATION REQUESTED  
FLASH FLOOD WARNING  
NATIONAL WEATHER SERVICE SAN FRANCISCO CA  
1056 PM PST TUE JAN 26 2021  
 
THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A  
 
* FLASH FLOOD WARNING FOR...  
THE CZU LIGHTNING COMPLEX BURN AREA IN...  
SOUTHEASTERN SAN MATEO COUNTY IN NORTHERN CALIFORNIA...  
NORTHWESTERN SANTA CRUZ COUNTY IN NORTHERN CALIFORNIA...  
 
* UNTIL 445 AM PST.  
 
* AT 1056 PM PST, DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED  
HEAVY RAIN FALLING OVER THE CZU LIGHTNING COMPLEX BURN AREA.  
BETWEEN 0.5 AND 1 INCH OF RAIN HAS FALLEN. FLASH FLOODING IS  
ONGOING OR EXPECTED TO BEGIN SHORTLY.  
 
EXCESSIVE RAINFALL OVER THE BURN AREA WILL RESULT IN DEBRIS FLOW  
MOVING THROUGH THE CZU LIGHTNING COMPLEX BURN AREA. THE DEBRIS FLOW  
CAN CONSIST OF ROCK, MUD, VEGETATION AND OTHER LOOSE MATERIALS.  
 
HAZARD...LIFE THREATENING FLASH FLOODING. HEAVY RAIN PRODUCING  
FLASH FLOODING IN AND AROUND THE CZU LIGHTNING COMPLEX  
BURN AREA.  
 
SOURCE...DOPPLER RADAR AND AUTOMATED GAUGES.  
 
IMPACT...LIFE THREATENING FLASH FLOODING OF AREAS IN AND AROUND  
THE CZU LIGHTNING COMPLEX BURN AREA.  
 
* SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...  
BOULDER CREEK.  
 
THIS IS A LIFE THREATENING SITUATION FOR PEOPLE IN OR NEAR THE CZU  
LIGHTNING COMPLEX BURN AREA. SOME DRAINAGE BASINS IMPACTED INCLUDE...  
BUTANO CREEK...GAZOS CREEK...WADDELL CREEK...SCOTT CREEK...BIG CREEK  
AND BOULDER CREEK.  
 
HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS FROM  
THE CZU LIGHTNING COMPLEX BURN AREA DOWNSTREAM. ANYONE LIVING OR  
TRAVELING ON ROADS IN THE CZU LIGHTNING COMPLEX BURN AREA OR ALONG  
SECONDARY ROADS LIKE SWANTON ROAD...JAMISON CREEK ROAD...AND HWY 9  
FROM BOULDER CREEK TO BROOKDALE...SHOULD BE ALERT FOR POSSIBLE ROAD  
PROBLEMS DUE TO EROSION...DEBRIS FLOWS...ROCKFALLS AND DEBRIS.  
ROADWAYS AND BRIDGES MAY BE WASHED AWAY IN PLACES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
THIS IS A LIFE-THREATENING SITUATION. IF YOU OBSERVE MOVEMENT OF  
SOILS MOVE TO HIGHER GROUND IMMEDIATELY.  
 

 
 
LAT...LON 3714 12234 3720 12235 3727 12231 3725 12222  
3718 12214 3713 12213 3714 12215 3711 12211  
3704 12209 3702 12211 3703 12213 3706 12214  
3707 12212 3708 12214 3707 12214 3703 12220  
3711 12227  
 
FLASH FLOOD...RADAR AND GAUGE INDICATED  
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE  
EXPECTED RAINFALL...2-4 INCHES IN 6 HOURS  
 

 
 
RWW  
 
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