239  
WGMY50 PGUM 070138  
FFWGUM  
GUC010-070300-  
/O.NEW.PGUM.FF.W.0010.211007T0138Z-211007T0300Z/  
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/  
 
BULLETIN - EAS ACTIVATION REQUESTED  
FLASH FLOOD WARNING  
NATIONAL WEATHER SERVICE TIYAN GU  
1138 AM CHST THU OCT 7 2021  
 
THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A  
 
* FLASH FLOOD WARNING FOR...  
GUAM ISLAND IN THE MARIANAS...  
 
* UNTIL 100 PM CHST.  
 
* AT 1138 AM CHST, DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED  
HEAVY SHOWERS AND THUNDERSTORMS PRODUCING HEAVY DOWNPOURS ACROSS  
SOUTHERN TO CENTRAL GUAM. BETWEEN 0.5 AND 1.5 INCHES OF RAIN HAVE  
FALLEN WITH A RAIN RATE OF 1 TO 2 INCHES PER HOUR. ADDITIONAL  
RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE FOR THIS AREA.  
FLASH FLOODING IS IMMINENT, ESPECIALLY FOR AREAS NEAR STEEP  
TERRAIN.  
 
HAZARD...FLASH FLOODING CAUSED BY TRAINING HEAVY SHOWERS AND  
THUNDERSTORMS.  
 
SOURCE...RADAR AND AUTOMATED GAUGES.  
 
IMPACT...FLASH FLOODING OF STREAMS, URBAN AREAS, STREETS, AND  
OTHER POOR DRAINAGE AND LOW-LYING AREAS.  
 
* SOUTHERN TO CENTRAL GUAM  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
TURN AROUND, DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD  
DEATHS OCCUR IN VEHICLES.  
 
BE AWARE OF YOUR SURROUNDINGS AND DO NOT DRIVE ON FLOODED ROADS.  
 
STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME  
UNSTABLE AND UNSAFE.  
 
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE  
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED  
ROADS. FIND AN ALTERNATE ROUTE.  
 
FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE  
YOU ARE RELATIVE TO STREAMS, RIVERS, OR CREEKS WHICH CAN BECOME  
KILLERS IN HEAVY RAINS. HIKERS SHOULD AVOID STREAMS OR CREEKS.  
 

 
 
LAT...LON 1334 14463 1340 14466 1342 14464 1344 14480  
1339 14477 1334 14477 1333 14476 1332 14477  
1327 14475 1325 14472 1323 14465 1324 14464  
1324 14468 1325 14467 1333 14465  
 
FLASH FLOOD...RADAR AND GAUGE INDICATED  
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR  
 

 
 
BPB/NRS/JLS  
 
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