576  
WGMY60 PGUM 300505  
FFAGUM  
 
FLOOD WATCH  
NATIONAL WEATHER SERVICE TIYAN GU  
305 PM CHST MON JUN 30 2025  
 
GUZ001-010700-  
/O.CON.PGUM.FA.A.0001.000000T0000Z-250701T0700Z/  
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/  
GUAM-  
305 PM CHST MON JUN 30 2025  
   
..FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY AFTERNOON  
 
* WHAT...FLASH FLOODING CAUSED BY EXCESSIVE RAINFALL CONTINUES TO BE  
POSSIBLE.  
 
* WHERE...GUAM.  
 
* WHEN...THROUGH TUESDAY AFTERNOON.  
 
* IMPACTS...EXCESSIVE RUNOFF MAY RESULT IN FLOODING OF RIVERS,  
CREEKS, STREAMS, AND OTHER LOW-LYING AND FLOOD-PRONE LOCATIONS.  
FLOODING MAY OCCUR IN POOR DRAINAGE AND URBAN AREAS.  
 
* ADDITIONAL DETAILS...  
- BETWEEN 4 AND 8 INCHES OF RAIN HAS FALLEN OVER  
THE LAST FEW DAYS ACROSS GUAM. A MONSOON  
DISTURBANCE NORTHEAST OF THE REGION WILL  
ALLOW FOR A WET SOUTHWESTERLY PATTERN TO  
CONTINUE ACROSS THE REGION OVER THE NEXT COUPLE  
OF DAYS. THIS WILL ALLOW FOR BACK-FILLING SHOWERS  
OVER GUAM, LOCALLY HEAVY SHOWERS ARE POSSIBLE. AN  
ADDITIONAL 2 TO 4 INCHES OF RAIN WILL BE  
POSSIBLE THROUGH TUESDAY AFTERNOON, WHICH  
COULD LEAD TO FLASH FLOODING.  
- HTTP://WWW.WEATHER.GOV/SAFETY/FLOOD  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION  
SHOULD FLASH FLOOD WARNINGS BE ISSUED.  
 
 
 
 
 
PB  
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