899  
FNMY50 PGUM 120033  
FWFGUM  
 
FIRE WEATHER PLANNING FORECAST FOR GUAM  
NATIONAL WEATHER SERVICE TIYAN GU  
1033 AM CHST MON APR 12 2021  
   
..FIRE WEATHER WATCH IN EFFECT UNTIL 6 PM CHST THIS EVENING
 
 
   
DISCUSSION
 
A DRYING TREND CONTINUES ACROSS THE ISLAND OF GUAM. THE  
BENEFIT TO WESTERN AREAS FROM THE ISLAND EFFECT RAINFALL IS FADING.  
FOR THE REST OF GUAM, VEGETATION IS RATHER DRY AND GETTING DRIER.  
HUMIDITY IS DOWN TO 65% ALREADY TODAY, NEARING RED FLAG CRITERIA. THE  
MAXIMUM 2 MINUTE WIND IS 18 MPH, JUST BELOW RED FLAG CRITERIA OF 20  
MPH. SO A RED FLAG WARNING IS STILL POSSIBLE TODAY. WINDS WILL THEN  
BACK OFF A BIT, THEN WE WILL HAVE TO SEE WHAT EFFECT THE WINDS FROM  
THE TROPICAL DISTURBANCE HAVE, AND IF THEY ARE ACCOMPANIED BY  
RAINFALL. THE KBDI CONTINUES TO RISE SLOWLY WITHIN THE HIGH CATEGORY  
AND IS AT 689 TODAY. THE WIND, HOWEVER, MAKES TODAY'S FIRE DANGER  
VERY HIGH.  
 

 
 
GUZ001-130045-  
GUAM-  
1033 AM CHST MON APR 12 2021  
   
..FIRE WEATHER WATCH IN EFFECT UNTIL 6 PM CHST THIS EVENING
 
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY MCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE RAIN (%) 20 20 20  
TEMP 88 76 88  
RH % 64 91 65  
20FTWND-VAL/AM(MPH) E 8 E 9  
20FTWND-RDG/PM(MPH) E 14G20 E 8 E 14G20  
MIXING HGT(FT-MSL) 4003 0 4039  
TRANSPORT WND (MPH) E 16 SE 0 E 21  
 

 
 
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
TUESDAY NIGHT
 
MOSTLY CLOUDY WITH ISOLATED SHOWERS. LOWS IN THE  
UPPER 70S. EAST WINDS 5 TO 10 MPH.    
WEDNESDAY
 
MOSTLY CLOUDY WITH ISOLATED SHOWERS. HIGHS IN THE  
UPPER 80S. SOUTHEAST WINDS 5 TO 10 MPH.    
WEDNESDAY NIGHT
 
MOSTLY CLOUDY WITH ISOLATED SHOWERS. LOWS IN  
THE UPPER 70S. EAST WINDS 5 TO 10 MPH.    
THURSDAY
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. HIGHS IN THE MID 80S. EAST WINDS 10 TO 15 MPH.    
THURSDAY NIGHT
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND  
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 70S. EAST WINDS 10 TO  
15 MPH.    
FRIDAY
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. HIGHS IN THE MID 80S. SOUTHEAST WINDS 10 TO  
15 MPH.    
FRIDAY NIGHT
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. LOWS IN THE UPPER 70S. SOUTHEAST WINDS 10 TO  
15 MPH.    
SATURDAY
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED  
THUNDERSTORMS. HIGHS IN THE MID 80S. SOUTHEAST WINDS 10 TO  
15 MPH.    
SATURDAY NIGHT
 
MOSTLY CLOUDY WITH ISOLATED SHOWERS. LOWS IN  
THE UPPER 70S. EAST WINDS 5 TO 10 MPH.    
SUNDAY
 
PARTLY SUNNY WITH ISOLATED SHOWERS. HIGHS IN THE UPPER  
80S. SOUTHEAST WINDS 5 TO 15 MPH.  
 

 
 
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