753  
WWMY80 PGUM 202123  
SPSGUM  
 
SPECIAL WEATHER STATEMENT  
NATIONAL WEATHER SERVICE TIYAN GU  
723 AM CHST MON JUN 21 2021  
 
GUZ001-210700-  
GUAM-  
723 AM CHST MON JUN 21 2021  
 
...DEVELOPING TROPICAL DISTURBANCE TO PASS NEAR GUAM TUESDAY  
AND TUESDAY NIGHT..  
 
A DEVELOPING TROPICAL DISTURBANCE IS CENTERED NEAR 11N148E...  
ROUGHLY 350 MILES SOUTHEAST OF GUAM. IT'S GENERATING NUMEROUS  
SHOWERS AND ISOLATED THUNDERSTORMS AS IT CONTINUES TO SLOWLY  
BECOME MORE ORGANIZED, AND IS THE SUBJECT OF A TROPICAL CYCLONE  
FORMATION ALERT BY THE JOINT TYPHOON WARNING CENTER. THE LATEST  
FORECASTS CALL FOR A SLOW STRENGTHENING TREND, LIKELY BECOMING A  
TROPICAL DEPRESSION WITHIN THE NEXT 24 HOURS. FOR MORE  
INFORMATION, SEE BULLETINS ISSUED BY THE JOINT TYPHOON WARNING  
CENTER UNDER WMO HEADER WTPN22.  
 
THIS CIRCULATION IS STILL IN THE FORMATIVE STAGE, AND THE EXACT  
TRACK OF THIS SYSTEM REMAINS IN QUESTION. THE LATEST GUIDANCE  
INDICATES THE CENTER OF THIS SYSTEM WILL PASS JUST SOUTH OF GUAM  
TUESDAY, THEN MOVE WEST OF THE MARIANAS ON WEDNESDAY.  
 
SHOWERS, THUNDERSTORMS AND GUSTY WINDS ARE LIKELY TUESDAY THROUGH  
WEDNESDAY. ALTHOUGH IT'LL HIGHLY DEPEND ON HOW ORGANIZED THE  
SYSTEM IS AND WHERE IT TRACKS, CURRENT ESTIMATES CALL FOR 2 TO 4  
INCHES OF RAINFALL THROUGH WEDNESDAY NIGHT. SUSTAINED WINDS OF 15  
TO 25 MPH, WITH GUSTS TO 40 MPH ARE POSSIBLE IN THE STRONGER  
SHOWERS AND THUNDERSTORMS. CONTINUE TO MONITOR THE FORECAST, AS  
CHANGES ARE LIKELY.  
 

 
 
GUZ002>004-210700-  
ROTA-TINIAN-SAIPAN-  
723 AM CHST MON JUN 21 2021  
 
FOR THE REMAINDER OF THE MARIANAS, AS THE TROPICAL SYSTEM PASSES  
BY GUAM, MOISTURE WILL BE PULLED NORTHWARD. CURRENT EXPECTATIONS  
ARE FOR PERIODS OF SHOWERS AND THUNDERSTORMS TO AFFECT ROTA,  
WHERE 1 TO 3 INCHES OF RAINFALL ARE POSSIBLE, WITH SUSTAINED WINDS  
OF 15 TO 25 MPH.  
 

 
 
DOLL/ZIOBRO  
 
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