217  
WWMY80 PGUM 200903  
SPSMY  
 
SPECIAL WEATHER STATEMENT  
NATIONAL WEATHER SERVICE TIYAN GU  
703 PM CHST THU SEP 20 2018  
 
GUZ001>004-210200-  
GUAM-ROTA-TINIAN-SAIPAN-  
703 PM CHST THU SEP 20 2018  
 
...TROPICAL DISTURBANCE NEAR GUAM IS NOW THE SUBJECT OF A  
TROPICAL CYCLONE FORMATION ALERT...  
 
ANDERSEN AIR FORCE BASE RADAR INDICATES A TROPICAL DISTURBANCE IS  
CENTERED NEAR 13N146E...WHICH IS ABOUT 80 MILES SOUTHEAST OF  
GUAM. THE DISTURBANCE IS MOVING TOWARD WEST-NORTHWEST. IT IS NOW  
THE SUBJECT OF A TROPICAL CYCLONE FORMATION ALERT ISSUED BY THE  
JOINT TYPHOON WARNING CENTER.  
 
A FLASH FLOOD WATCH IS IN EFFECT FOR THE MARIANA ISLANDS AND A  
SMALL CRAFT ADVISORY IS IN EFFECT FOR SAIPAN AND TINIAN WATERS.  
 
THE DISTURBANCE AND AN ASSOCIATED MONSOON TROUGH WILL MOVE SLOWLY  
ACROSS THE MARIANAS AND CAUSE PERIODS OF HEAVY RAIN AND LOCALLY  
GUSTY WINDS THIS WEEKEND.  
 
WEATHER CONDITIONS OVER THE MARIANAS WILL NEED TO BE MONITORED  
CAREFULLY THE NEXT FEW DAYS.  
 
RESIDENTS OF GUAM AND THE COMMONWEALTH OF THE NORTHERN MARIANAS  
SHOULD KEEP INFORMED WITH THE LATEST FORECASTS AND STATEMENTS FROM  
THE NATIONAL WEATHER SERVICE AND YOUR LOCAL EMERGENCY MANAGEMENT  
OFFICE. THE LATEST WEATHER FORECASTS AND ADVISORIES ARE AVAILABLE  
ON THE WFO GUAM WEBSITE AT WWW.PRH.NOAA.GOV/GUAM/  
 

 
 
SIMPSON  
 
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