280  
FXPQ60 PGUM 192008  
AFDPQ  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE TIYAN GU  
608 AM CHST WED JUN 20 2018  
   
MARIANAS SYNOPSIS
 
 
MODERATE TRADES, ISOLATED SHOWERS AND COMBINED SEAS OF 3-4 FEET  
ARE PRESENT ACROSS THE MARIANAS THIS MORNING.  
 

 
   
DISCUSSION
 
 
MODELS SHOW LITTLE CHANGE IN OUR WEATHER FOR THE NEXT 5-7 DAYS, WITH  
SLOWLY DIMINISHING TRADE WINDS, PARTLY CLOUDY SKIES AND ISOLATED  
SHOWERS INTO EARLY NEXT WEEK. DRY AIR ALOFT SHOULD KEEP SHOWERS AT  
A MINIMUM THROUGH AT LEAST MONDAY. MEANWHILE, COMBINED SEAS SHOULD  
REMAIN AROUND 4 FEET, WITH JUST ENOUGH EAST SWELL TO KEEP THE RIP  
RISK MODERATE ALONG EAST FACING SHORES.  
 

 
   
EASTERN MICRONESIA AND CHUUK
 
 
A SURFACE TROUGH EXTENDS ACROSS THE AREA BETWEEN 4N AND 6N AND IS  
CAUSING SHOWERS AND THUNDERSTORMS JUST SOUTH OF POHNPEI, NEAR KOSRAE,  
AND AROUND MAJURO. THE TROUGH WILL CONTINUE TO SLOWLY MOVE WNW THE  
NEXT COUPLE OF DAYS, MAINTAINING WET WEATHER AT KOSRAE THROUGH  
THURSDAY. SHOWERS AND THUNDERSTORMS WILL INCREASE AT CHUUK, POHNPEI,  
AND MAJURO TONIGHT AND CONTINUE THROUGH THURSDAY OR THURSDAY NIGHT.  
DRIER EASTERLY TRADE WINDS WILL RESUME OVER THE WEEKEND.  
 
VOLCANIC HAZE WILL SLOWLY MOVE WESTWARD THROUGH THE REGION, BUT THE  
SURFACE TROUGH MOVING THROUGH WILL CHANGE THE WIND DIRECTION,  
SHUTTING OFF THE FLOW OF HAZE BY TONIGHT OR THURSDAY.  
 

 
   
WESTERN MICRONESIA FOR YAP AND KOROR
 
 
SHOWERS AND THUNDERSTORMS ARE FOUND NORTHEAST OF YAP ALONG A SURFACE  
TROUGH. UPPER-LEVEL DIVERGENCE ASSOCIATED WITH AN UPPER-LEVEL LOW  
NEAR THE MARIANAS IS HELPING TO SUPPORT THUNDERSTORM DEVELOPMENT. THE  
CONVECTION WILL SLOWLY SPREAD WESTWARD TODAY AND TONIGHT, BUT AT THE  
SAME TIME, WILL SEE LESSENING SUPPORT ALOFT. AS A RESULT, ONLY  
ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED THE NEXT FEW DAYS.  
 

 
   
GUM WATCHES/WARNINGS/ADVISORIES
 
 
GU...NONE.  
MARIANAS WATERS...NONE.  
 

 
 

 
 
MIDDLEBROOKE/W. AYDLETT  
 
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