304  
ATPQ40 PGUM 190219  
SIMGUM  
 
SATELLITE INTERPRETATION MESSAGE  
NATIONAL WEATHER SERVICE TIYAN GU  
1219 PM CHST FRI JUL 19 2019  
 
WESTERN NORTH PACIFIC BETWEEN THE EQUATOR AND 25N FROM 130E TO 180.  
 
AN UPPER-LEVEL LOW CENTERED NORTHEAST OF THE MARIANA ISLANDS AT  
20N147E IS TRIGGERING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS  
WITHIN 150 MILES OF A LINE FROM 25N148E TO 12N154E.  
 
A SURFACE TROUGH NORTHWEST OF YAP EXTENDS FROM 10N136E TO 18N131E.  
SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE SEEN WITHIN 75 MILES  
OF THE TROUGH.  
 
ANOTHER SURFACE TROUGH EXTENDS NORTHEASTWARD FROM A WEAK CIRCULATION  
SOUTHEAST OF KOROR AT 5N136E TO NEAR GUAM AT 14N145E. SHOWERS AND  
ISOLATED THUNDERSTORMS SOUTH OF KOROR ARE OCCURRING WITHIN 100 MILES  
OF 4N135E. OTHERWISE...JUST ISOLATED SHOWERS AND THUNDERSTORMS ARE  
SEEN NEAR THE TROUGH.  
 
A WEAK SURFACE TROUGH RUNS NORTHEASTWARD FROM NEAR POHNPEI AT 7N155E  
THROUGH A WEAK CIRCULATION NORTHWEST OF MAJURO AT 9N169E TO END NEAR  
12N172E. SPOTTY SHOWERS AND THUNDERSTORMS ARE SEEN WITHIN 100 MILES  
OF THE TROUGH.  
 
A SECOND UPPER-LEVEL LOW EAST OF WAKE ISLAND AT 20N173E IS CAUSING  
ISOLATED SHOWERS AND THUNDERSTORMS WITHIN 100 MILES OF A LINE FROM  
23N173E TO 13N179E.  
 

 
 
SIMPSON  
 
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