940  
ATPQ40 PGUM 230215  
SIMGUM  
 
SATELLITE INTERPRETATION MESSAGE  
NATIONAL WEATHER SERVICE TIYAN GU  
100 PM CHST SAT OCT 23 2021  
 
WESTERN NORTH PACIFIC BETWEEN THE EQUATOR AND 25N FROM 130E TO 180.  
 
A BROAD TROPICAL DISTURBANCE CENTERED ABOUT 250 MILES WEST OF GUAM  
NEAR 12N141E IS PRODUCING WIDESPREAD CLOUDINESS...SCATTERED SHOWERS  
AND ISOLATED THUNDERSTORMS IN A LARGE AREA BOUNDED BY 17N137E TO  
18N148E TO 13N156E TO 6N144E TO 7N140E TO 13N137E BACK TO 17N137E...  
INCLUDING THE MARIANA ISLANDS.  
 
LOW-LEVEL CONVERGENCE EAST TO SOUTHEAST OF THE TROPICAL DISTURBANCE  
IS GENERATING ISOLATED SHOWERS AND THUNDERSTORMS SOUTHEAST OF CHUUK  
BETWEEN 2N AND 6N FROM 152E TO 157E...AND WELL NORTH OF POHNPEI  
BETWEEN 10N AND 12N FROM 158E TO 161E.  
 
SCATTERED SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A TRADE-WIND  
DISTURBANCE ARE OCCURRING ACROSS MAJURO AS WELL AS NEAR KWAJALEIN  
AND KOSRAE...IN THE AREA BOUNDED BY 3N160E TO 10N171E TO 7N180 BACK  
TO 3N160E.  
 
AN UPPER-LEVEL LOW IS CENTERED JUST NORTHEAST OF WAKE ISLAND NEAR  
20N168E...AND A SURFACE TROUGH EXTENDS FROM 10N161E TO BEYOND 25N AT  
166E. THESE FEATURES ARE COMBINING TO PRODUCE SCATTERED SHOWERS AND  
THUNDERSTORMS EAST AND NORTHEAST OF WAKE...BETWEEN 19N AND 25N FROM  
169E TO 173E.  
 

 
 
MIDDLEBROOKE  
 
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