ATPQ40 PGUM 251525
SIMGUM
SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
100 AM CHST THU NOV 26 2009
WESTERN NORTH PACIFIC BETWEEN EQUATOR AND 25N FROM 130E TO 180.
SUPER TYPHOON NIDA (26W) IS CENTERED 200 MILES WEST-SOUTHWEST OF 
GUAM AT 13N142E...MOVING NORTHWEST AT 14 MPH WITH MAXIMUM SUSTAINED 
WINDS OF 175 MPH. HEAVY RAIN AND SCATTERED THUNDERSTORMS ARE FOUND 
WITHIN 100 MILES OF THE CENTER. NUMEROUS SHOWERS AND ISOLATED 
THUNDERSTORMS ARE OCCURRING FARTHER NORTH AND WEST OF THE CENTER 
WITHIN 60 MILES OF A LINE FROM 16N144E TO 15N141E TO 14N139E TO 
11N139E. SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE SEEN EAST OF 
NIDA JUST WEST OF GUAM AND ROTA WITHIN 20 MILES OF A LINE FROM 
12N145E TO 15N144E. FOR MORE INFORMATION ON SUPER TYPHOON NIDA...SEE 
BULLETINS ISSUED BY THE JTWC UNDER WMO HEADER WTPN31 PGTW...AND 
ADVISORIES ISSUED BY THE NATIONAL WEATHER SERVICE UNDER WMO HEADER 
WTPQ31 PGUM.
A MONSOON TROUGH EXTENDS EAST-NORTHEASTWARD FROM MINDANAO TO SUPER 
TYPHOON NIDA AT 13N142E...THEN CONTINUES EAST-SOUTHEASTWARD 
THROUGH A CIRCULATION CENTERED EAST OF KOSRAE NEAR 5N166E TO END AT 
EQ171E. CONVERGING WINDS SOUTH OF THE MONSOON TROUGH AXIS ARE 
CAUSING SCATTERED SHOWERS AND A FEW THUNDERSTORMS OVER KOROR BUT 
SOUTH OF YAP WITHIN 140 MILES OF A LINE FROM 3N130E TO 7N140E TO 
7N149E. SIMILAR CONDITIONS ARE ALSO OCCURRING NEAR THE CIRCULATION 
EAST OF KOSRAE...OR BETWEEN THE EQUATOR AND 8N FROM 160E TO 170E.
A SHEAR LINE CUTS ACROSS THE NORTHWEST CORNER OF THE DISCUSSION AREA 
FROM 21N130E TO 25N137E. CLOUDINESS AND SCATTERED SHOWERS ARE 
PRESENT ALONG AND UP TO 125 MILES NORTHWEST OF THIS BOUNDARY.
TRADE-WIND CONVERGENCE IS COMBINING WITH UPPER-LEVEL DIVERGENCE TO 
PRODUCE SCATTERED SHOWERS AND A FEW THUNDERSTORMS EAST OF THE 
MARIANAS BETWEEN 11N AND 17N FROM 150E TO 158E. SIMILAR WEATHER IS 
ALSO SEEN JUST EAST OF THE MARSHALL ISLANDS BETWEEN THE EQUATOR AND 
11N FROM 173E TO 180.
$$
CHAN