137 
ATPQ40 PGUM 051459
SIMGUM

SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
1259 AM CHST THU MAY 6 2021

WESTERN NORTH PACIFIC BETWEEN THE EQUATOR AND 25N FROM 130E TO 180.

A PAIR OF SURFACE TROUGHS LIES BETWEEN THE EQUATOR AND 9N FROM 141E
TO 148E. THESE TROUGHS ARE TRIGGERING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS BETWEEN 3N AND 12N FROM 139E TO 152E. THIS CONVECTION
IS JUST EAST OF YAP AND JUST WEST OF CHUUK.

TRADE-WIND CONVERGENCE IS CAUSING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS OVER CHUUK...POHNPEI AND KOSRAE STATES BETWEEN 3N AND
7N FROM 152E TO 156E...BETWEEN 4N AND 7N FROM 156E TO 164E...AND
SOUTH OF THE MARSHALL ISLANDS OVER KIRIBATI WITHIN 120 MILES OF A
LINE FROM EQ159E TO 3N169E TO 3N176E.

A WEAKENING UPPER-LEVEL LOW CENTERED NEAR 16N167E IS GENERATING
PATCHY SHOWERS AND ISOLATED THUNDERSTORMS NORTH OF THE NORTHERN
MARSHALL ISLANDS BETWEEN 12N AND 15N FROM 162E TO 165E AND NEAR WAKE
ISLAND BETWEEN 18N AND 21N FROM 164E TO 171E.

A COLD FRONT EXTENDS WEST-SOUTHWESTWARD THROUGH 25N161E TO 20N132E.
EXTENSIVE CLOUDINESS AND PATCHY RAIN ARE SEEN ALONG AND UP TO 200
MILES NORTH OF THIS BOUNDARY.

UPPER-LEVEL DIVERGENCE SOUTH AND EAST OF A MID-LATITUDE UPPER-LEVEL
TROUGH IS CREATING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
WITHIN 60 MILES OF A LINE FROM 25N165E TO 19N155E TO 18N148E TO
18N144E...AND BETWEEN 13N AND 18N FROM 144E TO 130E AND FARTHER WEST.
THIS INCLUDES THE COMMONWEALTH OF THE NORTHERN MARIANAS NORTH OF
ANATAHAN AND IS JUST WEST OF THE REST OF THE MARIANAS.

$$