Satellite Interpretation Message
Issued by NWS Tiyan, Guam

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000
ATPQ40 PGUM 131501
SIMGUM

SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
101 AM CHST THU DEC 14 2017

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

A MONSOON TROUGH EXTENDS SOUTHEASTWARD FROM A DEVELOPING CIRCULATION
JUST EAST OF THE PHILIPPINES NEAR 11N128E...PASSING BETWEEN YAP AND
KOROR AT 8N137E AND THEN THROUGH A WEAK CIRCULATION CENTERED SOUTH OF
CHUUK AT 3N151E TO END AT EQ153E. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS ARE OCCURRING SOUTH OF THE TROUGH AND NEAR THE SECOND
CIRCULATION...SOUTH OF A LINE FROM 5N138E TO 2N153E. SIMILAR
CONDITIONS ARE ALSO SEEN NORTH OF THIS CIRCULATION OVER CHUUK BETWEEN
4N AND 9N FROM 146E TO 155E. ISOLATED THUNDERSTORMS ARE PRESENT NEAR
KOROR BETWEEN 5N AND 11N FROM 130E TO 137E.

A SURFACE TROUGH RUNS NORTHEASTWARD FROM THE CIRCULATION EAST OF THE
PHILIPPINES TO END AT A LOW PRESSURE SYSTEM CENTERED SOUTHWEST OF IWO
TO ISLAND AT 21N139E. SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE
FOUND NEAR THE TROUGH WITHIN 125 MILES OF A LINE FROM 12N130E TO
15N135E. PATCHY RAIN IS EVIDENT NEAR THE LOW WITHIN 100 MILES OF A
LINE FROM 17N134E TO 21N140E.

A FRONTAL BOUNDARY EXTENDS SOUTHWESTWARD FROM NORTH OF MINAMI TORI
SHIMA THROUGH 25N150E TO END AT THE LOW PRESSURE SYSTEM SOUTHWEST OF
IWO TO ISLAND. WIDESPREAD RAIN IS HAPPENING NORTH OF A LINE FROM
19N142E TO 24N150E.

THE ITCZ IS GENERATING HEAVY SHOWERS AND ISOLATED THUNDERSTORMS NEAR
POHNPEI AND KOSRAE BETWEEN 1N AND 7N FROM 155E TO 164E...AND ALSO
OVER THE MARSHALL ISLANDS BETWEEN 5N AND 10N FROM 166E TO 180.

$$

CHAN


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