Satellite Interpretation Message
Issued by NWS Tiyan, Guam

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000
ATPQ40 PGUM 201458
SIMGUM

SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
1258 AM CHST SAT APR 21 2018

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

A NEAR-EQUATORIAL TROUGH EXTENDS EASTWARD FROM A WEAK CIRCULATION
CENTERED SOUTHWEST OF KOROR AT 3N130E...PASSING SOUTH OF CHUUK AT
5N150E TO END AT A BROAD CIRCULATION CENTERED SOUTHEAST OF KOSRAE
NEAR 4N164E. A SURFACE TROUGH RUNS NORTHEASTWARD FROM THE BROAD
CIRCULATION TO END NORTH OF MAJURO AT 12N172E. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS ARE OCCURRING SOUTH OF CHUUK WITHIN 115 MILES
OF A LINE FROM 5N147E TO EQ155E. SIMILAR CONDITIONS ARE FOUND OVER
KOSRAE AND THE MARSHALL ISLANDS BETWEEN 2N AND 11N FROM 161E TO 174E.

ANOTHER SURFACE TROUGH CURVES NORTHWESTWARD FROM NEAR YAP AT 8N137E
TO END SOUTHEAST OF OKINAWA AT 20N131E. SCATTERED SHOWERS AND
THUNDERSTORMS ARE SEEN BETWEEN 15N AND 19N FROM 131E TO 135E.

A WEAK COLD FRONT STRETCHES SOUTHWESTWARD FROM NORTHEAST OF IWO TO
ISLAND THROUGH 25N145E TO NEAR IWO TO AT 24N131E...THEN CONTINUES AS
A SHEAR LINE TO BEYOND 130E AT 20N. PATCHY CLOUDS AND SHOWERS AND A
FEW THUNDERSTORMS ARE PRESENT ALONG AND UP TO 200 MILES NORTHWEST OF
THIS BOUNDARY.

$$

CHAN



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