Satellite Interpretation Message
Issued by NWS Tiyan, Guam

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000
ATPQ40 PGUM 210258
SIMGUM

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

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

A NEAR-EQUATORIAL TROUGH EXTENDS EAST-SOUTHEASTWARD FROM SOUTHEAST OF
KOROR AT 4N137E TO END NEAR EQ160E. SCATTERED TO NUMEROUS SHOWERS AND
ISOLATED THUNDERSTORMS ARE PRESENT WITHIN 180 MILES OF A LINE FROM
5N140E TO EQ160E. THIS IS SOUTH OF CHUUK AND POHNPEI.

ANOTHER SURFACE TROUGH EXTENDS NORTHEASTWARD FROM EQ160E THROUGH A
WEAK CIRCULATION CENTERED JUST EAST OF KOSRAE NEAR 6N165E TO END NEAR
12N169E. SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE FOUND WITHIN
225 MILES OF A LINE FROM 7N160E TO 4N173E. THIS AREA INCLUDES MAJURO
AND KOSRAE BUT IS JUST EAST OF POHNPEI.

CONVERGENCE NORTHEAST OF THE DISTURBANCE IS GENERATING SCATTERED
SHOWERS AND A FEW THUNDERSTORMS WITHIN 250 MILES OF A LINE FROM
14N164E TO 10N180. THIS IS NORTH OF MAJURO.

A SURFACE TROUGH EXTENDS NORTH-NORTHWEST FROM 10N132E TO BEYOND
15N130E. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE WELL
NORTHWEST OF KOROR BETWEEN 11N AND 17N FROM 131E TO 135E.

A SHEAR LINE CURVES WESTWARD THROUGH 25N153E TO 23N147E TO BEYOND
22N130E. SCATTERED SHOWERS ARE FOUND ALONG AND UP TO 150 MILES NORTH
OF THIS BOUNDARY. ISOLATED THUNDERSTORMS ARE PRESENT BETWEEN 130E AND
133E.

$$

AYDLETT


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