Satellite Interpretation Message
Issued by NWS Tiyan, Guam

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ATPQ40 PGUM 211524
SIMGUM

SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
124 AM CHST TUE AUG 22 2017

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

THE SOUTHEASTERN END OF A MONSOON TROUGH STRETCHES SOUTHEASTWARD FROM
NEAR LUZON THROUGH 18N130E TO END AT A WEAK CIRCULATION CENTERED
SOUTHWEST OF GUAM AT 11N142E. AN UPPER-LEVEL TROUGH RUNS
NORTHWESTWARD FROM A LOW CENTERED NORTH OF YAP AT 14N139E TO END AT
20N130E. DIVERGENT WINDS ASSOCIATED WITH THE UPPER-LEVEL FEATURES ARE
ENHANCING SCATTERED SHOWERS AND THUNDERSTORMS FROM SOUTHWEST OF KOROR
TO WELL NORTHWEST OF KOROR BETWEEN 4N AND 18N FROM 130E TO 133E.
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE SEEN OVER YAP AND
WEST OF THE MARIANA ISLANDS WITHIN 125 MILES OF A LINE FROM 7N136E TO
10N138E TO 19N138E.

A NEAR-EQUATORIAL TROUGH MEANDERS EASTWARD FROM A WEAK CIRCULATION
CENTERED NEAR CHUUK AT 9N151E THROUGH TWO MORE CIRCULATIONS NORTH OF
KOSRAE AT 8N163E AND EAST OF MAJURO AT 7N176E TO BEYOND THE DATE LINE
AT 7N. SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE PRESENT NORTH OF
THE FIRST CIRCULATION...EAST OF THE MARIANA ISLANDS WITHIN 100 MILES
OF A LINE FROM 12N147E TO 16N150E. SIMILAR WEATHER IS ALSO FOUND NEAR
KOSRAE BUT JUST SOUTH OF MAJURO WITHIN 100 MILES OF A LINE FROM
7N162E TO 4N167E TO 8N178E.

ANOTHER UPPER-LEVEL TROUGH REACHES NORTHWARD FROM SOUTH OF POHNPEI AT
EQ155E TO A LOW CENTERED NORTHWEST OF ENEWETAK ATOLL AT 14N158E. A
FEW THUNDERSTORMS ARE EVIDENT NEAR POHNPEI BETWEEN 6N AND 8N FROM
155E TO 159E. SCATTERED SHOWERS AND A FEW THUNDERSTORMS ARE OCCURRING
FARTHER NORTH WITHIN 135 MILES OF 18N157E.

A TRADE-WIND DISTURBANCE IS CAUSING PATCHY SHOWERS AND THUNDERSTORMS
NEAR AND SOUTHEAST OF WAKE ISLAND WITHIN 50 MILES OF A LINE FROM
19N167E TO 19N171E TO 14N170E.

$$

CHAN



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