Satellite Interpretation Message
Issued by NWS Tiyan, Guam

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000
ATPQ40 PGUM 200430
SIMGUM

SATELLITE INTERPRETATION MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
230 PM CHST FRI OCT 20 2017

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

NEWLY UPGRADED TROPICAL STORM 27W IS CENTERED 485 MILES EAST-
SOUTHEAST OF GUAM NEAR 11N152E AND DRIFTING SOUTH AT 10 MPH WITH
MAXIMUM SUSTAINED WINDS OF 40 MPH. NUMEROUS HEAVY SHOWERS AND
ISOLATED THUNDERSTORMS ARE OCCURRING NORTH OF THE CENTER BETWEEN 11N
AND 15N FROM 149E TO 153E. FOR MORE INFORMATION ON TROPICAL STORM
27W...SEE BULLETINS ISSUED BY THE JOINT TYPHOON WARNING CENTER UNDER
WMO HEADER WTPN33 PGTW AND BY THE NATIONAL WEATHER SERVICE UNDER WMO
HEADER WTPQ33 PGUM.

TYPHOON LAN (25W) IS CENTERED 515 MILES SOUTH-SOUTHEAST OF OKINAWA AT
19N130E AND MOVING NORTH AT 9 MPH WITH MAXIMUM SUSTAINED WINDS OF 85
MPH. HEAVY RAIN AND ISOLATED THUNDERSTORMS ARE FOUND NEAR THE CENTER
WEST OF A LINE FROM 17N132E TO 21N132E. NUMEROUS HEAVY SHOWERS
AND SCATTERED THUNDERSTORMS ARE PRESENT FARTHER NORTHEAST AND
SOUTHEAST OF THE CENTER WITHIN 180 MILES OF A LINE FROM 11N133E TO
20N136E TO 25N134E. FOR MORE INFORMATION ON TYPHOON LAN...SEE
BULLETINS ISSUED BY THE JOINT TYPHOON WARNING CENTER UNDER WMO
HEADER WTPN32 PGTW AND BY THE NATIONAL WEATHER SERVICE UNDER WMO
HEADER WTPQ32 PGUM.

A NEAR-EQUATORIAL TROUGH CURVES EAST-SOUTHEASTWARD FROM TROPICAL
STORM 27W THROUGH TWO WEAK CIRCULATIONS CENTERED NEAR POHNPEI AT
7N158E AND JUST NORTH OF KWAJALEIN NEAR 11N169E...THEN TURNS
SOUTHWARD TO END AT 1N170E. PATCHY SHOWERS AND A FEW
THUNDERSTORMS ARE SEEN NEAR CHUUK...POHNPEI...KOSRAE AND THE
SOUTHERN MARSHALL ISLANDS BETWEEN 3N AND 8N. SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS ARE FOUND OVER THE NORTHERN MARSHALL
ISLANDS WITHIN 150 MILES OF 10N170E...AND EAST OF MAJURO BETWEEN
3N AND 12N FROM 174E TO 180.

CONVERGING SOUTHEAST WINDS NEAR A SURFACE RIDGE AXIS ARE TRIGGERING
ISOLATED THUNDERSTORMS WELL SOUTH OF KOROR AND YAP WITHIN 85 MILES
OF A LINE FROM EQ132E TO 4N142E.

DIVERGENT WINDS EAST OF AN UPPER-LEVEL LOW CENTERED NEAR MINAMI TORI
SHIMA ISLAND AT 22N154E ARE PRODUCING SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS NORTH OF WAKE ISLAND BETWEEN 20N AND 25N FROM 161E
TO 169E.

$$

CHAN


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