Satellite Interpretation Message
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000
ATHW40 PHFO 080049 CCA
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0030 UTC THU DEC 08 2016

BASED ON DATA THROUGH 0000 UTC DECEMBER 08 2016

THE TRADE WIND FLOW IS LARGELY DISRUPTED ACROSS MUCH OF THE REGION
DUE TO A PAIR OF SURFACE TROUGHS THAT ARE BEING INFLUENCED BY AN
UPPER LEVEL TROUGH MOVING ACROSS THE WESTERN PORTION OF THE AREA.

THE UPPER LEVEL TROUGH AXIS IS CENTERED ALONG 30N166W...21N170W...
AND 12N180 AND IS TRAVELING TO THE EAST AROUND 20 MPH. THIS
FEATURE IS TRIGGERING SCATTERED THUNDERSTORMS WITH TOPS TO 41000
FT WITHIN 90 MILES A SURFACE TROUGH FROM 30N162W TO 25N166W. THE
SURFACE TROUGH EXTENDS SOUTHWESTWARD TO 20N177W WHERE IT IS
MARKED BY BROKEN LOW CLOUDS. THE UPPER LEVEL TROUGH IS TRIGGERING
ANOTHER BATCH OF SCATTERED THUNDERSTORMS SOUTHEAST OF JOHNSTON
ATOLL IN THE AREA FROM 17N TO 11N BETWEEN 166W AND 170W. HIGH
CLOUDS ARE STREAMING NORTHEASTWARD OUT OF THIS AREA AND ARE
PASSING OVER THE MAIN HAWAIIAN ISLANDS.

A WEAK EASTERLY LOW LEVEL FLOW IS IN PLACE OVER THE ISLANDS...
THOUGH IT IS DIFFICULT TO TRACK INDIVIDUAL LOW CLOUD MOTIONS DUE
TO THE HIGH CLOUDS PASSING OVERHEAD. BROKEN LOW CLOUDS ARE
OBSERVED OVER INTERIOR TERRAIN OF THE SMALLER ISLANDS...SINCE THE
WEAK TRADE WIND FLOW HAS BEEN OVERPOWERED BY AFTERNOON SEA
BREEZES. MOISTURE FROM A WEAK SURFACE TROUGH STRETCHING OVER THE
BIG ISLAND IS PRODUCING MORE EXTENSIVE CLOUD COVER OVER THAT
ISLAND...WHERE A FEW TOWERING CUMULUS CELLS RISE TO AROUND 17000
FT.

THE ABOVE MENTIONED SURFACE TROUGH RUNS FROM 30N148W...26N150W...
TO THE BIG ISLAND AT 20N155W...AND 10N161W. BROKEN LOW CLOUDS ARE
LARGELY CONFINED TO WITHIN 75 MILES OF THE TROUGH...WHILE ISOLATED
THUNDERSTORMS ARE FOUND NEAR 30N148W.

$$

EFFECTIVE WEDNESDAY...DECEMBER 14 2016...THE NWS WILL DISCONTINUE
THIS PRODUCT. FOR QUESTIONS...PLEASE CONTACT TOM EVANS AT
808-973-5273. THE OFFICIAL CHANGE NOTICE CAN BE FOUND AT...ALL
LOWER CASE...HTTP://WWW.NWS.NOAA.GOV/OM/NOTIF.HTM



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