Satellite Interpretation Message
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000
ATHW40 PHFO 240513
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC WED AUG 24 2016

BASED ON DATA THROUGH 0500 UTC AUGUST 24 2016

GEOSTATIONARY SATELLITE IMAGES CENTERED OVER THE MAIN HAWAIIAN
ISLANDS CONTINUE TO ARRIVE AT A GREATER THAN NORMAL FREQUENCY DUE
TO GOES-WEST HAWAII SECTOR RAPID SCAN OPERATIONS...WITH IMAGES
AVAILABLE EVERY 2 TO 7 MINUTES. RAPID SCAN OPERATIONS ARE SLATED
TO CONTINUE THROUGH EARLY THURSDAY MORNING.

DEEP TROPICAL MOISTURE REMAINS OVER THE MAIN HAWAIIAN ISLANDS
EARLY THIS EVENING. CLUSTERS OF COLD CLOUD TOPS WITH ESTIMATED
TOPS UP TO 45 THOUSAND FEET ARE CURRENTLY ACTIVE OVER THE COASTAL
AND OFFSHORE WATERS SOUTH OF OAHU...WITH THICK LAYERED CLOUDINESS
STREAMING NORTHWARD OVER OAHU. EARLIER DEEP CONVECTION HAS ENDED
FOR NOW OVER MAUI AND THE BIG ISLAND...BUT THOSE ISLANDS REMAIN
BLANKETED BY A REMNANT MID-LEVEL CLOUD DECK. BROKEN TO OVERCAST
CUMULUS IS STREAMING NORTHWARD OVER KAUAI...WHILE NIIHAU HAS
MOSTLY CLEAR SKIES.

ESTIMATED PRECIPITABLE WATER VALUES FROM POLAR ORBITER SATELLITES
CONFIRM THE DEEP TROPICAL MOISTURE OVER THE ISLANDS...AND THE
PRESENCE OF THIS UNUSUALLY RICH MOISTURE IS LIKELY A PRIMARY
CONTRIBUTOR TO THE HEAVY SHOWERS AND THUNDERSTORMS...DESPITE MID-
LEVEL RIDGING CENTERED JUST EAST OF THE STATE AS SHOWN IN WATER
VAPOR IMAGERY.

A DEEP LAYERED TROUGH AT THE SURFACE AND ALOFT IS CENTERED NEAR
30N 170W...AND EXTENDS SOUTHWARD TO 20N BETWEEN 165W AND 180.
AREAS OF LAYERED CLOUDINESS WITH ISOLATED THUNDERSTORMS ARE MOVING
NORTHWARD AROUND THE EASTERN SIDE OF THIS TROUGH OVER THE
NORTHWESTERN HAWAIIAN ISLANDS BETWEEN NIHOA AND GARDNER
PINNACLES...AND ALSO COVERING THE WATERS NORTH OF 22N BETWEEN
161W AND 168W. LAYERED CLOUDS AND ISOLATED THUNDERSTORMS ARE ALSO
ROTATING AROUND THE LOW CENTER ITSELF WITHIN 150 MILES OF 30N
170W. HIGHEST CLOUD TOPS IN THIS REGION ARE ESTIMATED NEAR 39
THOUSAND FEET. FINALLY...AN AREA OF DENSE CIRRUS AND CIRROSTRATUS
IS MOVING QUICKLY SOUTHWARD ON THE WESTERN SIDE OF THE TROUGH NEAR
MIDWAY ATOLL...NORTH OF 28N BETWEEN 175W AND 180.

ELSEWHERE ACROSS THE CENTRAL NORTH PACIFIC...ISOLATED
THUNDERSTORMS ARE LOCATED ALONG AND NORTH OF THE INTERTROPICAL
CONVERGENCE ZONE FROM 08N TO 14N BETWEEN 140W AND 155W. ISOLATED
TOWERING CUMULUS ARE ALSO PRESENT FROM 14N TO 17N BETWEEN 177W AND
180. HIGHEST ESTIMATED TOPS IN THESE REGIONS ARE BETWEEN 35 AND 42
THOUSAND FEET.

GENERALLY SCATTERED CUMULUS AND STRATOCUMULUS PREVAIL ACROSS THE
REMAINDER OF THE BASIN BETWEEN 140W AND 180...WITH SOME AREAS OF
BROKEN STRATOCUMULUS NORTH OF 20N AND EAST OF 155W.

$$

JACOBSON



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