Satellite Interpretation Message
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000
ATHW40 PHFO 241228
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC WED AUG 24 2016

BASED ON DATA THROUGH 1200 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 THIS MORNING...AND MAY BE EXTENDED
THROUGH THE DAY.

DEEP TROPICAL MOISTURE REMAINS OVER THE MAIN HAWAIIAN ISLANDS
EARLY THIS MORNING. CLUSTERS OF COLD CLOUD TOPS WITH ESTIMATED
TOPS UP TO 50 THOUSAND FEET ARE CURRENTLY ACTIVE OVER THE COASTAL
WATERS AROUND OAHU...WITH THICK LAYERED CLOUDINESS COVERING THAT
ISLAND. ANOTHER SMALLER AREA OF DEEP CONVECTION IS LOCATED SOUTH
OF MAUI COUNTY...WITH SOME CIRRUS EMANATING FROM THAT CONVECTION
SPREADING OVER MOLOKAI...LANAI AND MAUI. BROKEN CUMULUS COVERS
MOST OF KAUAI...AS WELL AS PARTS OF THE WINDWARD AND KAU COASTS
OF THE BIG ISLAND. A SMALL AREA OF SLOW MOVING TOWERING CUMULUS
IS LOCATED ALONG THE SOUTHEAST SLOPES OF MAUNA KEA...WITH
ESTIMATED TOPS AROUND 35 THOUSAND FEET. MOSTLY CLEAR SKIES PREVAIL
OVER THE REST OF THE BIG ISLAND...INCLUDING SOUTH CAPE...THE
KONA COAST AND THE KOHALA AREA.

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
31N 169W...AND EXTENDS SOUTHWARD TO 20N BETWEEN 160W AND 180.
AREAS OF LAYERED CLOUDINESS WITH ISOLATED THUNDERSTORMS ARE MOVING
NORTHWARD AROUND THE EASTERN SIDE OF THIS TROUGH NORTH OF 24N
BETWEEN 160W AND 168W. HIGHEST TOPS IN THIS AREA ARE NEAR 41
THOUSAND FEET. 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 172W AND 180.

ELSEWHERE ACROSS THE CENTRAL NORTH PACIFIC...ISOLATED
THUNDERSTORMS ARE LOCATED ALONG AND NORTH OF THE INTERTROPICAL
CONVERGENCE ZONE FROM 08N TO 15N BETWEEN 140W AND 155W. A FEW
ISOLATED TOWERING CUMULUS ARE ALSO PRESENT ALONG A LINE FROM 17N
154W TO 16N 158W. HIGHEST ESTIMATED TOPS IN THESE REGIONS ARE
BETWEEN 36 AND 45 THOUSAND FEET.

GENERALLY SCATTERED CUMULUS AND STRATOCUMULUS PREVAIL ACROSS THE
REMAINDER OF THE BASIN BETWEEN 140W AND 180...EXCEPT FOR AREAS
OF BROKEN STRATOCUMULUS NORTH OF 20N AND EAST OF 154W.

$$

JACOBSON



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