Satellite Interpretation Message
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000
ATHW40 PHFO 181231
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC SAT APR 18 2015

BASED ON DATA THROUGH 1200 UTC APRIL 18 2015

THE INFRARED SATELLITE LOOP SHOW WAVE AFTER WAVE OF SHOWERS AND
CLOUDS MOVING ASHORE OF WINDWARD BIG ISLAND BETWEEN UPOLU POINT AND
THE PUNA DISTRICT SINCE SUNSET. THIS HAS RESULTED IN PERIODS OF
CLOUDS AND SHOWERS...ALTERNATING WITH PERIODS OF FAIR SKIES THERE.
THE LAST OF THESE WAVES IS ABOUT TO MOVE ASHORE WITH A SCATTERED
DISTRIBUTION OF SHOWER BEARING CLOUDS LOCATED UPWIND OF THE ISLAND.

SKIES ARE FAIR ACROSS THE KAU DISTRICT OF THE BIG ISLAND BUT
EARLIER...A ROGUE WAVE OF SHOWERS REACHED AND DISSIPATED OVER THAT
PART OF THE ISLAND. ON KONA SIDE...CLOUDINESS CONTINUE TO DISSIPATE
WITH LOCALLY BROKEN COVERAGE BETWEEN THE AIRPORT AND MILOLII. A
SHOWER OR TWO HAVE BROKEN OUT JUST OFF THE KONA SHORELINE NEAR
CAPTAIN COOK. FAIR SKIES DOMINATED THE REST OF THE BIG ISLAND.

ONE OR TWO OF THE MANY WAVES BYPASSED THE BIG ISLAND AND ROLLED ON
TO WINDWARD MAUI. OTHERWISE...FAIR SKIES RULED THE ISLAND/S LEEWARD
SECTION. MOLOKAI AND LANAI HAVE BEEN DRY UP TO NOW WITH RELATIVELY
FAIR SKIES ALL AROUND. WINDWARD AND INTERIOR KAUAI HAS HAD A FEW
LIGHT SHOWERS MOVE THROUGH ALTHOUGH FAIR SKIES DOMINATED. ON
OAHU...PARTS OF THE ISLAND CONTINUED DAMP FROM KOOLAU/S IN UPPER
WAHIAWA TO THE NORTH SHORE. THE REST OF THE WINDWARD SECTION IS
GENERALLY DRY WITH SCATTERED TO BROKEN COVERAGE. THE LEE SIDE HAS
MOSTLY CLEAR SKIES.

SATELLITE IMAGERY SHOW CLOUDS THAT WERE OVER THE WINDWARD WATERS
OFF THE BIG ISLAND AND MAUI AT SUNSET ARE NOW PASSING NORTH OF OAHU.
THE LEEWARD WATERS IS GENERALLY CLEAR WITH A STRAY SHOWER HERE AND
THERE.

THE PREVAILING WIND FLOW ACROSS THE MAIN HAWAIIAN ISLANDS IS FROM
EAST TO WEST AT AROUND 20 MPH.

ELSEWHERE ON SATELLITE IMAGERY...A FRONTAL CLOUD BAND IS LOCATED
JUST NORTH OF MIDWAY ATOLL. THE COORDINATES OF THE FRONT ARE FROM
32N170W TO 30N175W TO 28N177E...AND CONTINUES TO EASE SOUTHEASTWARD
NEAR 10 KT.

MAINLY HIGH CIRRUS CLOUDS CONTINUED TO SHROUD THE AREA FAR
SOUTHEAST OF THE BIG ISLAND EAST OF A LINE FROM 22N140W TO 11N160W.
THESE COORDINATES ALSO MARK THE LOCATION OF AN UPPER LEVEL TROUGH.

WATER VAPOR IMAGERY SHOWS A DRY NORTH TO NORTHWESTERLY WIND FLOW
OVER THE MAIN HAWAIIAN ISLANDS.

IN THE TROPICS FAR SOUTH OF THE HAWAIIAN ISLANDS...THE SMALL CLUSTER
OF STORMS DIRECTLY SOUTH OF OAHU HAS DISSIPATED. TO THE EAST...A
LOOSE AREA OF THUNDERSTORMS HAS BECOME AN CONCENTRATED AREA OF
MODERATE TO STRONG STORMS AND TOPS TO 54K FEET. SCATTERED
CUMULONIMBUS CLOUDS HAVE SPILLED EAST OF THE DATELINE TO
170W...SOUTH OF 10N.


$$

LAU









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