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000
ATHW40 PHFO 201225
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1230 UTC MON MAY 20 2013

BASED ON DATA THROUGH 1200 UTC MAY 20 2013

OVERCAST LAYERED CLOUDS COVER AN AREA BOUNDED BY 30N154W 28N150W
24N151W 20N155W 26N154W 30N154W...FORMING AN IRREGULAR ARC NORTH
NORTHEAST OF THE MAIN HAWAIIAN ISLANDS. THESE CLOUDS MARK THE
EASTERN FLANK OF AN UPPER TROUGH WITH AN AXIS WHICH EXTENDS THROUGH
32N161W AND 20N153W. A WEAK SURFACE LOW PERSISTS BENEATH THIS UPPER
TROUGH NEAR 27N157W...ABOUT 400 MILES NORTH NORTHEAST OF THE MAIN
HAWAIIAN ISLANDS. CLOUD TOPS ARE RATHER COOL WITHIN THIS CLOUD
ARC...WITH ISOLATED CUMULONIMBUS...CB...POPPING UP ABOUT 100 MILES
NORTHEAST OF THE BIG ISLAND. A RAGGED 60 TO 100 MILE WIDE BAND OF
SHOWERY BROKEN LOW CLOUDS EXTENDS NORTH OF A LINE FROM 21N156W TO
19N164W TO 22N174W. THIS BAND...MARKING A FRONTAL BOUNDARY...PASSES
ACROSS WESTERN AND CENTRAL PORTIONS OF THE MAIN HAWAIIAN ISLAND
CHAIN. LOW CLOUD COVER IS RATHER EXTENSIVE SOUTHEAST OF THE FRONTAL
CLOUD BAND...WITH ALL WINDWARD HAWAIIAN WATERS SOUTHEAST OF OAHU
COVERED BY BROKEN TO OVERCAST LOW CLOUDS. MORE BROKEN TO OVERCAST
LOW CLOUDS COVER WATERS SOUTHEAST THROUGH SOUTHWEST OF THE BIG
ISLAND.

KAUAI LIES NORTHWEST OF THE FRONTAL CLOUD BAND AND HAS CLEARER SKIES
THIS MORNING VERSUS LAST EVENING. SCATTERED LOW CLOUDS ACROSS MAUKA
AREAS ARE NOTED THERE. ALMOST ALL OF OAHU HAS BROKEN LOW
CLOUDS...WITH THICKER CLOUD COVER POISED TO MOVE ACROSS THAT ISLAND
FROM THE WEST AND NORTHWEST. ALL OF THE KAIWI CHANNEL AND ALL OF
MOLOKAI HAVE OVERCAST LOW CLOUDS. IN CONTRAST...LANAI APPEARS TO BE
MOSTLY CLEAR AT THIS HOUR. EXCEPT FOR BROKEN LOW CLOUDS ACROSS
EXTREME WESTERN MAUI...THAT ISLAND HAS SCATTERED LOW CLOUDS TO CLEAR
SKIES. THE BIG ISLAND IS DEFINITELY CLEARER THIS MORNING...WITH
BROKEN LOW CLOUDS NOTED ACROSS PUNA DISTRICT...ACROSS KOHALA AND
ACROSS KONA SLOPES BETWEEN CAPTAIN COOK AND KAILUA-KONA.

NORTHERLY WINDS NOTED NEAR KAUAI AND OAHU SHIFT GRADUALLY TO
NORTHWESTERLIES NEAR MAUI AND THE BIG ISLAND...WITH SOUTHEASTERLIES
NOTED ACROSS WATERS EAST THROUGH SOUTH OF THE BIG ISLAND. WIND
SPEEDS ARE LIGHT...10 MPH OR LESS.

$$
POWELL