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000
ATHW40 PHFO 200530
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC THU JUN 20 2013

BASED ON DATA THROUGH 0500 UTC JUNE 20 2013

WATER VAPOR IMAGERY...SHOWING FEATURES ABOVE ABOUT 24000
FEET...SHOWS AN UPPER TROUGH ORIENTED NORTHEAST TO SOUTHWEST JUST
WEST OF THE MAIN HAWAIIAN ISLANDS. WITH AN AXIS EXTENDING ROUGHLY
THROUGH 30N150W AND 20N165W...THIS FEATURE HAS MOVED VERY LITTLE
OVER THE PAST 24 HOURS. A RAGGED 300 TO 400 MILE WIDE BAND OF BROKEN
HIGH CLOUDS EAST OF A LINE FROM 30N146W TO 20N151W TO 13N164W MARKS
THE EASTERN FLANK OF THIS UPPER TROUGH.

AT LOW LEVELS...A BROAD ANTICYCLONIC CIRCULATION DOMINATES FLOW
SOUTH OF 35N ACROSS THE PACIFIC FROM THE MAINLAND TO THE DATELINE.
CENTERED NEAR 32N140W...THIS CIRCULATION...ACTUALLY A SUBTROPICAL
HIGH...HAS AN ASSOCIATED RIDGE EXTENDING WEST FROM THE CENTER
THROUGH 30N170W AND 30N180W. LOW LEVEL FLOW IS GENERALLY FROM EAST
TO WEST TO THE SOUTH OF THE RIDGE AXIS...INCLUDING ACROSS THE MAIN
HAWAIIAN ISLANDS AND LOCAL WATERS. TRADE WIND CONVERGENCE ALONG THE
SOUTHERN FRINGE OF THE ANTICYCLONIC CIRCULATION CONTINUES TO PRODUCE
BROKEN TO OVERCAST LAYERED CLOUDS WITH ISOLATED TO SCATTERED
CUMULONIMBUS...CB...FROM 05N TO 11N BETWEEN 145W AND 160W. SCATTERED
TO NUMEROUS CB ARE NOTED WEST OF 168W BETWEEN 04N AND 09N.

LOW CLOUD COVER ACROSS THE MAIN HAWAIIAN ISLANDS FOLLOWS A TRADE
WIND PATTERN...WITH COVERAGE FAVORING WINDWARD AND MAUKA AREAS.
BROKEN LOW CLOUDS COVER MAUKA SECTIONS OF KAUAI...ALTHOUGH THIS
COVERAGE IS DECREASING RAPIDLY. PATCHY BROKEN LOW CLOUDS COVER THE
KOOLAU SUMMITS ON OAHU AND THE EASTERN THIRD OF MOLOKAI. BROKEN TO
OVERCAST LOW CLOUDS COVER WINDWARD HALEAKALA SLOPES ON MAUI AS WELL
AS WINDWARD SLOPES OF THE WEST MAUI MOUNTAINS. PATCHY BROKEN LOW
CLOUDS COVER WINDWARD BIG ISLAND SLOPES...WHILE DAYTIME HEATING AND
RETURN FLOW HAVE SPAWNED THE USUAL OVERCAST LOW CLOUD COVERAGE
ACROSS KAU SLOPES AND KONA SLOPES SOUTH OF KAILUA-KONA. A FIELD OF
BROKEN LOW CLOUDS IS APPROACHING THE BIG ISLAND FROM THE EAST...BUT
OTHERWISE LOCAL WATERS HAVE GENERALLY SCATTERED LOW CLOUDS.
SATELLITE LOOP SHOWS LOW CLOUDS ARE MOVING ACROSS LOCAL WATERS
TOWARD THE WEST AT 15 TO 20 MPH.

$$
POWELL