Satellite Interpretation Message
Issued by NWS

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000
ATHW40 PHFO 050535
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC TUE MAY 05 2015

BASED ON DATA THROUGH 0500 UTC MAY 05 2015

THE LARGEST FEATURE IN THE CENTRAL NORTH PACIFIC APPEARS TO BE A
BROAD ANTICYCLONIC CIRCULATION CENTERED NEAR 35N145W. EAST TO WEST
LOW LEVEL FLOW IS NOTED SOUTH OF 30N EAST OF 165W...INCLUDING ACROSS
LOCAL HAWAIIAN WATERS. WEST TO EAST FLOW IS NOTED NORTH OF 35N EAST
OF 155W. THE CIRCULATION CENTER...ACTUALLY A SUBTROPICAL HIGH...HAS
NOT MOVED MUCH OVER THE PAST 12 HOURS.

A 300 TO 400 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS LIES WEST OF
A LINE FROM 42N160W TO 34N164W TO 29N168W. THIS FEATURE CHANGES TO A
RAGGED 200 MILE WIDE BAND OF BROKEN LAYERED CLOUDS WEST OF A LINE
FROM 29N168W TO 27N175W TO 26N180W. MARKING A FRONTAL
BOUNDARY...THESE CLOUD BANDS ALSO MARK THE WESTERN FLANK OF THE
SUBTROPICAL HIGH NOTED ABOVE.

IT IS AMAZING SOMETIMES HOW LITTLE OVERALL LOCAL CLOUD DISTRIBUTION
CHANGES...EVEN AFTER 24 HOURS...WHEN THE SYNOPTIC PATTERN IS STATIC.
LARGE PATCHES OF BROKEN TO OVERCAST LOW CLOUDS EMBEDDED WITHIN
EASTERLY TRADE FLOW ARE GLIDING ACROSS LOCAL HAWAIIAN WATERS THIS
EVENING. ONE OF THESE PATCHES LIES ACROSS THE EASTERN HALF OF THE
BIG ISLAND AND EXTENDS NORTHWARD ACROSS MAUI COUNTY WINDWARD WATERS.
OVERCAST LOW CLOUDS COVER ALL WINDWARD AND SOUTHEAST-FACING SHORES
AND SLOPES ON THE BIG ISLAND...AS WELL AS KONA SLOPES NORTHWARD TO
KAILUA-KONA. ALMOST ALL OF MAUI HAS BROKEN TO OVERCAST LOW CLOUDS.
IN CONTRAST...LANAI IS MOSTLY CLEAR. SCATTERED TO PATCHY BROKEN LOW
CLOUDS COVER MOLOKAI. OAHU IS CLEARER THAN THIS TIME LAST
NIGHT...WITH BROKEN LOW CLOUDS ACROSS WINDWARD SLOPES OF THE KOOLAU
MOUNTAINS. SCATTERED TO PATCHY BROKEN LOW CLOUDS COVER WINDWARD AND
MAUKA SECTIONS OF KAUAI. SATELLITE LOOP SHOWS LOW CLOUDS MOVING
WESTWARD ACROSS LOCAL WATERS IN THE 20 TO 25 MPH RANGE...HIGHEST IN
THE CHANNELS.

$$

POWELL








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