Satellite Interpretation Message
Issued by NWS

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000
ATHW40 PHFO 251829
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC WED MAY 25 2016

BASED ON DATA THROUGH 1800 UTC MAY 25 2016

A SHARP MID TO UPPER LEVEL TROUGH IS DROPPING OVER THE MAIN
HAWAIIAN ISLANDS FROM THE NORTHWEST. THE AXIS OF THIS FEATURE
RUNS FROM 30N159W ACROSS KAUAI TO 17N161W AND IS TRAVELING TOWARD
TO EAST-SOUTHEAST AT 15 MPH. THE UPPER TROUGH IS TRIGGERING SMALL
CLUSTERS OF THUNDERSTORMS ALONG A WEAK SURFACE TROUGH 125 TO 300
MILES NORTH AND NORTHWEST OF KAUAI...WITH AN AREA OF RATHER STRONG
THUNDERSTORMS RISING AS HIGH AS 40000 FT ABOUT 250 MILES NORTH-
NORTHWEST OF KAUAI.

OVER THE ISLANDS...AN EASTERLY LOW LEVEL TRADE WIND FLOW VEERS OUT
OF THE EAST-SOUTHEAST ACROSS THE WESTERN HALF OF THE ISLAND
CHAIN. A FIELD OF BROKEN CUMULUS CLOUDS WITH TOPS AROUND 12000 FT
AND PRECIPITABLE WATER VALUES OF AROUND 1.4 INCHES IS PRODUCING
BROKEN TO OVERCAST LOW CLOUDS ALONG WINDWARD SLOPES OF THE BIG
ISLAND...MAUI...AND MOLOKAI...WITH THE EXCEPTION OF THE HAMAKUA
COAST. THIS BAND OF MOISTURE LIFTS NORTH OF MAUI AND MOLOKAI...
WHERE IT IS BEING ENHANCED BY THE ADVANCING UPPER LEVEL TROUGH. A
FEW THUNDERSTORM CELLS ARE FORMING WITHIN THE NORTHERN EXTEND OF
THIS FIELD ABOUT 110 MILES NORTH OF MOLOKAI. ANOTHER AREA OF
MOISTURE POOLED WEST OF MAUI AND THE BIG ISLAND IS PRODUCING
EXTENSIVE CLOUD COVER OVER LEEWARD BIG ISLAND THIS MORNING...WITH
CLOUD TOPS REMAINING BELOW 20000 FT.

THE VEERING TRADE WIND FLOW CONTINUES TO KEEP A LESSER AMOUNT OF
LOW LEVEL MOISTURE NEAR OAHU AND KAUAI THIS MORNING. SCATTERED TO
BROKEN LOW CLOUDS ARE BANKED ON WINDWARD TERRAIN...WHILE LEEWARD
SKIES ARE MOSTLY CLEAR AT THIS TIME.

ELSEWHERE...A PORTION OF THE ITCZ IS PRODUCING THUNDERSTORMS FROM
12N TO 08N WEST OF 171W. A NARROW BAND OF BROKEN HIGH CLOUDS IS
STREAMING FROM THIS AREA AND PASSING SOUTH OF THE BIG ISLAND. TO
THE NORTHWEST...A WEAK TROUGH JUST WEST OF THE DATE LINE IS
GENERATING BROKEN LOW CLOUDS OVER MIDWAY AND KURE ATOLLS. BROKEN
HIGH CLOUDS ARE ALSO PASSING OVER THIS AREA.

$$


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