Satellite Interpretation Message
Issued by NWS

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000
ATHW40 PHFO 270538
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC MON APR 27 2015

BASED ON DATA THROUGH 0500 UTC APRIL 27 2015

A 180 TO 240 MILE WIDE BAND OF OVERCAST LAYERED CLOUDS LIES WEST OF
A LINE FROM 40N140W TO 33N144W TO 25N151W. THIS FEATURE CONTINUES
SOUTHWESTWARD AS A 180 MILE WIDE BAND OF BROKEN TO OVERCAST LOW
CLOUDS WEST OF A LINE FROM 25N151W TO 20N158W TO 15N166W. THE BAND
OF LOW CLOUDS...MARKING A WEAKENING FRONTAL BOUNDARY...LIES ACROSS
THE MAIN HAWAIIAN ISLANDS FROM THE KAUAI CHANNEL TO MAUI. THE CLOUD
BAND IS MOVING TOWARD THE EAST AT 10 TO 15 MPH NORTH OF 30N...BUT
GRADUALLY BECOMES STATIONARY JUST SOUTHWEST OF THE HAWAIIAN ISLANDS.

SATELLITE LOOP SHOWS THAT BROAD ANTICYCLONIC CIRCULATIONS GOVERN LOW
LEVEL FLOW ON BOTH SIDES OF THE FRONTAL BOUNDARY. THESE
CIRCULATIONS...ACTUALLY SUBTROPICAL HIGHS...ARE CENTERED NEAR
35N130W AND 38N172W. THE FRONTAL BOUNDARY DIVIDES TWO FLOW REGIMES
ACROSS THE ISLANDS...WITH SOUTHEASTERLIES ACROSS MAUI AND THE BIG
ISLAND CONTRASTING WITH NORTHERLIES ACROSS KAUAI.

ALL OF THE MAIN HAWAIIAN ISLANDS EXCEPT KAUAI ARE COVERED BY BROKEN
TO OVERCAST LOW CLOUDS...WITH OAHU...MOLOKAI...LANAI AND MAUI
DIRECTLY AFFECTED BY THE FRONTAL CLOUD BAND. AFTERNOON HEATING
TRIGGERED THE LINGERING BROKEN TO OVERCAST LOW CLOUDS ACROSS THE BIG
ISLAND. NORTHERLY FLOW KEEPS A PALL OF BROKEN STABLE LOW CLOUDS
ACROSS THE NORTHERN HALF OF KAUAI.

$$

POWELL








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