Satellite Interpretation Message
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000
ATHW40 PHFO 180539
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC THU SEP 18 2014

BASED ON DATA THROUGH 0500 UTC SEPTEMBER 18 2014

THE INFRARED SATELLITE IMAGERY OF THE CENTRAL NORTH PACIFIC SHOWS A
LARGE FIELD OF BROKEN LOW CLOUDS COVERING THE SMALLER OF THE MAIN
HAWAIIAN ISLANDS. THE AREA EXTENDED ROUGHLY 300 MILES TO THE WEST
NORTHWEST OF KAUAI...TO 400 MILES NORTH OF OAHU...AND TO 850 MILES
NORTHEAST OF MAUI. THE SOUTHERN FRINGE TO THIS CLOUD MASS HAS JUST
REACHED THE SMALLER OF THE MAIN HAWAIIAN ISLANDS AND IS PUSHING TO
THE SOUTH AND SOUTHWEST AT ABOUT 10 MPH. THERE IS A SLIVER OF HIGH
CIRRUS CLOUDS MOVING THROUGH OAHU FROM THE SOUTHWEST.

A VERY NARROW ZONE OF FAIR SKIES SEPARATED THIS AREA NOTED ABOVE
WITH THAT OF A FRONTAL CLOUD BAND. THE WIDTH OF THIS BAND STARTED
OFF WITH 180 MILES WITH THE MID POINT STRETCHING FROM 23N140W TO
22N145W. IT THEN NARROWS TO 90 MILES BETWEEN 22N145W AND 20N153W.
THIS FRONT CONTINUES TOWARD THE NORTHEAST TO THE CENTRAL CALIFORNIA
COAST. THE PORTION OF THE FRONT BETWEEN 153W AND 140W APPEARS TO BE
WEAKENING AS IT MOVES SLOWLY SOUTHEASTWARD.

THE BIG ISLAND IS SPARED OF THESE TWO CLOUD MASSES. HOWEVER...DAYTIME
HEATING RESULTED IN AFTERNOON CLOUDS THAT CONTINUE TO COVER THE
UPPER SLOPES WEST OF HILO AND THE HAMAKUA COAST...THE KAU
SLOPES...AND THE KONA DISTRICTS PRIMARILY SOUTH OF A LINE FROM KONA
AIRPORT TO THE HUMUULA SADDLE. THE CLOUDS STEERED CLEAR OF BOTH
MAUNA LOA AND MAUNA KEA SUMMITS ALL DAY...HOWEVER.

WATER VAPOR IMAGERY SHOWS A SOUTHWESTERLY WIND FLOW HIGH ABOVE THE
ISLANDS. A WEAK UPPER LEVEL LOW IS NOTED NEAR 23N163W OR 210 MILES
WEST OF KAUAI. A TROUGH EXTENDED EASTWARD FROM THE LOW...NORTH OF
THE ISLANDS...THROUGH 25N155W AND 25N150W.

IN THE TROPICS...THE DEEPEST CONVECTION IS AT 09N156W OR 685 MILES
SOUTH OF THE BIG ISLAND. IT HAS A CLOUD TOP OF 55000 FEET. LESS
INTENSE THUNDERSTORMS ARE MAINLY ISOLATED BETWEEN 15N AND 08N FROM
140W TO 165W.

$$

LAU






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