Satellite Interpretation Message
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000
ATHW40 PHFO 281829
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC SAT MAR 28 2015

BASED ON DATA THROUGH 1800 UTC MARCH 28 2015

WATER VAPOR IMAGERY SHOWED A DRY AIR MASS IN THE MID AND UPPER
ATMOSPHERE OVER AND SURROUNDING THE HAWAIIAN ISLANDS DUE TO AN
UPPER LEVEL RIDGE SITTING OVERHEAD.  THE SOUTHWEST TO NORTHEAST
ALIGNED RIDGE STRETCHED FROM 14N 174W ACROSS THE STATE TO BEYOND
30N 149W.  THIS UPPER RIDGE WAS NEARLY STATIONARY.

A SWATH OF CIRRUS WAS FLOWING OVER THE TOP OR NORTH SIDE OF THE
RIDGE...CENTERED BETWEEN 25N 180E AND 37N 150W AND CONTINUING
FURTHER NORTHEAST TOWARD BRITISH COLUMBIA.  A FRONT...STRADDLED BY
BROKEN TO OVERCAST LAYERED CLOUDS WAS LYING BENEATH THE CIRRUS.  THE
FRONT EXTENDED SOUTHWEST THROUGH 30N 165W TO 23N 180E.  THE FRONT
WAS MOVING EAST NEAR 25 MILES AN HOUR.

A FIELD OF BROKEN TO SCATTERED LOW CLOUDS SAT OVER THE REGION
SURROUNDING THE HAWAIIAN ISLANDS.  THERE WAS A DISTINCT...SHARP
NORTHWEST EDGE TO THIS LOW CLOUD FIELD FROM 30N 154W TO 21N 170W.
THIS APPEARED TO BE DUE TO A GRAVITY WAVE MOVING INTO THE CLOUD
FIELD FROM THE NORTHWEST.  THIS GRAVITY WAVE WAS CLEARING OUT AND
ERODING THE LOW CLOUDS BETWEEN THE CLOUD FIELD AND THE FRONT...AT
LEAST TEMPORARILY.

MEANWHILE...NUMEROUS LOW CLOUDS WERE FLOWING WEST INTO THE BIG
ISLAND THIS MORNING WITH THE STILL PRESENT TRADE WIND FLOW.  FROM
MAUI TO KAUAI...LOW CLOUDS WERE FLOWING TOWARD THE NORTHWEST.  THE
CLOUDS WERE MOVING ALONG BETWEEN 20 AND 25 MILES AN HOUR.

AT 8 AM...SKIES WERE CLOUDY ALONG THE WINDWARD SECTIONS OF THE BIG
ISLAND AND OVER MUCH OF MOLOKAI AND WINDWARD OAHU.  THE REST OF THE
STATE WAS MOSTLY SUNNY.

$$




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