Satellite Interpretation Message
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000
ATHW40 PHFO 301304
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1250 UTC FRI SEP 30 2016

BASED ON DATA THROUGH 1200 UTC SEPTEMBER 30 2016

SATELLITE INFRARED IMAGERY SHOW CLUMPS OF LOW CLOUDS AND EMBEDDED
SHOWERS MOVING THROUGH THE MAIN HAWAIIAN ISLANDS ALONG WITH THE
TRADE WIND FLOW. THE CLOUDS AND SHOWERS ARE MOVING ALMOST FROM
EAST TO WEST AT 20 TO 25 MPH. THE TOPS OF THE CLOUDS AND SHOWERS
ARE BASICALLY 8 TO 10K FEET BUT A PATCH IN THE KAUAI CHANNEL HAD
TOPS TO 20K FEET. ALSO...THE HEAVIER SHOWERS ARE DRIFTING DOWNWIND
WELL INTO THE LEEWARD DISTRICTS OF THE SMALLER ISLANDS. THE ONLY
REAL DRY AREAS ARE LANAI...AND THE HIGHER ELEVATIONS AND KONA SIDE
OF THE BIG ISLAND. THERE APPEAR TO BE MORE SHOWER-BEARING CLOUDS
UPWIND OF THE ISLANDS. ONE SUCH AREA IS LOCATED 250 MILES EAST-
NORTHEAST OF THE BIG ISLAND. THIS AREA HAS THE LENGTH OF 440 MILES.
IMMEDIATELY TO ITS EAST...IS THE CLOUD MASS OF TROPICAL
DEPRESSION ULIKA...SOME 880 MILES EAST OF THE BIG ISLAND.

WHAT APPEARS TO BE LAYERED MIDDLE AND HIGH LEVEL CIRRUS CLOUDS ARE
MAINTAINING ITS PRESENCE ACROSS THE BIG ISLAND AND MAUI COUNTY.
THE CLOUDS ARE SHOWING SIGNS OF THINNING...HOWEVER. THESE CLOUDS
ARE CONVECTIVE DEBRIS...STEMMING FROM AN AREA OF A CLUSTER OF
CUMULONIMBUS CLOUDS AND THUNDERSTORMS LOCATED 480 MILES SOUTHWEST
OF THE BIG ISLAND.

AS FAR AS MIDWAY ATOLL IS CONCERN...HIGH CIRRUS CLOUDS ARE
SPILLING OVER THE ATOLL FROM THE NORTH. AT THE LOWER LEVELS...
SCATTERED TO BROKEN LOW CLOUDS ARE PRESENT AROUND THE ATOLL. THERE
IS A NEARBY SURFACE RIDGE AS WELL.

ON WATER VAPOR IMAGERY...A DEEP UPPER LEVEL TROUGH REMAINS SOME
800 MILES WEST- NORTHWEST OF KAUAI WITH THE COORDINATES OF 28N164W
TO 26N170W TO 19N180W. AN UPPER LEVEL RIDGE WITH WESTERLY WINDS
LIES OVER THE MAIN HAWAIIAN ISLANDS. THIS FLOW ALOFT CONTINUES
EASTWARD OVER TROPICAL DEPRESSION ULIKA.

TO THE SOUTH OF THE HAWAIIAN ISLANDS...BESIDE THE CLUSTER OF DEEP
CONVECTION...A SMALLER CLUSTER IS NOTED SOME 1300 MILES SOUTHWEST
OF KAUAI BETWEEN 10N AND 07N FROM 173W TO 177W. THE TOPS OF THE
CONVECTION REACHES 54K FEET WITH THE TWO CLUSTERS. LOOSER CONVECTION
IS LOCATED BETWEEN 13N AND 09N FROM 150W TO 161W.


$$
LAU



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