Satellite Interpretation Message
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000
ATHW40 PHFO 300526
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC FRI SEP 30 2016

BASED ON DATA THROUGH 0500 UTC SEPTEMBER 30 2016

SATELLITE INFRARED IMAGERY SHOWS GOOD SIZE PATCHES OF LOW CLOUDS
AND EMBEDDED SHOWERS MOVING THROUGH THE MAIN HAWAIIAN ISLANDS THIS
HOUR...BEING CARRIED WESTWARD WITH THE LOW LEVEL TRADE WINDS
CLOCKED AT AROUND 20 MPH. THE TOPS OF THE CLOUDS AND SHOWERS ARE
BETWEEN 8 AND 10K FEET. ABOUT ALL OF THE MAIN HAWAIIAN ISLANDS ARE
BEING AFFECTED. A RATHER LARGE PATCH THAT JUST REACHED MAUI WILL
KEEP THE ISLANDS DOWNWIND SHOWERY AS THE EVENING PROGRESSES...
WHILE A COUPLE OF SMALLER FRAGMENTED PATCHES LOCATED JUST TO THE
EAST OF THIS LARGE PATCH WILL AFFECT WINDWARD BIG ISLAND ISLAND IN
THE HOURS AHEAD.

SOME OF THESE TRADE SHOWERS ARE SPILLING OVER THE LEE SIDE OF THE
SMALLER ISLANDS. LEEWARD BIG ISLAND ALSO HAS A FEW SHOWERS OF THEIR
OWN WITH ONE AFFECTING KAILUA-KONA TOWN THIS PAST HOUR.

CONVECTIVE DEBRIS...OR CIRRUS CLOUDS, IS SPREADING NORTHWARD AND
IS ABOUT TO COVER ALL OF THE BIG ISLAND. THE CIRRUS CLOUDS ARE
FROM AN AREA OF SCATTERED CUMULONIMBUS CLOUDS AND THUNDERSTORMS
LOCATED BETWEEN 350 AND 600 MILES TO THE SOUTH AND SOUTHWEST OF
THE BIG ISLAND.

ELSEWHERE...A 400 MILE WIDE AREA OF LOW CLOUDS AND SHOWERS
LOCATED JUST TO THE WEST OF TROPICAL STORM ULIKA AND ABOUT 400
MILES EAST OF THE BIG ISLAND CONTINUES TO MOVE WEST WITH THE
TRADES.

TO THE WEST OF KAUAI...LOW CLOUD COVERAGE THINS OUT TO SCATTERED
WEST OF 170W. A RIDGE OF HIGH PRESSURE IS NOTED FROM 30N173W TO
28N180W. THIS PUT MIDWAY ATOLL UNDER THIS RIDGE WITH A LIGHT
SOUTHERLY WINDS AND FAIR SKIES.

WATER VAPOR IMAGERY SHOWS A DEEP UPPER LEVEL TROUGH 800 MILES
WEST-NORTHWEST OF KAUAI WITH THE AXIS FROM 29N165W TO 19N180W.
WATER VAPOR ALSO SHOW UPPER LEVEL RIDGING OVER THE MAIN HAWAIIAN
ISLANDS UNDER A WESTERLY WIND FLOW ALOFT. THE FLOW IS TAKING SOME
OF THIS CIRRUS OVER THE BIG ISLAND EASTWARD TO NEAR WHERE TROPICAL
STORM ULIKA IS AT.

AS NOTED ABOVE...THE AREA OF SCATTERED CONVECTION SOUTH OF THE
BIG ISLAND IS CONCENTRATED BETWEEN 15N AND 10N FROM 150W TO 165W.
THE TOPS OF THESE CB/S ARE AS HIGH AS 52K FEET. A SECOND SMALLER
AND WEAKER AREA OF CB/S IS LOCATED SOME 1100 MILES SOUTHWEST OF
KAUAI BETWEEN 14N AND 06N FROM 170W TO 180W.


$$
LAU



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