Satellite Interpretation Message
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000
ATHW40 PHFO 240530
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC THU APR 24 2014

BASED ON DATA THROUGH 0500 UTC APRIL 24 2014

A BRISK TRADE WIND FLOW PREVAILS OVER THE HAWAIIAN ISLANDS THIS
EVENING...WITH VARYING AMOUNTS OF LOW CLOUDS TRACKING TOWARD THE
ISLANDS...AND STACKING UP ALONG WINDWARD COASTS AND SLOPES. THE
STRONG TRADES ARE BRIEFLY PUSHING THESE SCATTERED TO BROKEN LOW
CLOUDS OVER LEEWARD AREAS OF THE SMALLER ISLANDS...WHILE THE LEEWARD
COAST AND SLOPES OF THE BIG ISLAND AND ADJACENT NEAR SHORE WATERS...
FROM KEAHOLE POINT TO SOUTH POINT...ARE UNDER BROKEN TO OVERCAST LOW
CLOUDS. LOW CLOUDS AND SHOWERS NEAR THE ISLANDS ARE MOVING TOWARD
THE WEST-SOUTHWEST AT 25 TO 30 MPH.

ON KAUAI...THE LEEWARD...OR WESTERN...HALF OF THE ISLAND IS UNDER
NEARLY CLEAR SKIES AS OF BULLETIN TIME...WITH CLEAR SKIES OVER
NIIHAU AND ADJACENT WATERS. THE WINDWARD SIDE OF THE ISLAND...AND
THE NORTH SHORE...ARE UNDER SCATTERED TO BROKEN CUMULUS /CU/ AND
STRATOCUMULUS /SC/. MOST OF OAHU IS CURRENTLY UNDER SCATTERED TO
BROKEN SHOWERY CU...EXCEPT FOR THE SOUTHWEST CORNER OF THE
ISLAND...WHERE FEW CU ARE SEEN. FEW TO SCATTERED LOW CLOUDS PREVAIL
OVER THE ISLANDS OF MAUI COUNTY...AND ADJACENT WATERS...WHILE A
CLOUDIER EVENING IS UNDERWAY OVER THE WINDWARD SIDE OF THE BIG
ISLAND...WHERE BROKEN TO OVERCAST CU AND SC ARE OVER THE
SLOPES...WHILE THE ADJACENT WINDWARD WATERS CURRENTLY ONLY CONTAIN
SCATTERED CU.

RANDOMLY DISTRIBUTED PATCHES OF LOW CLOUDS PREVAIL UPSTREAM OF THE
ISLANDS FOR SEVERAL HUNDRED MILES...AND LACK SIGNIFICANT
ORGANIZATION. A 500 TO 700 MILE LONG...75 TO 100 MILE WIDE...EAST
TO WEST ORIENTED BAND OF BROKEN CU LIES OVER WATERS TO THE NORTH AND
NORTHEAST OF KAUAI...BUT APPEARS TO BE MOVING ON A TRAJECTORY THAT
WOULD KEEP IT NORTH OF THE ISLANDS. THE PORTION OF THE TROPICAL
CENTRAL NORTH PACIFIC WEST AND NORTHWEST OF THE MAIN HAWAIIAN
ISLANDS IS UNDER FEW TO SCATTERED CU...WITH DRY CONDITIONS
PREVAILING FROM 10N TO 30N BETWEEN 160W AND THE DATE LINE. LOW
CLOUDS ARE IN GREATER CONCENTRATION TO THE EAST AND NORTHEAST OF THE
ISLANDS...WITH SCATTERED TO LOCALLY BROKEN LOW CLOUDS SEEN FROM 10N
TO 30N E OF 160W.

PATCHES OF SCATTERED TO BROKEN HIGH-LEVEL CIRRUS CLOUDS ARE NOTED
ABOUT 200 TO 1200 MILES NORTHEAST OF THE ISLANDS...AND WATER VAPOR
IMAGERY SHOWS THESE CLOUDS ARE ASSOCIATED WITH A NORTHEAST TO
SOUTHWEST ORIENTED TROUGH ALOFT...AND A DISSIPATING EMBEDDED LOW
ALOFT...THAT IS ABOUT 300 MILES NORTHEAST OF THE ISLANDS. THIS
BROAD TROUGH HAS AN AXIS THAT PASSES NORTH OF KAUAI...ALONG A LINE
FROM 30N154W TO 24N165W TO 19N180...WITH A WESTERLY FLOW ALOFT
PREVAILING OVER THE ISLANDS.

$$

BIRCHARD





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