Satellite Interpretation Message
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000
ATHW40 PHFO 231835
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC TUE SEP 23 2014

BASED ON DATA THROUGH 1800 UTC SEPTEMBER 23 2014

REGIONAL SATELLITE IMAGERY SHOWS A MODERATE TRADE WIND FLOW IN PLACE
OVER THE MAIN HAWAIIAN ISLANDS...WITH WEAKLY ORGANIZED...EAST-
NORTHEAST TO WEST-SOUTHWEST ORIENTED...SHOWERY CLOUD LINES SEEN
NEAR AND NORTH OF KAUAI AND OAHU. SCATTERED LOW CLOUDS ARE ALSO SEEN
OVER WINDWARD WATERS EAST OF MAUI COUNTY AND THE BIG ISLAND...BUT
THESE CLOUDS ARE RANDOMLY ORGANIZED.

ON KAUAI...SCATTERED TO LOCALLY BROKEN LOW CLOUDS ARE OVER THE
ISLAND...AND PREVAIL OVER WATERS OUT TO 200 MILES TO THE NORTH...
WHILE LEEWARD NEAR SHORE WATERS AND NIIHAU ARE UNDER MOSTLY SUNNY
SKIES. MOST OF OAHU IS UNDER BROKEN LOW CLOUDS...WITH VISIBLE
IMAGERY REVEALING ABOUT 8 WAVE CLOUDS...WITH A SPACING OF ABOUT 3
MILES...TO THE WEST OF THE KOOLAU RANGE...AND OVER THE ISLAND AND
ADJACENT NEAR SHORE LEEWARD WATERS...ADDING TO THE OVERALL
CLOUDINESS. WHILE WINDWARD MOLOKAI AND WINDWARD MAUI HAVE SCATTERED
TO LOCALLY BROKEN LOW CLOUDS ALONG THE LOWER SLOPES...THE REMAINDER
OF MAUI COUNTY IS UNDER SUNNY SKIES. WHILE BROKEN TO OVERCAST STABLE
LOW CLOUDS ARE OVER THE LOWER WINDWARD SLOPES OF THE BIG
ISLAND...AND A FEW SHOWERY LOW CLOUDS ARE MOVING ASHORE NEAR
HILO...THE REMAINDER OF THE ISLAND IS UNDER MOSTLY SUNNY SKIES. LOW
CLOUDS NEAR THE ISLANDS ARE MOVING TOWARD THE WEST-SOUTHWEST AT
SPEEDS BETWEEN 25 AND 30 MPH.

LOOKING NORTH OF THE ISLANDS...AND NORTH OF THE WEAKLY ORGANIZED
AREAS OF SHOWERY LOW CLOUDS OVER WATERS WITHIN 200 MILES NORTH OF
KAUAI...A WEAK FRONT IS NOTED. THE FRONT TIES INTO A POWERFUL LOW
WEST OF OREGON AND WASHINGTON...WITH THE FRONT ALONG A LINE FROM
30N141W TO 27N153W TO 28N167W...OR ABOUT 450 MILES NORTH OF OAHU.
SCATTERED TO BROKEN SHOWERY LOW CLOUDS MARK THE BOUNDARY SOUTH OF
30N...WITH THE FRONT MOVING SOUTH AT 10 TO 15 MPH. TO THE SOUTH OF
THE ISLANDS...A WESTWARD-MOVING LOW LEVEL TROUGH IS PASSING JUST
SOUTH OF THE HAWAIIAN OFFSHORE WATERS...AND IS PRODUCING SCATTERED
THUNDERSTORMS FROM 12N TO 16N BETWEEN 151W AND 156W. OTHER RANDOMLY
SCATTERED THUNDERSTORM CLUSTERS ARE LOCATED FROM 4N TO 11N BETWEEN
148W AND THE DATE LINE.

WATER VAPOR IMAGERY SHOWS A SOMEWHAT COMPLEX PATTERN ALOFT OVER THE
TROPICAL AND SUB-TROPICAL CENTRAL NORTH PACIFIC...WITH A RIDGE ALOFT
CENTERED NORTHWEST OF THE ISLANDS NEAR 30N169W...AND SOUTH OF THE
ISLANDS NEAR 12N160W. BETWEEN THE RIDGES...AN EAST TO WEST ORIENTED
TROUGH ALOFT IS ALONG 19N...AND THUS TRANSECTS THE BIG ISLAND. THE
TROUGH TIES IN TO WEAK LOWS ALOFT CENTERED EAST OF THE ISLANDS NEAR
20N146W AND WEST OF THE ISLANDS NEAR 17N173W. A CLUSTER OF
THUNDERSTORMS ASSOCIATED WITH THE LOW TO THE WEST HAS BEEN A
PROLIFIC LIGHTNING PRODUCER OVER THE PAST 6 TO 8 HOURS...WITH THESE
THUNDERSTORMS ABOUT 800 TO 1250 MILES WEST OF THE BIG ISLAND...
MAINLY FROM 17N TO 20N BETWEEN 169W AND 176W.

$$

BIRCHARD




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