Satellite Interpretation Message
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000
ATHW40 PHFO 300512
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
0530 UTC TUE SEP 30 2014

BASED ON DATA THROUGH 0500 UTC SEPTEMBER 30 2014

WATER VAPOR IMAGES SHOWED AN AREA OF LOW PRESSURE IN THE MIDDLE
ATMOSPHERE OVER AND SOUTHWEST OF THE MAIN HAWAIIAN ISLANDS. ISOLATED
TOWERING CUMULI DEVELOPED UNDER THIS FEATURE...PRIMARILY TO THE
SOUTHWEST OF THE ISLANDS...WHILE STRONG THUNDERSTORMS PERSISTED OVER
THE OCEAN WELL TO THE NORTHEAST OF MAUI COUNTY AND KAUAI. LAYERED
MIDDLE TO HIGH DEBRIS CLOUDS FROM THIS AND EARLIER CONVECTION MOSTLY
TO PARTLY OBSCURED LOWER FEATURES WITHIN THE AREA BOUNDED BY THE
CURVE FROM 28N 155W TO 27N 152W TO 24N 147W TO 19N 154W TO 24N 157W.

TO THE NORTHWEST...A BAND OF DEEP LAYERED CLOUDS AND EMBEDDED
ISOLATED THUNDERSTORMS ASSOCIATED WITH A WEAKENING FRONT EXTENDED
OVER HAWAIIAN WATERS WITHIN 120 MILES OF THE LINE FROM 30N 163W TO
24N 167W AND FURTHER NORTHEAST. THUNDERSTORMS ALSO ASSOCIATED WITH
THE FRONT DEVELOPED WITHIN 90 MILES OF THE POINT 26N 178W. FRAGMENTS
OF CLOUD LAYERS SHEARING OFF OF THE MAIN CLOUD BAND PARTLY TO MOSTLY
OBSCURED LOWER FEATURES WITHIN 200 MILES OF THE LINE FROM 27N 167W
TO 23N 180 AND FURTHER SOUTHWEST.

TO THE SOUTHEAST THROUGH SOUTHWEST...LIGHT THUNDERSTORM ACTIVITY
CONTINUED IN THE ITCZ FROM 11N TO 03N. LAYERED MIDDLE TO HIGH DEBRIS
CLOUDS FROM THIS AND EARLIER CONVECTION MOSTLY OBSCURED LOWER
FEATURES FROM 12N TO 01N. THINNER HIGH CLOUD LAYERS FOLLOWING A JET
STREAM OUT OF THE ITCZ ALSO MOSTLY TO PARTLY OBSCURED LOWER FEATURES
WITHIN 120 MILES OF THE CURVE FROM 17N 148W TO 16N 157W TO 12N 168W
TO 10N 169W.

OTHERWISE...CLOUD COVER ACROSS HAWAIIAN WATERS CONSISTED MAINLY OF
CLUMPS AND BANDS OF MARINE STRATOCUMULI AND STRATUS EAST OF ABOUT
160W. THE MOST SIGNIFICANT BAND EXTENDED FROM EAST TO WEST ROUGHLY
ALONG 23N. INDIVIDUAL SMALL CUMULI ALSO WERE PRESENT THROUGHOUT.
THESE CLOUDS GENERALLY MOVED TOWARD THE WEST AT AROUND 15 MILES AN
HOUR...AND ROSE TO HEIGHTS OF 8000 TO 10000 FEET...THOUGH TALLER
CUMULI APPROACHED 15000 FEET.

ACROSS THE MAIN HAWAIIAN ISLANDS...CLOUD COVER CONSISTED MOSTLY OF
AFTERNOON CUMULUS BUILDUPS OVER HIGHER TERRAIN INLAND...THOUGH
MARINE CUMULI AND STRATOCUMULI ALSO MOVED ASHORE ALONG SLOPES FACING
EAST. TWO THUNDERSTORMS WERE PRESENT ON THE BIG ISLAND...THE
STRONGER ONE OVER EAST-CENTRAL KAU DISTRICT...AND THE WEAKER ONE
ALONG THE BORDER BETWEEN NORTH AND SOUTH HILO DISTRICTS. AN EVEN
STRONGER THUNDERSTORM PERSISTED OVER THE COASTAL WATERS TO THE
SOUTHWEST OF OAHU. DISSIPATING FORMER THUNDERSTORMS ALSO WERE
PRESENT OVER WEST KAUAI AND WEST LANAI. AREAS WITH THE LEAST CLOUD
COVER WERE LIMITED MAINLY TO NIIHAU...NORTHEAST KAUAI...THE WEST
THREE QUARTERS OF OAHU...MOLOKAI...SOUTHEAST LANAI...THE CENTRAL
ISTHMUS ON MAUI...THE SUMMIT AND SOUTH SLOPES OF HALEAKALA ON
MAUI...AND THE SUMMIT OF MAUNA KEA ON THE BIG ISLAND.

RADAR DATA FROM NEAR THE ISLANDS SHOWED AREAS OF HEAVY RAIN OVER
EAST-CENTRAL KAU DISTRICT...THE COASTAL WATERS TO THE SOUTHWEST OF
OAHU...AND WELL OFFSHORE TO THE NORTHEAST OF MAUI COUNTY. RADAR
DATA ALSO SHOWED AREAS OF RAIN ALONG THE BORDER BETWEEN NORTH AND
SOUTH HILO DISTRICTS AND OVER NORTHWEST LANAI. ELSEWHERE...RADAR
DATA SHOWED ISOLATED SHOWERS AT MOST.

$$

RYSHKO




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