Satellite Interpretation Message
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000
ATHW40 PHFO 281837
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC THU JUL 28 2016

BASED ON DATA THROUGH 1800 UTC JULY 28 2016

LATEST SATELLITE IMAGERY SHOWS A LARGE FIELD OF BROKEN TO OVERCAST
STABLE STRATOCUMULUS /SC/ CLOUDS MOVING OVER THE MAIN HAWAIIAN
ISLANDS FROM THE EAST. WHILE THIS CLOUD FIELD PREVAILS FOR
HUNDREDS OF MILES TO THE EAST OF THE ISLANDS...THE COVERAGE OF
CLOUDS DIMINISHES OVER THE ISLANDS AND ADJACENT WINDWARD
WATERS...WITH SCATTERED TO LOCALLY BROKEN SC NOTED. A FEW SHOWERY
CUMULUS /CU/ ELEMENTS ARE EMBEDDED WITHIN THIS CLOUD FIELD...AND
HAVE DROPPED ISOLATED LIGHT SHOWERS OVER WINDWARD PORTIONS OF THE
ISLANDS IN THE LAST COUPLE OF HOURS. LOW CLOUDS NEAR THE ISLANDS
ARE MOVING TOWARD THE WEST AT SPEEDS BETWEEN 20 AND 25 MPH.

A CLOSE-UP LOOK OF THE ISLANDS REVEALS SCATTERED TO BROKEN SC AND
CU OVER THE EASTERN HALF OF THE ISLAND OF KAUAI...WHILE THE
WESTERN HALF OF KAUAI AND ADJACENT LEEWARD WATERS...INCLUDING
NIIHAU...ARE UNDER MOSTLY SUNNY SKIES THIS MORNING. SCATTERED TO
BROKEN LOW CLOUDS ARE OVER OAHU...WITH A SERIES OF WAVE CLOUDS
SEEN DOWNSTREAM OF THE KOOLAU RANGE. THE NORTHERN HALF...AND THE
EASTERN TIP...OF MOLOKAI IS BLANKETED IN BROKEN TO OVERCAST LOW
CLOUDS WHILE SOUTHWESTERN PORTIONS OF THE ISLAND ARE UNDER MOSTLY
SUNNY SKIES. SCATTERED TO BROKEN LOW CLOUDS ARE OVER INTERIOR
PORTIONS OF LANAI WHILE COASTAL LOCATIONS ARE UNDER SUNNY SKIES.
WINDWARD AREAS ON MAUI...INCLUDING WINDWARD WEST MAUI AND WINDWARD
HALEAKALA...ARE UNDER BROKEN TO OVERCAST SC AND CU...WITH PARTLY
CLOUDY SKIES OVER LEEWARD WEST MAUI. LEEWARD HALEAKALA IS CLEAR AS
IS THE CENTRAL VALLEY AND THE ENTIRE ISLAND OF KAHOOLAWE. SCATTERED
TO LOCALLY BROKEN SC AND CU ARE OVER WINDWARD AREAS OF THE BIG
ISLAND FROM VOLCANO TO OOKALA...WITH FEWER LOW CLOUDS NOTED OVER
THE HAMAKUA COAST. STABLE SC ARE BROKEN TO OVERCAST IN COVERAGE
OVER THE LOWER KONA SLOPES BETWEEN KEAUHOU AND MILOLII...THICKEST
IN COVERAGE OVER HONAUNAU AND CAPTAIN COOK.

WATER VAPOR IMAGERY SHOWS THAT AN AREA OF LIGHT WINDS ALOFT IS
OVER THE ISLANDS...WITH RIDGES ALOFT LOCATED NORTHEAST AND
SOUTHWEST OF THE ISLANDS...AND TROUGHS LOCATED NORTHWEST AND
SOUTHEAST OF THE ISLANDS. THE TROUGH TO THE EAST AND SOUTHEAST
FEATURES A WESTWARD-MOVING CLOSED LOW ALOFT CENTERED NEAR 23N
143W...OR ABOUT 1000 MILES EAST OF OAHU. SCATTERED MODERATE
THUNDERSTORMS ARE LOCATED OVER THE NORTHWESTERN PORTION OF THE
PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT...JUST SOUTHEAST OF
MIDWAY ATOLL. THESE THUNDERSTORMS ARE DEVELOPING IN RESPONSE TO A
WEAK SURFACE TROUGH WHICH CONTAINS THE REMNANTS OF POST-TROPICAL
CYCLONE DARBY AS IT INTERACTS WITH A WEAK TROUGH ALOFT.


$$

BIRCHARD



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