Satellite Interpretation Message
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000
ATHW40 PHFO 071849
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC TUE JUL 07 2015

BASED ON DATA THROUGH 1800 UTC JULY 07 2015

AS OF 800 AM HST...SATELLITE IMAGERY CONTINUED TO DEPICT THREE MAIN
AREAS OF INTEREST WITHIN THE MONSOON TROUGH SOUTH OF THE MAIN
HAWAIIAN ISLANDS. THE MORE NOTABLE FEATURE...WHICH WILL LIKELY
BECOME A TROPICAL CYCLONE LATER TODAY OR TONIGHT...WAS LOCATED ABOUT
1300 MILES EAST-SOUTHEAST OF HILO...HAWAII. SHOWERS AND
THUNDERSTORMS HAVE BECOME BETTER ORGANIZED BETWEEN 11N AND 16N FROM
137W TO 141W. THIS ACTIVITY WAS TRACKING WEST-NORTHWEST AT 15 TO 20
MPH. THE COLDEST CLOUD TOP TEMPERATURES ASSOCIATED WITH THESE
THUNDERSTORMS RANGED FROM -80 TO -85 DEGREES FAHRENHEIT.

THE SECOND AREA OF INTEREST OR AREA OF LOW PRESSURE WITHIN THE
MONSOON TROUGH WAS LOCATED ABOUT 750 MILES SOUTH-SOUTHEAST OF
HILO...HAWAII. ALTHOUGH THIS SYSTEM REMAINS DISORGANIZED...SHOWERS
AND THUNDERSTORMS CONTINUE TO DEVELOP BETWEEN 9N AND 12N FROM 148W
AND 151W. THE COLDEST CLOUD TOP TEMPERATURES ASSOCIATED WITH THESE
THUNDERSTORMS RANGED FROM -80 TO -85 DEGREES FAHRENHEIT. THIS
ACTIVITY WAS NEARLY STATIONARY.

THE THIRD AREA WAS LOCATED ABOUT 1100 MILES SOUTH-SOUTHWEST OF
HONOLULU...HAWAII. SHOWERS AND THUNDERSTORMS CONTINUED TO GRADUALLY
BECOME BETTER ORGANIZED BETWEEN 5N AND 10N FROM 165W TO 175W. CLOUD
TOP TEMPERATURES HAVE WARMED OVER THE PAST SIX HOURS AND RANGED FROM
-60 TO -70 DEGREES FAHRENHEIT. THIS ACTIVITY WAS SLOWLY MOVING
TOWARD THE NORTH OR NORTHWEST.

THE PRESSURE GRADIENT BETWEEN THE PREVIOUSLY DISCUSSED ACTIVITY
SOUTH OF THE ISLANDS AND A RIDGE OF HIGH PRESSURE TO THE NORTH HAS
TIGHTENED...WHICH HAS LED TO STRONGER TRADE WINDS OVER THE ISLANDS.
SCATTERED CUMULUS CLOUDS WERE SHOWN TRACKING WESTWARD WITHIN THE
TRADE WINDS AT OR AROUND 20 MPH. MOST OF THE CLOUD COVERAGE ACROSS
THE ISLANDS THIS MORNING HAVE BEEN MOSTLY FOCUSED ALONG THE WINDWARD
COASTS OF THE ISLANDS. ELSEWHERE...MOSTLY CLEAR SKIES WERE DEPICTED.
CLOUD TOPS RANGED FROM 10 TO 15 THOUSAND FEET OR LESS.

A BAND OF CUMULUS CLOUDS ASSOCIATED WITH A STATIONARY FRONTAL
BOUNDARY EXTENDED SOUTHWEST FROM 30N163W TO 24N171W. THE LEADING
EDGE OF THIS ACTIVITY WAS APPROXIMATELY 540 MILES NORTHWEST OF
KAUAI. THIS BAND WAS GRADUALLY TRACKING SOUTH AND SOUTHEAST. MAXIMUM
CLOUD TOPS WERE AROUND 15 TO 20 THOUSAND FEET WITHIN THIS BAND.

$$

AG





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