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448
ATHW40 PHFO 301822
SIMHI

HAWAIIAN ISLANDS SATELLITE INTERPRETATION MESSAGE
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
1830 UTC WED JUL 30 2014

BASED ON DATA THROUGH 1800 UTC JULY 30 2014

WATER VAPOR IMAGERY INDICATES AN UPPER LEVEL LOW PRESSURE TROUGH
RESIDES ALONG AN AXIS FROM 30N149W TO OAHU TO 13N180E WHILE A WEAK
NORTHEAST TO SOUTHWEST ORIENTED UPPER LEVEL RIDGE IS CENTERED NEAR
16N137W.

CLOSER TO THE SURFACE...A STATIONARY FRONT IS LOCATED ALONG A CURVE
FROM 30N177W TO 27N180E WITH CUMULUS AND ISOLATED TOWERING CUMULUS
CLOUDS WITHIN 100 MILES OF THE FRONT. WITHIN THE INTER TROPICAL
CONVERGENCE ZONE...ITCZ...WHICH IS MEANDERING ALONG 10N WEST OF 150W
AND UP TO 16N EAST OF 150W...THERE ARE A FEW AREAS OF SUSTAINED
CONVECTION.

THE MOST SIGNIFICANT IS TROPICAL DEPRESSION GENEVIEVE. THE CENTRAL
PACIFIC HURRICANE CENTER IS ISSUING ADVISORIES ON TROPICAL
DEPRESSION GENEVIEVE. THE SYSTEM IS LOCATED ABOUT 560 MILES
SOUTHEAST OF HILO...AND IS MOVING W AROUND 7 MPH. THIS SYSTEM HAS
WINDS OF 35 MPH GUSTING TO 45 MPH. LAYERED AND CUMULONIMBUS CLOUDS
ASSOCIATED WITH GENEVIEVE COVER MUCH OF THE AREA BETWEEN 10.3N TO
15.3N AND 148.4W TO 152.8W...WITH CLOUD TOPS RANGING FROM 50 TO 58
THOUSAND FEET. FOR FURTHER INFORMATION ABOUT TROPICAL DEPRESSION
GENEVIEVE...PLEASE SEE BULLETINS UNDER WMO HEADER WTPA32 PHFO OR
AWIPS HEADER HFOTCPCP2.

THE SECOND AREA OF SUSTAINED CONVECTION IS CENTERED NEAR 12N164W.
THE CUMULONIMBUS CLOUDS EXTEND OUT 200 MILES FROM ITS CENTER. THIS
AREA OF CONVECTION IS MOVING SLOWLY TO THE WEST WITH CLOUD TOPS
RISING TO NEAR 51 THOUSAND FEET. A THIRD AREA OF CONVECTION HAS JUST
ENTERED THE AREA IN THE LAST FEW HOURS AND IS CENTERED NEAR 16N
140W. IT IS MORE COMPACT COMPARED TO THE OTHER TWO AREAS WITH
CUMULONIMBUS CLOUDS EXTENDING OUT ABOUT 100 MILES FROM ITS CENTER
WITH CLOUD TOPS RISING TO AROUND 54 THOUSAND FEET.

ALSO ASSOCIATED WITH THE ITCZ ARE THE CIRRUS CLOUDS BEING ADVECTED
TO THE NORTHEAST. THEY ARE SOUTH OF A CURVE FROM 14N180E TO 16N170W
TO 18N160W TO 20N150W TO 25N140W.

IN THE VICINITY OF THE MAIN HAWAIIAN ISLANDS...SCATTERED
STRATOCUMULUS AND CUMULUS CLOUDS HAVE PUSHED UP AGAINST SOME OF THE
WINDWARD SLOPES THIS MORNING WITH TOPS BETWEEN 6000 AND 9000 FEET.
TO THE NORTHEAST OF THE ISLANDS A LARGE AREA OF CLOUD COVER IS
MOVING TOWARD THE STATE. THE CLOUDS ARE RISING TO HEIGHTS AROUND
12000 FEET AND ARE MOVING TO THE WEST-SOUTHWEST AROUND 15 MILES PER
HOUR. AT 1800 UTC...NIIHAU AND KAHOOLAWE ARE SUNNY. KAUAI...OAHU
AND THE BIG ISLAND ARE MOSTLY CLOUDY ALONG WINDWARD SLOPES AND
COASTS...AND MOSTLY SUNNY LEEWARD. MOLOKAI...MAUI AND LANAI ARE
MOSTLY CLOUDY ON WINDWARD SLOPES AND MOSTLY SUNNY ELSEWHERE.

$$

EVANS







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