WTPA33 PHFO 071442
TCPCP3
BULLETIN
HURRICANE ISELLE ADVISORY NUMBER 30
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI EP092014
500 AM HST THU AUG 07 2014
...DANGEROUS ISELLE BEARING DOWN ON THE BIG ISLAND...
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
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LOCATION...18.5N 150.6W
ABOUT 305 MI...490 KM ESE OF HILO HAWAII
ABOUT 510 MI...825 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...986 MB...29.12 INCHES
WATCHES AND WARNINGS
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CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
A TROPICAL STORM WARNING HAS BEEN ISSUED FOR KAUAI COUNTY.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
A HURRICANE WARNING IS IN EFFECT FOR...
* HAWAII COUNTY
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* MAUI COUNTY...INCLUDING THE ISLANDS OF MAUI...MOLOKAI...LANAI...
AND KAHOOLAWE.
* OAHU
* KAUAI COUNTY INCLUDING THE ISLANDS OF KAUAI AND NIIHAU.
A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA. PREPARATIONS TO PROTECT LIFE AND
PROPERTY SHOULD BE RUSHED TO COMPLETION.
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.
INTERESTS IN THE NORTHWEST HAWAIIAN ISLANDS SHOULD MONITOR THE
PROGRESS OF ISELLE.
FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR
PRODUCTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN
HONOLULU HAWAII.
DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 500 AM HST...1500 UTC...THE CENTER OF HURRICANE ISELLE WAS
LOCATED NEAR LATITUDE 18.5 NORTH...LONGITUDE 150.6 WEST. ISELLE IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 17 MPH...28 KM/H...AND THIS
MOTION IS EXPECTED TO CONTINUE THROUGH FRIDAY...WITH SOME SLOWING
IN FORWARD SPEED ON FRIDAY NIGHT. ON THE FORECAST TRACK...THE
CENTER OF ISELLE IS EXPECTED TO PASS OVER THE BIG ISLAND
TONIGHT...AND PASS JUST SOUTH OF THE SMALLER ISLANDS FRIDAY.
MAXIMUM SUSTAINED WINDS ARE NEAR 80 MPH...130 KM/H...WITH HIGHER
GUSTS. SOME WEAKENING IS FORECAST DURING THE NEXT 48 HOURS...BUT
ISELLE IS EXPECTED TO BE NEAR HURRICANE STRENGTH AS IT MAKES
LANDFALL ON THE BIG ISLAND TONIGHT.
HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 35 MILES...55 KM...FROM
THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 140
MILES...220 KM.
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 986 MB...29.12 INCHES.
HAZARDS AFFECTING LAND
----------------------
WIND...THE ONSET OF TROPICAL STORM CONDITIONS IS EXPECTED ON THE
BIG ISLAND OF HAWAII THIS AFTERNOON...WITH HURRICANE CONDITIONS
EXPECTED TONIGHT. TROPICAL STORM CONDITIONS ARE EXPECTED OVER MAUI
COUNTY TONIGHT...OVER OAHU ON FRIDAY...AND OVER KAUAI COUNTY ON
FRIDAY AFTERNOON.
SURF...VERY LARGE AND DAMAGING SURF IS EXPECTED TO RAPIDLY BUILD
ALONG EAST AND SOUTH FACING SHORES TODAY AND TONIGHT...ESPECIALLY ON
THE BIG ISLAND.
RAINFALL...RAINFALL TOTALS OF 5 TO 8 INCHES...WITH ISOLATED MAXIMUM
AMOUNTS TO 12 INCHES...ARE EXPECTED ALONG THE TRACK OF ISELLE.
THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AS WELL AS
ROCK AND MUD SLIDES.
STORM SURGE...THE COMBINATION OF A DANGEROUS STORM SURGE AND THE
TIDE WILL CAUSE NORMALLY DRY AREAS NEAR THE COAST TO BE FLOODED BY
RISING WATERS. THE WATER COULD REACH THE FOLLOWING HEIGHTS ABOVE
GROUND IF THE PEAK SURGE OCCURS AT THE TIME OF HIGH TIDE...
BIG ISLAND WINDWARD AND KAU...1 TO 3 FT
THE HIGHEST WATER WILL OCCUR ALONG THE IMMEDIATE COAST IN AREAS OF
ONSHORE FLOW. THE SURGE WILL BE ACCOMPANIED BY LARGE AND DAMAGING
WAVES. SURGE RELATED FLOODING DEPENDS ON THE RELATIVE TIMING OF THE
SURGE AND THE TIDAL CYCLE...AND CAN VARY GREATLY OVER SHORT
DISTANCES.
NEXT ADVISORY
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NEXT INTERMEDIATE ADVISORY...800 AM HST.
NEXT COMPLETE ADVISORY...1100 AM HST.
$$
FORECASTER BIRCHARD
