Public Advisory for HURRICANE ISELLE

Raw Text File

HURRICANE ISELLE ADVISORY NUMBER 32

Issued: 500 PM HST THU AUG 07 2014

Iselle continuing to approach the Big Island

SUMMARY OF 500 PM HST...0300 UTC...INFORMATION

LOCATION: 19.1N 153.8W
ABOUT 95 MI: 150 KM ESE OF HILO HAWAII
ABOUT 305 MI: 490 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS: 75 MPH: 120 KM/H
PRESENT MOVEMENT: W OR 280 DEGREES AT 15 MPH: 24 KM/H
MINIMUM CENTRAL PRESSURE: 992 MB or 29.30 INCHES

WATCHES AND WARNINGS

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY,

NONE.

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 pm HST, 0300 UTC, the center of hurricane Iselle was located near latitude 19.1 north, longitude 153.8 west. Iselle is moving toward the west near 15 mph, 24 km/h, and this motion is expected to continue with some slowing in forward speed over the next couple of days. On the forecast track, Iselle will be moving over the Big Island tonight, and passing south of the smaller islands on Friday and Friday night.

Data from the u.s. Air force hurricane hunters indicate that maximum sustained winds are near 75 mph, 120 km/h, with higher gusts. Weakening is forecast over the next 48 hours, but Iselle could still be a hurricane when it reaches the Big Island. Iselle is forecast to weaken to a tropical storm overnight.

Hurricane force winds extend outward up to 35 miles, 55 km, from the center, and tropical storm force winds extend outward up to 185 miles, 295 km.

The estimated minimum central pressure is 992 mb, 29.30 inches.

HAZARDS AFFECTING LAND

WIND

Tropical storm conditions will reach the Big Island this evening with hurricane conditions likely in some areas overnight. Tropical storm conditions are expected over Maui county tonight, and for Oahu on Friday. Tropical storm conditions are expected for Kauai county later Friday.

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.

SURF

Swells generated by Iselle will continue to build along east facing shores tonight. Very large, damaging waves are expected along mainly east and south shores through Friday.

STORM SURGE

The combination of 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 2 ft.

Surge related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances.

NEXT ADVISORY
NEXT INTERMEDIATE ADVISORY...800 PM HST.
NEXT COMPLETE ADVISORY...1100 PM HST.

$$
FORECASTER R BALLARD