Public Advisory for HURRICANE ISELLE

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HURRICANE ISELLE ADVISORY NUMBER 25

Issued: 500 AM HST WED AUG 06 2014

Hurricane Iselle weakens as it tracks toward the main Hawaiian islands

SUMMARY OF 500 AM HST...1500 UTC...INFORMATION

LOCATION: 17.0N 144.5W
ABOUT 720 MI: 1155 KM ESE OF HILO HAWAII
ABOUT 925 MI: 1485 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS: 85 MPH: 140 KM/H
PRESENT MOVEMENT: WNW OR 285 DEGREES AT 15 MPH: 24 KM/H
MINIMUM CENTRAL PRESSURE: 985 MB or 29.09 INCHES

DISCUSSION AND 48-HOUR OUTLOOK

At 500 am HST, 1500 UTC, the center of hurricane Iselle was located near latitude 17.0 north, longitude 144.5 west. Iselle is moving toward the west-northwest near 15 mph, 24 km/h. This general motion is expected to continue through Thursday night, with a gradual increase in forward speed. On this forecast track, the outer winds of Iselle may reach the easternmost Hawaiian islands by Thursday afternoon.

Maximum sustained winds are near 85 mph, 140 km/h, with higher gusts. Additional weakening is forecast through Thursday, and Iselle is expected to be a tropical storm later today or tonight.

Hurricane force winds extend outward up to 30 miles, 45 km, from the center, and tropical storm force winds extend outward up to 140 miles, 220 km.

The estimated minimum central pressure is 985 mb, 29.09 inches.

HAZARDS AFFECTING LAND

WIND

Tropical storm conditions are possible on the Big Island of Hawaii on Thursday. These adverse weather conditions may spread to Maui county and Oahu Thursday night or Friday.

SURF

Swells generated by Iselle are expected to reach the main Hawaiian islands today, possibly becoming damaging along some coastlines starting late tonight or Thursday.

RAINFALL

Heavy rains associated with Iselle are expected to reach the Big Island Thursday and spread to the remainder of the state Thursday night and Friday. These rains could cause life-threatening flash floods and mud slides.

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

$$
FORECASTER HOUSTON