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TROPICAL STORM FLOSSIE INTERMEDIATE ADVISORY NUMBER 15A

Issued: 800 AM HST SUN JUL 28 2013

Flossie maintains strength as it continues to move toward the Hawaiian islands

SUMMARY OF 800 AM HST...1800 UTC...INFORMATION

LOCATION: 19.8N 147.5W
ABOUT 490 MI: 790 KM E OF HILO HAWAII
ABOUT 680 MI: 1090 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS: 65 MPH: 100 KM/H
PRESENT MOVEMENT: W OR 275 DEGREES AT 20 MPH: 32 KM/H
MINIMUM CENTRAL PRESSURE: 996 MB or 29.41 INCHES

WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT

A TROPICAL STORM WARNING IS IN EFFECT FOR:
*HAWAII COUNTY
*MAUI COUNTY, INCLUDING THE ISLANDS OF MAUI, MOLOKAI, LANAI AND
KAHOOLAWE

A TROPICAL STORM WATCH IS IN EFFECT FOR
*OAHU

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED WITHIN THE WARNING AREA WITHIN 36 HOURS.

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA WITHIN 48 HOURS.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA, PLEASE MONITOR
PRODUCTS ISSUED BY THE HONOLULU NWS FORECAST OFFICE.

DISCUSSION AND 48-HOUR OUTLOOK

At 800 am HST, 1800 UTC, the center of tropical storm Flossie was located near latitude 19.8 north, longitude 147.5 west. Flossie is moving toward the west near 20 mph, 32 km/h, and this motion is expected to continue through the next 48 hours, with a slight slowing in forward speed.

Maximum sustained winds are near 65 mph, 100 km/h, with higher gusts. Gradual weakening is forecast during the next 48 hours.

Tropical storm force winds extend outward up to 175 miles, 280 km from the center.

Estimated minimum central pressure is 996 mb, 29.41 inches.

HAZARDS AFFECTING LAND

WIND

Tropical storm conditions are expected to reach the Big Island and Maui county Monday morning, and are possible on Oahu Monday night.

RAINFALL

Heavy rainfall is expected to begin as early as Monday morning over Hawaii county and Monday afternoon over Maui county, with heavy rain spreading to Oahu by Monday night. Flossie is expected to produce total rainfall amounts of 6 to 10 inches over the Big Island and Maui county, with isolated maximum amounts of 15 inches possible, mainly windward. Rainfall amounts of 4 to 8 inches are possible over Oahu, with isolated maximum amounts of 12 inches possible, mainly windward. This rainfall could cause life- threatening flash floods and mud slides, especially in the mountains.

SURF

Dangerously large surf will begin to impact east facing shores of the islands as early as tonight with the largest surf expected on Monday into Tuesday. Be aware that large surf can cause coastal road closures, even before the storm arrives. Please consult the latest hurricane local statement for information specific to your area.

NEXT ADVISORY
NEXT COMPLETE ADVISORY...1100 AM HST.

$$
FORECASTER POWELL