5 PM: Olivia Weakens at It Draws Closer to Hawai‘i

The National Weather Service Central Pacific Hurricane Center in Honolulu issued an update at 5 p.m. on Monday, Sept. 10, 2018.

A Tropical Storm Warning is in now in effect Hawai‘i County, Maui County and O‘ahu.

A Tropical Storm Watch has been issued for Kaua‘i and Ni‘ihau.

At 5 p.m., the center of Tropical Storm Olivia was located near latitude 21.9 north, longitude 149.7 west, about 380 miles ENE of Hilo.

Olivia is moving toward the west near 10 mph. A continued west to WSW motion is expected for the next few days. On the forecast track, Olivia will be moving over the main Hawaiian Islands late Tuesday night into Wednesday.

Maximum sustained winds are near 70 mph with higher gusts. Gradual weakening is forecast during the next 48 hours, but Olivia is expected to remain a tropical storm as it moves across the islands.

Tropical-storm-force winds extend outward up to 90 miles from the center.

POTENTIAL IMPACTS OVERVIEW

WIND: Tropical storm conditions are expected over Maui County and the Big Island starting late Tuesday or Tuesday night. Tropical storm conditions are expected over Oahu starting late Tuesday night or Wednesday morning. Tropical storm conditions are possible over Kaua‘i County starting Wednesday afternoon.

RAINFALL: Olivia is expected to produce total rainfall accumulations of 10 to 15 inches. Isolated maximum amounts of 20 inches are possible, especially over windward sections of Maui County and the Big Island. This rainfall may produce life-threatening flash flooding.

SURF: Large swells generated by Olivia will spread from east to west across the Hawaiian Islands over the next couple of days. This will cause surf to build along exposed east facing shorelines as Olivia approaches. This surf may become damaging across parts of the state.

BELOW: HIGHLIGHTS FROM THE 5 PM NWS LOCAL AREA UPDATE

FOR IN-DPTH LOCAL AREA FORECASTS: Click here

Big Island North and East

Peak Wind Forecast: 20–30 mph with gusts to 45 mph

Peak Storm Surge Inundation: The potential for up to 2 feet above ground somewhere within surge prone areas

Peak Rainfall Amounts: Additional 3-6 inches, with locally higher amounts

South Big Island

Peak Wind Forecast: 10–20 mph with gusts to 30 mph

No storm surge inundation forecast

Peak Rainfall Amounts: Additional 3–6 inches, with locally higher amounts

Kona

Peak Wind Forecast: 20–30 mph with gusts to 40 mph

No storm surge inundation forecast

Peak Rainfall Amounts: Additional around 1 inch

Kohala

Peak Wind Forecast: 20–30 mph with gusts to 40 mph

No storm surge inundation forecast

Peak Rainfall Amounts: Additional 1–3 inches, with locally higher amounts

Interior

Peak Wind Forecast: 20–30 mph with gusts to 45 mph

Peak Rainfall Amounts: Additional 1–3 inches, with locally higher amounts