Hurricane Olivia

Updated: 9/14/2018 3:20:12 AM
Olivia has been downgraded to a Tropical Depression with winds of 35 mph and is moving rapidly toward the west-southwest far from Hawaii. Flooding and rainfall continues across the islands.
Officials in Hawaii said Thursday that up to 10,000 residents of Oahu may need to leave their homes after heavy rains from Tropical Storm Olivia filled the Nuuanu Reservoir to near capacity, though they later said there was no danger that the dam would fail.
The Honolulu Board of Water Supply (BWS) said the water level in the reservoir rose 4 to 5 feet overnight and was approximately 18 inches below the spillway of Nuuanu Dam No. 1. Honolulu Fire Department were "deployed at the dam with water pumps to bring the level of the reservoir down further." The spillway could be used to release water from the dam, but that would cause some flooding downstream.
"This is not a dam breach situation right now," BWS Chief Engineer Ernie Lau told reporters Thursday. "We're nowhere close to that."
The agency, which is the water utility for nearly 1 million people in Honolulu and surrounding towns on Oahu, said it would coordinate with the city on any evacuation notice.
Andrew Pereira, a spokesman for the city, urged residents to be aware of the situation.
Source: DORRIS
Updated: 9/11/2018 2:02:42 AM
Hurricane Olivia will likely approach Hawaii as either a high-end tropical storm or a low-end hurricane in coming days, weather forecasters said Monday.
“The difference between the two is very slight, so we really need to prepare as if it’s a hurricane,” said Maureen Ballard, a meteorologist at the Central Pacific Hurricane Center.
Olivia was 700 kilometers east of Hilo and moving 15 kph at 11 a.m. local time. It had maximum sustained winds of 120 kph.
Source: DORRIS

Published Monday, September 10, 2018

Hurricane Olivia, the 15th named storm of the 2018 Pacific hurricane season, is intensifying as it tracks toward Hawaii.

Little change in strength is forecast through late Monday (HST), with gradual weakening possible starting sometime Tuesday, September 11.

Persons on all of the main Hawaiian Islands should continue preparing for the likelihood of direct impacts from this system Monday and early Tuesday, September 10 and 11.

Those impacts could include intense flooding rainfall, damaging winds, large and dangerous surf, and storm surge.

At 09:00 UTC on Monday, September 10, the center of Hurricane "Olivia" was located about 880 km (545 miles) ENE of Hilo and 1 140 km E of Honolulu, Hawaii. Its maximum sustained winds were 140 km/h, making it a Category 1 hurricane on the Saffir-Simpson scale.

This general motion is expected to continue through early Monday (HST), followed by a turn toward the WSW starting late Monday. This WSW motion is expected to continue through Tuesday evening. On this forecast track, tropical storm conditions are possible over some parts of Hawaii starting Tuesday.

A Tropical Storm Watch is in effect for Oahu, Maui County, including the islands of Maui, Molokai, Lanai and Kahoolawe, and Hawaii County.
A Tropical Storm Watch means that tropical storm conditions are possible in the watch area.
A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous.

A Tropical Storm Warning may be required for some areas that are in the watch area on Monday. Interests on Kauai and Niihau should closely monitor the progress of Olivia, NHC said.

Regardless of the exact track and intensity that Olivia takes as it approaches the islands, significant effects often extend far from the center. In particular, the mountainous terrain of Hawaii can produce localized areas of strongly enhanced winds and rainfall, even well away from the tropical cyclone center.
Source: DORRIS

Hurricane Olivia Facts

Power: 1
Affected Area: 300 km.
Alert Level: Green
Category: Met
Response: Assess
Severity: Moderate
Urgency: Future
Certainty: Observed

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