Water Resources of the United States

PROJECT ALERT NOTICE (HI) Hurricane Lane Impacting the Hawaiian Islands (day 2)

Date: Fri, 24 Aug 2018 14:28:15 EDT

Summary: Category 2 Hurricane Lane is about 180 miles south of Honolulu, and heading north with a variety of impacts to the Hawaiian Islands

The Hawaiian Islands are currently being impacted by Hurricane Lane, a category 2 storm with maximum sustained winds of 110 mph. As of 5 AM HST, Lane was located about 145 miles west-southwest of Kailua-Kona, and about 180 miles south of Honolulu. It is moving north at around 6 mph. The storm has weakened and slowed its movement slightly over the last 24 hours. Lane is a large storm, currently producing rainfall on all of the Hawaiian Islands. Honolulu and Maui Counties are under a Hurricane Warning at this time, Kauai County is under a Hurricane Watch, and Hawaii County (which has improving storm conditions) is now under a Tropical Storm Warning.

Expected impacts of the storm across the state include flooding, storm surge, landslides, and wind damage. As of 8 AM HST on Friday, no USGS streamgages in the state were above National Weather Service Flood Stage. Two streamgages in Hawaii have exceeded flood stage so far during this event, both located on the eastern side of Hawaii Island, and they recorded notable peaks on Thursday. Honolii Stream near Papaikou reached a 17,500 cfs, which was the third highest peak since the record began there in 1967. Wailuku River at Piihonua, which has 90 years of continuous record, reached 82,300 cfs late Thursday, exceeding the previous record peak by 2,100 cfs. The USGS Quarry Rain Gage at Saddle Road on Hawaii Island recorded almost 35 inches of rainfall in the 32 hours preceding 8 AM on Friday, with rain continuing to fall. As Lane moves north and west today and tomorrow, gages in Honolulu and Maui Counties are expected to measure significant amounts of water.

No gages have been damaged or destroyed, and all real-time gages are currently transmitting.

All Pacific Islands Water Science Center Staff are in areas under a Hurricane Warning, and will not be working outdoors today. Some staff are teleworking while sheltering.

Project Alert messages will be posed daily for this event until further notice.

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