High surf warning issued for parts of Big Island as Hurricane Lowell moves north
Surf is forecast for up to 16 feet for south- and west-facing shores of Hawaiʻi Island.
Updated at 4:54 a.m. Sept. 7
A high surf warning is in effect for the Big Island until 6 p.m. Tuesday, according to the National Weather Service.
Surf of 12 to 16 feet is forecast for south-facing shores of the Big Island.
For west facing shores, surf of 6 to 8 feet is forecast for Monday morning and rapidly will build Monday afternoon and evening to 12 to 16 feet.
Expect ocean water surging and sweeping across beaches, coastal benches and lava flows, creating the potential for impacts to coastal properties and infrastructure, including roadways.
Powerful longshore and rip currents will be present at most beaches. Large breaking waves and strong currents may impact harbor entrances and channels causing challenging boat handling.
Stay away from the shoreline along the affected coasts. Be prepared for road closures. Postpone entering or leaving channels affected by the high surf until the surf subsides.
Flood watch
A flood watch is in effect for the entire state, with peak rainfall amounts throughout Kauaʻi County expected at 6 to 10 inches, with maximum totals possibly exceeding 14 inches in some locations.
The Big Island is forecast to receive 2 to 6 inches of rainfall, with isolated totals up to 10 inches possible, while Maui is expected to get 2 to 4 inches of rain, with isolated maximum totals of 8 inches possible. The rest of the main Hawaiian Islands should see 2 to 4 inches of rain.
Rainfall could produce significant flash flooding and mudslides, especially on Kauaʻi and portions of the Big Island.
Storm surge
Localized storm surge is possible for Kauaʻi County, with a potential for 1 to 3 feet of water above ground in areas prone to surge. The time frame of main storm surge concern is Monday afternoon through Tuesday afternoon.
The deepest waters will occur along the immediate coast near and to the right of Lowell’s center, where the surge will be accompanied by large and destructive waves. Surge-related flooding depends on relative timing of the surge and the tidal cycle; it can vary greatly over short distances.
Tornadoes
Late Monday, conditions also will become favorable for fast-moving, short-lived waterspouts and tornadoes in the rainbands associated with Lowell, mainly near Kauaʻi and Niʻihau. This threat continues into Monday night and diminishes quickly Tuesday morning.
Prepare now
Residents and visitors should monitor official forecasts, prepare emergency supplies, charge electronic devices, secure outdoor objects and avoid unnecessary travel as conditions worsen. Never drive, walk or swim through floodwaters.
To receive county emergency alerts, text HAWAIIALERTS to 888777.
Visitors should confirm flights, accommodations and activities directly with airlines, hotels and other providers. Visitor information is available online and by calling 1-800-GOHAWAII.
The public should continue closely monitoring Lowell’s progress. Check National Weather Service forecasts and products for any additional advisories, watches or warnings issued and for specific weather information for your community.
Residents and visitors should continue monitoring official forecasts, prepare emergency supplies, charge electronic devices, secure outdoor objects and avoid unnecessary travel as conditions worsen. Never drive, walk or swim through floodwaters.
Hawaiʻi County Civil Defense encourages residents and businesses to review or develop preparedness plans now, before the next storm arrives.
Contact Civil Defense at 808-935-0031 or visit the Civil Defense website if you have any questions or require assistance.
Check the Hawai‘i County Hazard Impact Map for even more information.
