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Hawaii Island Flood Warning for March 17th, 2020

Notice Level: Emergent (Information Update Required - EAS Activated)

Flash Flood Warning for the Island of Hawaii has been issued until 2:15 am Wednesday morning (March 18th) and replaces a Flood Advisory earlier issued for the island. Moderate to heavy rainfall was reported in sporadic areas around Hawaii Island and leading to flooding. (See Post for Further Details)

Published By: HIRSC Team - Hawaii Island (Kamuela - Waimea) Section and Weather Unit

The National Weather Service in Honolulu has issued a * Flash Flood Warning for... The island of Hawaii in Hawaii County * Until 215 AM HST. * At 1125 PM HST, radar indicated moderate to heavy rain over a large portion of the Big Island. The heaviest rain continues to impact the southern half of the island, from Kealakekua to South Point to Wood Valley, and the Hawaii county police department reports that Highway 11 in Kau is closed due to water over the roadway between mile markers 58 and 62. Significant flooding impacts can also be expected elsewhere in the Kau and south Kona districts, and from Kamuela to Waikii. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar indicated. IMPACT...Flooding in drainages, streams, rivers, roads, properties, and other low-lying areas. Public road closures possible in some areas. Landslides are possible in steep terrain. * Some locations that will experience flooding include... Naalehu, Hakalau, Kamuela, Honaunau, Kawaihae, Kealakekua and Kawa Flats. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Warning means that flooding is imminent or occurring within the warned area. Stay away from streams, rivers, drainage ditches, and culverts, even if they are currently dry. Do not cross fast flowing water in your vehicle, or on foot. Turn around, don`t drown. Be especially cautious at night when it is harder to recognize the dangers of flooding. && This warning may need to be extended beyond 215 AM HST if heavy rain persists. This Flash Flood Warning replaces the previously issued Flood Advisory that was in effect for portions of the island of Hawaii in Hawaii County.


The Hawaii Police Department (HPD) reports Highway 11 (Mamalahoa Highway) between the 58 to 62-mile marker in Kawa Flats is closed due to flooding/heavy ponding on the roadway.

No other road or lane closures to report at this time.

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