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Hawaii Island Flood Warning for March 18th, 2020

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

Flash Flood Warning for the Island of Hawaii has extended until 4:15 am Wednesday morning (March 18th). Moderate to heavy rainfall was reported in sporadic areas around Hawaii Island and leading to flooding and road closure in Ka'u. (See Post for Further Details)

Published By: HIRSC Team - Utah (Springdale) 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 415 AM HST. * At 130 AM HST, radar showed that heavy rain was gradually diminishing over the Kau district, but Highway 11 remains closed near Kawa Flats due to water covering the roadway. Elsewhere, slow- moving torrential rain, with rates between 2 and 3 inches per hour, was impacting the area from Laupahoe to Hilo to Volcano, with additional heavy rain over the northern portion of the island. 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... South Kona, Kau, Puna, Hilo and Hamakua districts. 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. && This warning may need to be extended beyond 415 AM HST if heavy rain persists. This Flash Flood Warning replaces the previously issued Flash Flood Warning 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 remains closed due to flooding/heavy ponding on the roadway.

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

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