Hawaii Island Flood Information Update for January 12th, 2020

Notice Level: Urgent (Action Needed - Update # 1 for 1/12/2020)


Flash Flood Warning remains in effect for the East Hawaii Districts of Hawaii Island until 4:30 am Sunday morning (January 12th). Reports of Rainfall rates of 2+ inches per hour was recorded in a South Hilo Rain Gauge. Heavy rains have been recorded in gauges from Honoka'a to South Point.


Wailuku River height peaked at 21.4-feet with a discharge flow rate of 50,100 cubic feet per second on Saturday. The river level and discharge rate had slowly decreased since Saturday evening. Residences along the Wailuku River corridor continue to be on notice to prepare to evacuate if needed, should conditions worsen.


Rain also began falling in parts of West Hawaii, however, no significant amounts were recorded as of 1:00 am Sunday morning. No Advisories or Warnings were in effect for West Hawaii districts.


A couple of road closures were still in effect as of 1:15 pm Sunday morning. Also, no evacuation orders have been made at this time. The Afook-Chinen Auditorium - Butler Building shelter has been opened and any residences wanting to evacuate should do so before flooding occurs.

The National Weather Service in Honolulu has issued a * Flash Flood Warning for... The island of Hawaii in Hawaii County

* Until 430 AM HST. * At 107 AM HST, radar and rain gages indicated heavy rainfall continues over windward and southeast facing slopes of the Big Island. The most intense area of rainfall was over the slopes from Hilo to South Point with rates of more than 2 inches per hour, closing Highway 11 at Kawa Flats. This rainfall will cause water levels in already swollen streams to rise further. Heavy rain along the Hamakua Coast will also continue to cause flooding problems along the Belt Highway between Honomu and Honokaa. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar and rain gages. 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... Hilo, Naalehu, Waipio Valley, Orchidlands Estates, Hawi, Pepeekeo, Keaau, Hawaiian Paradise Park, Kawa Flats, Pahoa, Kapaau and Hawaiian Acres. 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. The heavy rains may cause rock and mudslides in steep terrain areas. && This warning may need to be extended beyond 430 AM HST if heavy rain persists.

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