UPDATE: 2:50 p.m.
The flood advisory for Maui has been cancelled.
UPDATE 2:33 p.m.
The flood advisory for Hawaii island issued earlier today has been replaced, with a new advisory now in effect until 5:15 p.m., according to the National Weather Service.
At 2:13 p.m., radar and automated rain gauges indicated heavy rain had moved into Hilo, as well as the Ka’u district between Volcano and Kapapala Ranch, at the rate of one to two inches per hour.
Forecasters in Honolulu said heavy rain is expected to continue in the area for the next several hours.
Updated areas expected to see impacts from the heavy rainfall include Hilo, Hawaiian Paradise Park, Volcano, Glenwood, Wood Valley, Mountain View, Pahala, Hawaiian Acres, Pohakuloa Training Area, Punaluu Beach, Keaau, Orchidlands Estates, Kawa Flats, Papaikou, Pahoa, Pepeekeo, Naalehu and Honomu.
UPDATE 12:26 p.m.
The National Weather Service has added Maui to the list of Hawaiian Islands under a flood advisory this afternoon.
Maui’s advisory is in effect until 3:30 p.m. and was issued after radar indicated heavy rain over leeward slopes of the West Maui Mountains around 12:20 p.m. today.
The most intense rainfall is expected from Lahaina to Napili, with additional rain approaching the island from the south and expected to impact the island within the next hour.
UPDATE: 12:15 p.m.
A flood advisory is in effect for Hawaii island until 3:15 p.m. today due to heavy rains.
At noon, radar indicated heavy rain over the southeast flank of Hawaii island, with the highest rainfall coming over the Kau area at the rate of about one inch per hour.
Areas that could potentially see flooding this afternoon and into the evening include Hawaiian Paradise Park, Wood Valley, Pahala, Hawaii Volcanoes National Park, Punaluu Beach, Naalehu, Glenwood, Mountain View, Hawaiian Ocean View, Hawaiian Acres, Orchidlands Estates, Pahoa, Waiohinu, Fern Forest and Eden Roc.
In addition, Hawaiian Electric Co. says 6,000 customers were without power as of 11:30 a.m. in Mountain View and Volcano, as well as from Hilo Municipal Golf Course to the area of Shipman Ranch and Keeau Town. Crews are responding.
UPDATE: 11:55 a.m.
The National Weather Service in Honolulu has issued a flood advisory for the island of Lanai until 3 p.m. today.
According to the NWS, heavy rain was falling at the rate of one to two inches per hour over Manele Bay around 11:45 a.m. and is expected to spread over the entire island within an hour.
Minor flooding on roads, near streams and in areas with poor drainage is likely due to excessive rainfall.
UPDATE: 11:40 a.m.
The flood advisory for Oahu has been cancelled. A flood advisory is now in effect for Hawaii island until 12:15 p.m.
In addition, Hawaii County Civil Defense reminds residents that all of that island’s beach parks are closed today due to the threat of heavy surf. A high surf warning is in effect today as waves up to 30 feet are expected along north- and west-facing shores.
UPDATE: 11 a.m.
The following watches/warnings/advisories are currently in effect, according to the National Weather Services’ Hawaii Field Office:
>> Flood Watch through Tuesday afternoon for all Hawaiian Islands
>> High Surf Warning until 6 a.m. Monday for Niihau, Oahu North Shore, Olomana, Maui Windward West, Kohala, Kauai North, Koolau Windward, Molokai Windward, Molokai North, Maui Central Valley North, Windward Haleakala, Big Island East, Big Island North.
>> High Wind Warning until 6 a.m. Monday for Haleakala summit, all Big Island summits
>> Blizzard Warning until 6 a.m. Monday for all Big Island summits
>> Wind Advisory until 6 a.m. Monday for Kona, Kohala, Big Island interior, Big Island South, Big Island Southeast, Big Island East, Big Island North
>> High Surf Advisory until 6 a.m. Monday for Kauai Leeward, Waianae Coast, Maui Leeward West, Molokai West
>> Small Craft Advisory until 6 p.m. Monday for all Hawaii waters.
UPDATE: 9:45 a.m.
A flood advisory is in effect for Oahu until 12:45 p.m. today.
At 9:37 a.m., radar showed heavy rainfall taking place over urban Honolulu at the rate of one to three inches per hour and moving over the Koolau Mountains toward Kaneohe and Kailua.
Heavy showers are expected throughout the morning, forecasters said.
Areas that could experience flooding include Honolulu, Waipio, Aiea, Halawa, Moanalua, Salt Lake, Ahuimanu, Kalihi, Pearl City, Kahaluu, Waiahole, Waikane, Manoa, Waikele, Iroquois Point, Maunawili, Waipahu, Mililani and Palolo.
PREVIOUS COVERAGE
A flash flood watch all Hawaiian Islands has been extended through Tuesday afternoon as the National Weather Service in Honolulu says “widespread heavy rainfall and thunderstorms,” which may bring catastrophic flooding and strong southerly winds, remains a threat due to a kona low near the state.
The Hawaii Emergency Management Agency said Saturday that as much as 25 inches of rain could fall across the state over the next few days. Rainfall on Friday and Saturday has already damaged roads and caused localized flooding, along with producing dangerously high surf.
According to the NWS, Maui County and Hawaii island are expected to receive the heaviest rainfall today, with Oahu and Kauai expected to see more rain tonight into Monday. Forecasters say to expect heavy rains potentially until Wednesday, with the highest chance for thunderstorms to occur on Monday and Tuesday when “deep layer shear, instability and moisture axis” could all affect the state.
Normal trade wind patterns are expected to return to the state later in the week as the kona low departs and is replaced by an area of high pressure to the northeast of the state.
HI-EMA asks Hawaii residents to be aware of the following:
>> During heavy rains, or human-made structure failures such as a dam breach, flash flooding can occur quickly and without warning.
>> Be prepared to evacuate and move immediately to higher ground. Do not wait for instructions to act.
>> Do not cross fast-flowing water in your vehicle or on foot – Turn around, do not drown!
>> Contact your property/casualty agent or broker about flood insurance, which is offered through the National Flood Insurance Program.
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Flood advisories for Lanai, Big Isle as heavy rain hits Hawaii - Honolulu Star-Advertiser
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