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Flash flood watch extended for Hawaii

UPDATE: 7 a.m.

The flash flood warning for Hawaii island has been canceled.

The floodwaters on Highway 11 at Kawa Flats have receded and no other significant rainfall is occurring on the island, according to the National Weather Service.

Wednesday, 5:20 a.m.

A flash flood warning for the Big Island has been extended through 7:15 a.m. today.

Radar and rain gauges at 3:55 a.m. showed persistent to heavy rainfall across the south and east of the island, from Hawaiian Ocean View Estates to Pahoa to Hilo, according to the National Weather Service. Rain was falling at a rate up to 1 to 2 inches per hour.

Highway 11 remains closed near Kawa Flats due to water covering the roadway, according to Hawaii County Police.

Meanwhile, a flash flood watch for all islands has been extended through Thursday afternoon.

The kona low west of the state will continue to produce bands of heavy rain and thunderstorms across portions of the island chain through Thursday, the NWS said.

A wind advisory is also in effect for the Big Island summits through 6 p.m. today. Forecasters expect north winds of 40 to 50 mph with localized gusts over 60 mph.

9:30 p.m.

A winter weather advisory is in effect for Big Island summits above 12,000 feet in elevation.

Snow accumulations of up to 6 inches are expected. The advisory is through 6 p.m. Wednesday.

A flood advisory issued earlier for Maui has expired. A flash flood watch remains in effect for the entire state through Wednesday afternoon.

6 p.m.

A flood advisory for is in effect for Maui until 8:15 tonight.

Radar this afternoon indicated moderate to heavy rainfall continuing over Maui. Rain was falling at a rate of 1 to 2 inches per hour over the slopes of Haleakala. This band of rainfall is moving east toward Kaupo and Hana.

3:45 p.m.

A flash flood watch for the entire state has been extended through Wednesday afternoon.

“A kona low west of the state will continue to produce bands of heavy rain and thunderstorms across portions of the island chain through Wednesday. While all islands could experience flooding rainfall, the greatest risk for flooding will be on Kauai and Oahu, where soils remain saturated due to recent heavy rain,” the National Weather Service said.

2:45 p.m.

The National Weather Service said a strong thunderstorm will affect Maui this afternoon.

A thunderstorm was located over Lahaina at 2:40 today and is moving east at 20 mph. Winds in excess of 30 mph are possible with the storm.

Locations to be impacted include Kahului, Kihei, Lahaina, Honokohau, Kahakuloa, Wailuku, Paia, Wailea,

Waihee, Napili-Honokowai, Kapalua, Puunene, Waikapu, Waiehu, Makena, Maalaea, Ulupalakua, Kaanapali, Olowalu and Keokea.

2 p.m.

A flash flood warning is in effect for Kauai until 3:45 p.m. today.

Rainfall that started Monday night and continued through today has ended, but stream gauges are still showing high water levels, the National Weather Service said this afternoon. The Kauai Emergency Management Agency reported that Kuhio Highway remains closed at Hanalei Bridge but flooding in other parts of the island has subsided.

1 p.m.

The flash flood warning for Oahu expired at 1 p.m. today, while the Kauai warning has been extended to 3:45 p.m. A flash flood watch is also in place for all Hawaiian Islands. A flood advisory for the island of Molokai remains in effect until 4:30 p.m.

A severe thunderstorm watch is in effect for Maui County until 5 p.m. as the storm moves east. Forecasters warned of winds of 58 mph or more.

11:40 a.m.

A flash flood warning has been issued for both Oahu and Kauai, as heavy storms soak the western island and triggered tornado warnings Kauai earlier today.

“At 11:05 a.m., radar and rain gauges showed that rainfall rates have been decreasing on Oahu. The Department of Emergency Management reported that Farrington Highway at Upena Street is flooded. Flood prone portions of Ahua Street in Mapunapuna have deep ponding. Parts of the H-1 freeway in Honolulu have flooded lanes but the freeway remains open,” the National Weather Service said. Forecasters earlier warned that urban flooding was expected from Waipahu to Honolulu.

Honolulu Zoo closed for the day at 11 a.m. because of “severe ponding” and flooded walkways.

The warning for Oahu lasts through 1 p.m. today, while the Kauai warning runs through 12:45 p.m. A flash flood watch is also in place for all Hawaiian Islands.

A severe thunderstorm watch is in effect for Maui County until 5 p.m. as the storm moves east. Forecasters warned of winds of 58 mph or more.

A tornado warning for Kauai expired at 6:15 a.m. after the storm that prompted it overnight began to weaken, according to weather officials.

Radar detected it at 5:48 a.m., according to NWS meteorologist Chevy Chevalier, prompting the rare warning. NWS has received no damage reports so far.

The weather service warned that a “Kona low” west of the state will continue to bring heavy rain and thunderstorms across parts of Hawaii through tonight, and into Wednesday, with the greatest risk for flooding on Kauai and Oahu.

The flash flood warning for Kauai County includes, but is not limited to, Lihue, Kalaheo and Hanamaulu, while a high surf advisory for south and east shores remains in effect through 6 p.m. today.

Flooding was reported in Waimea Town after 9 a.m.

At 7:38 a.m., radar and rain gauges showed rain falling at more than 2 inches per hour in the Wailua and Kapaa areas. Officials warned of water levels running very high at the South Fork of Wailua River, and that facilities near its mouth may be prone to flooding.

Kaumualii Highway between Halewila Road and Laulea Street is closed due to water on the road. Traffic has been diverted to Halewili Road, according to the state Department of Transportation.

Also, DOT said it closed the Kuhio Highway southbound contraflow between Kapule Highway and the temporary bypass at 9:30 a.m. today to deploy resources to flooded areas.

Kauai County has announced the following closures due to the flash flood warning:

>> Kekaha Landfill is closed, along with all refuse transfer stations until further notice.

>> Kuhio Highway near Hanalei Bridge remains closed due to flooding until further notice.

>> The Department of Water has issued a water conservation notice for Wainiha-Haena until further notice.

>> Kauai Police have reported heavy ponding and low visibility on roadways.

>> Power outages are occurring across the island.

A flash flood watch is in effect for all isles through early Wednesday morning due to the “Kona low” several hundreds miles west of the state, which continues to bring bands of heavy rain and thunderstorms.

While Kauai was pummeled overnight and this morning, Oahu is expected to get much wetter by this afternoon. Showers are also likely for Maui County today. And snow is also possible for Big Island summits later today or tonight.

On Oahu, the peak rain rates were measured at 1 to 2 inches per hour. The rain is moving eastward, and expected to affect urban areas along South Oahu.

Clouds and winds are in the forecast, with highs ranging from 77 to 82 degrees Fahrenheit, and east winds of 15 to 30 mph. Lows tonight range from 69 to 74 degrees.

The “Kona low” is expected to lift to the north on Thursday and Friday, bringing relief from east to west across the state.

PREVIOUS COVERAGE

10:15 a.m.

A flash flood warning has been issued for Oahu through 1 p.m. today.

“At 10:03 a.m., radar showed a large area of heavy rainfall spreading across Oahu. Rain gauges reported several areas with 1 to 2 inch per hour rates and radar estimates showed isolated areas with rates greater than 3 inches per hour. Urban flooding is expected from Waipahu to Honolulu shortly.”

9:25 a.m.

A flood advisory has been posted for Oahu through noon today.

At 8:54 a.m., radar showed a large area of heavy rain moving onshore from Kalaeloa to Kaena Point, according to the National Weather Service. Peak rain rates measured at 1 to 2 inches per hour. The area of rain is expected to spread eastward over the next several hours, affecting urban areas.

Locations in the advisory include, but are not limited to, Honolulu, Hauula, Mililani, Wahiawa, Waialua, Schofield Barracks, Kaneohe Marine Base, Kahaluu, Ahuimanu, Punaluu, Salt Lake and Kaneohe.

8:45 a.m.

An earlier severe thunderstorm watch for the island of Kauai has expired, but there is now one in effect for Honolulu.

The severe thunderstorm watch is in effect for Honolulu through 11 a.m. today, according to the National Weather Service. Severe thunderstorms can produce damaging winds of 58 mph or higher or destructive hail the size of quarters or larger.

The flash flood warning for the island of Kauai is still in effect through 9:45 a.m.

6:50 a.m.

The flash flood warning for the island of Kauai has been extended through 9:45 a.m. today.

At 6:24 a.m., radar and rain gauges showed heavy rain continuing over many areas of Kauai with the most intense rainfall of 3 to 4 inches per hour falling between Hanapepe and Waimea, according to the National Weather Service.

The water level in Hanalei River remains high and Kuhio Highway is still closed at the Hanalei Bridge.

6:25 a.m.

Although a flash flood warning remains in effect for Kauai through 6:45 a.m. today, earlier severe weather warnings have expired.

A tornado warning and severe thunderstorm warning expired at 6:15 a.m. However, a severe thunderstorm watch is now in effect for the island through 9 a.m.

A severe thunderstorm watch means conditions are favorable for severe thunderstorms.

5:55 a.m.

National Weather Service officials have issued a tornado warning for the island of Kauai through 6:15 a.m. today.

At 5:48 a.m., a severe thunderstorm capable of producing a tornado was located near Kaumakani, moving north at 20 mph.

Flying debris will be dangerous to those caught without shelter.

Tuesday, 5:15 a.m.

A new severe thunderstorm warning and a flash flood warning have been posted for the island Kauai today.

The severe thunderstorm warning and flash flood warning are in effect through 6 a.m. and 6:45 a.m. today, respectively.

At 5:13 a.m., a severe thunderstorm was located southwest of Kohala, moving northeast at 10 mph, according to the National Weather Service.

Weather officials said to expect 60 mph gusts and resulting damage to roofs, siding and trees. Very heavy rainfall is expected to continue over the island at rates up to 2 to 3 inches per hour.

People should move to an interior room on the lowest floor of the building they’re in and stay away from windows for their protection. They’re also advised to avoid streams, rivers, drainage ditches and culverts, even if they are dry.

Monday, 9:55 p.m.

The storm which prompted a severe thunderstorm warning has weakened below severe limits and no longer poses an immediate threat to life or property, the National Weather Service said. The severe thunderstorm warning has been canceled, but the island is still under a flash flood warning.

“Heavy rain is still possible with this thunderstorm,” said forecasters, who issued the flash flood warning for the island until 12:45 a.m. Tuesday.

“At 9:41 p.m., radar and rain gauges indicated heavy rain falling over the entire island of Kauai. Rain was falling at a rate of 2 to 3 inches per hour. Additionally, area streams and rivers are rapidly rising, including the Halaulani Stream and Waimea River,” forecasters said. “Flash flooding is expected to begin shortly.”

9:15 p.m.

A severe thunderstorm warning has been issued through 10 p.m. for Kauai.

The National Weather Service said that wind gusts may reach over 60 mph.

“Radar this evening indicated a severe thunderstorm near Kalaheo and moving north at 20 mph,” forecasters said.

“A severe thunderstorm warning means torrential rainfall is occurring with this storm, and may lead to flash flooding,” the warning said. “For your protection move to an interior room on the lowest floor of a building. Stay away from windows.”

Do not drive your vehicle through flooded roadways. Ponding, low visibility and other hazardous driving conditions are expected. If you must drive, please do so with extreme caution.

Kuhio Highway near Hanalei Bridge remains closed due to elevated river levels and a public shelter is open at Hanalei Elementary School, officials said

For updates on road conditions and closures, please call 241-1725. Please do not call Kaua‘i police 911 unless you have an emergency.

4:30 p.m.

A brown water advisory has been issued for Oahu beaches on the North Shore and windward side.

Heavy rain has resulted in stormwater runoff entering coastal waters. The public is advised to stay out of flood waters and storm water runoff due to possible overflowing cesspools, sewer, manholes, pesticides, animal fecal matter, dead animals, pathogens, chemicals and associated flood debris.

The Department of Health said not all coastal areas may be impacted, but stay out if the water is brown.

2:30 p.m.

The flash flood warning for Kauai County has been extended to 5:45 p.m. today.

At about 2:30 p.m., the Kauai Emergency Management Agency reported that Kuhio Highway remained closed at Hanalei Bridge.

Radar indicated that rainfall had eased across the island, but water levels in the rivers and streams remain high.

Officials warn of flooding in drainages, streams, rivers, roads, and other low-lying areas. Public road closures are also possible in some areas. Landslides are possible in steep terrain.

Noon

A flash flood warning has been issued for the island of Kauai through 2:45 p.m. today.

At 11:45 a.m., the Hanalei River gauge showed a rapid rise in water level, according to the National Weather Service. Kuhio Highway will likely be closed shortly due to flooding. Radar showed heavy rain over most of the island with ground conditions already saturated.

Additional rainfall will continue moving over Kauai from the south for the next several hours.

11 a.m.

A flood advisory has been issued for the island of Oahu through 1:30 p.m. and a flood advisory for Kauai has been extended through 1:30 p.m. as well.

The National Weather Service says at 10:35 a.m., radar indicated an area of heavy rainfall moving northwest over Oahu. The most intense rainfall was observed over Hawaii Kai and Honolulu at rates of 1 to 2 inches per hour. Forecasters expect another area of intense rainfall to move onshore near Ewa Beach, Pearl Harbor and Central Oahu.

Officials warn the public to stay away from streams, drainage ditches and low-lying areas prone to flooding. Rainfall and runoff will also cause hazardous driving conditions due to ponding, reduced visibility and poor braking action. Individuals should not cross fast flowing or rising water in a vehicle, or on foot.

PREVIOUS COVERAGE

A flash flood watch is in place for all isles, while a high surf advisory is in place for the south and east shores of Kauai County.

Increasing rains are expected across Hawaii today as a “Kona low” sets up west of Kauai today, according to weather forecasters.

The National Weather Service said all isles remain under an elevated threat of heavy rain and flash flooding through at least Tuesday. The “Kona low” is expected to produce bands of heavy rain and thunderstorms as it moves from west to east across the state through Tuesday, and possibly into Wednesday.

These heavy shower bands may also tap into stronger winds aloft, producing wind gusts up to 40 mph today and tomorrow near Kauai and Oahu, which are at greatest risk. Snow is also expected on Big Island summits.

A flood advisory is in place for the island of Kauai through 10:30 a.m. today.

At 7:15 a.m., radar and rain gauges indicated that rainfall continued at rates of 1 to 2 inches per hour along the east side of Kauai. Stream gauges also showed elevated water levels, especially in Hanakapiai Stream and Wainiha River.

A high surf advisory has also been issued for the south and east shores of Niihau and Kauai due to a combination of strong, southeast winds and large seas. Surf is expected to rise to 5 to 8 feet on those shores through Tuesday afternoon.

Officials warn of strong, breaking waves and rip currents, making swimming difficult and dangerous. Beachgoers should heed all advice from ocean safety officials.

Today’s skies are expected to be mostly cloudy, with showers, and isolated thunderstorms. Highs are expected to range from 75 to 80 degrees Fahrenheit, with southeast winds of 15 to 25 mph. Lows tonight range from 67 to 72 degrees.

Forecasters said unsettled weather is expected to remain through the end of this week. While easterly trades and drying trends are expected on Friday, as the low moves further north away from the state.

A small craft advisory also remains in place for most Hawaiian waters — from northwest Kauai to windward Big Island waters — through 6 p.m. Tuesday.

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