Update: Flash flood warning canceled, advisory in place for all Hawai‘i Island

11:20 p.m. Sunday update: A flash flood warning is canceled for portions of East Hawai‘i as Hurricane Hone, now a tropical storm, moves away from the Big Island.

A flood advisory is in effect till 2:15 a.m. on Monday. The flood advisory was issued for all of Hawai‘i Island.

At 11:13, radar at the National Weather Service in Honolulu indicated periods of heavy rain over
the Big Island. Rain was falling at a rate of up to 1 inch per hour along a shower band moving through the Kona District.

Water ponding remains over some Big Island roadways and water levels remain high in local streams due to recent heavy rainfall.

8:45 p.m. Sunday update: A flash flood warning for portions of Hawai‘i Island is once again extended till 12:30 a.m. on Monday.

At 8:39 p.m., radar showed bands of moderate to heavy rain moving into the windward slopes and southeast flank of the Big Island. Rain rates are falling around 1 inch per hour, with the potential for heavier showers developing in the 1 to 2 inches per hour range later tonight.

Periods of heavy showers over the windward and southeastern slopes on already saturated ground may quickly lead to additional flash flooding. Water levels in area rivers and streams will likely continue to run high through the night.

Some areas along the affected windward and southeastern slopes remain flooded at this time.

Flooding is anticipated in drainages, streams, rivers, roads, properties, and other low-lying areas. Landslides are possible in steep terrain.

Some locations that will experience flash flooding include Hilo, Hawaiian Paradise Park, Kapa‘au, Honoka‘a, Pōhakuloa Training Area, Pohakuloa Camp, Volcano, Glenwood, Mountain View, Hawai‘i Volcanoes National Park, Wood Valley, Pāhala, Hawaiian Acres, Papa‘ikou, Kea‘au, Honomū, Pepe‘ekeo, Orchidlands Estates and Laupahoehoe.

6:11 p.m. Sunday update: The flash flood warning for portions of the Big Island was extended till 9:15 p.m.

At 5:33 p.m., radar showed bands of heavy rain moving into the windward slopes and southeast flank of the Big Island. Rain rates have briefly increased with rates of up to 3 inches per hour.

The heaviest rain was generally falling over the slopes of South Hilo and Puna districts. In the Ka‘ū District, Highway 11 remains closed at Kawa Flats, and Wood Valley Road and Cane Haul Road remain closed near Pāhala.

Rainfall rates have decreased in these areas and emergency management reported that water is receding but roads still remain closed. Bands of heavy rainfall will continue through the evening hours, but rainfall should gradually decline tonight.

Some locations that will experience flash flooding include Hilo, Hawaiian Paradise Park, Kapa‘au, Honoka‘a, Pōhakuloa Training Area, Pōhakuloa Camp, Volcano, Glenwood, Mountain View, Hawai‘i Volcanoes National Park, Wood Valley, Pāhala, Hawaiian Acres, Papa‘ikou, Kea‘au, Honomū, Pepe‘ekeo, Orchidlands Estates and Laupahoehoe.

3:25 p.m. Sunday update: Hone is moving west away from the islands and all tropical storm warnings have been discontinued, according to the National Weather Service Sunday.

The flash flood warning for portions of the Big Island was extended till 6:15 p.m.

At 2:55 p.m., radar showed bands of moderate to locally heavy rain moving into the southeast flank of the Big Island. Rain rates have generally decreased during the past few hours, but radar continues to show pockets of rain rates of up to 2 inches per hour.

In the Ka‘ū District, Highway 11 remains closed at Kawa Flats, and Wood Valley Road and Cane Haul Road remain closed near Pāhala. There have been reports of flooding across the roads of
Nā‘ālehu.

In the North Kohala District, Homestead Road remains closed. Bands of heavy rainfall will continue through the afternoon hours as Hurricane Hone moves westward and away from the
Big Island.

A wind advisory is in effect till 6 a.m. Monday. Areas under advisory are Kohala, Big Island Interior and East Hawai‘i.

Northeast winds of 30 to 40 mph with localized gusts over 50 mph are anticipated.

7:45 a.m. Sunday update: A tropical storm warning remains in effect throughout the Big Island as Hurricane Hone passes by.

A flash flood warning for portions of Hawai‘i Island remains in effect till 9:15 a.m.

At 5:49 a.m., radar showed heavy rainfall continuing to impact the southeast flank of the Big Island. The highest rain rates were 1 to 2 inches per hour over the Hawai‘i Volcanoes National Park and Wood Valley.

In the Ka‘ū District, Highway 11 remains closed at Kawa Flats, and Wood Valley Road and Cane Haul Road remain closed near Pāhala.

In the Puna District, North Kulani Road remains closed. Heavy rainfall will continue through the morning hours as Hurricane Hone moves westward to the southwest of the Big Island.

Some locations that will experience flash flooding include Hilo, Hawaiian Paradise Park, Kapa‘au, Honoka‘a, Pōhakuloa Training Area, Pōhakuloa Camp, Volcano, Glenwood, Mountain View, Hawai‘i Volcanoes National Park, Wood Valley, Pāhala, Hawaiian Acres, Papa‘ikou, Keaau, Honomū, Pepe‘ekeo, Orchidlands Estates and Laupahoehoe.

A high warning was canceled but a surf advisory is in place for all east-facing shores as a large and disorganized short period swell associated with Hurricane Hone will bring elevated surf today.

Original post: Tropical storm Hone strengthened to a hurricane Saturday night as it passed south of South Point, according to the National Hurricane Center.

As a result of the hurricane, several weather advisories have been extended.

A hurricane warning is in effect through Sunday.

A tropical storm warning remains in effect for Hawai‘i County. According to the National Weather Service, portions of the Big Island continue to see sustained surface winds around 30 to 40 mph and gusts over 50 mph, while a few sites in and around Kohala Ranch have gusted over 60 mph.

Strong winds will continue through the morning hours and will likely become locally damaging. Sustained winds over 40 mph and gusts above 60 mph are expected for portions of the Big Island, especially for areas downslope from higher terrain and through passes.

This includes areas like the Humuula Saddle, the Waimea Saddle, leeward Kohala, and South Point.

A flood advisory is canceled, however, a flash flood warning is now in effect till 3:15 a.m.

At 12:25 a.m., rainfall over the Ka‘ District has intensified with rain rates up to 2 inches per hour occurring between Nā‘ālehu and South Point. Heavy rainfall also continued over the windward
slopes of the Big Island.

The Hawaii County Civil Defense Agency reported that North Kulani Road has been closed due to the overflow of a nearby flood retention basin. Heavy rainfall will continue through the night as Hurricane Hone passes south of the Big Island.

Flooding in drainages, streams, rivers, roads, properties, and other low-lying areas is anticipated. Public road closures are possible in some areas.

Landslides are possible in steep terrain.

Some locations that will experience flash flooding include Hilo, Hawaiian Paradise Park, Kapa‘au, Honoka‘a, Pōhakuloa Training Area, Pōhakuloa Camp, Volcano, Glenwood, Mountain View, Hawai‘i Volcanoes National Park, Wood Valley, Pāhala, Hawaiian Acres, Papa‘ikou, Kea‘au, Honomū, Pepe‘ekeo, Orchidlands Estates and Laupahoehoe.

At 10:38 p.m. on Saturday, rain bands started moving over the Ka‘ū District. Heavy rainfall also continued over windward slopes with peak rates of 1 inch per hour over the South Hilo and Puna Districts.

Heavy rainfall will continue over the windward slopes and are expected to intensify over the slopes of the Ka‘ū District over the next several hours.

Some locations that will experience flooding include Hilo, Hawaiian Paradise Park, Kapa‘au, Honoka‘a, Pōhakuloa Training Area, Pōhakuloa Camp, Volcano, Glenwood, Mountain View, Hawai‘i Volcanoes National Park, Wood Valley, Pāhala, Nā‘ālehu, Hawaiian Acres, Papa‘ikou, Kea‘au, Honomū, Pepe‘ekeo, Orchidlands Estates and Laupahoehoe.

A high surf warning remains in effect for east-facing shores until 6 a.m. Sunday.

Large and disorganized surf is expected to peak this evening at 14 to 18 feet then steadily decline late tonight. Expect very strong breaking waves and powerful currents.

Waves breaking in channel entrances may make navigating the channels dangerous.