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Flash flood watch to continue for western isles as rains spread across Hawaii

9:15 p.m.

Tonight’s flood advisory for Oahu has expired. A flash flood watch for Oahu and Kauai County remains in effect through Thursday afternoon.

8 p.m.

A flood advisory has issued through 11:15 tonight for Oahu.

The National Weather Service said radar indicated heavy rain over portions of southern Oahu, with the heaviest rain affecting Barbers Point and Campbell Industrial Park. Another area of heavy showers is affecting the Halawa and Pearl Harbor area.

These slow-moving showers will produce rainfall rates between 1 and 2 inches per hour.

Locations in the advisory include but are not limited to Honolulu, Salt Lake, Fort Shafter, Moanalua, Halawa, Kalihi, Aiea, Pearl City, Waipahu, Ewa Beach, and Ko Olina.

A flood advisory issued for the Big Island earlier this afternoon has expired.

4 p.m.

A flood advisory has been issued through 6:45 p.m. today for the Big Island.

Radar this afternoon indicated heavy showers over the western end of the island with the heaviest rainfall occurring around Kailua-Kona and north to Puuanahulu. The National Weather Service reported rain was falling at a rate of 1 to 2 inches per hour.

Locations in the advisory include but are not limited to Kailua-Kona, Captain Cook, Waikoloa Village, Holualoa, Honalo, Kainaliu, Kahaluu-Keauhou, Kealakekua, Kalaoa, Puuanahulu, Honaunau, Pohakuloa Training Area, Puako, Kawaihae, Kamuela, Kohala Ranch, Hawaiian Ocean View, Kona International Airport, Waikoloa Beach and Waikii.

A winter weather advisory is also in effect until 6 a.m. Wednesday for Big Island summits.

A flood advisory this afternoon for Maui has expired. A flash flood watch for Oahu and Kauai County remains in effect through Thursday afternoon.

2:30 p.m.

The National Weather Service has issued a flood advisory for the island of Maui, effective through 4:45 p.m. today.

At 1:42 p.m., radar indicated heavy showers and thunderstorms flaring over eastern and central Maui, with the most persistent showers occurring near Hana. Rain was falling at a rate of 1 to 2 inches per hour.

Locations in the advisory include but are not limited to Kahului, Kihei, Kula, Keokea, Pukalani, Makawao, Haliimaile, Keanae, Haiku-Pauwela, Huelo, Ulupalakua, Wailea, Kaupo, Kipahulu, Paia, Pauwela, Nahiku, Makena, Puunene and Maalaea.

EARLIER TODAY

Wet weather is expected to continue across Hawaii this week, forecasters said, as a slow-moving front northwest of Kauai continues to move through the isles.

The National Weather Service has also issued a flash flood watch for Oahu and Kauai County, which remains in effect through Thursday afternoon, but may need to be expanded to other isles later.

Tropical moisture and layered clouds are expected to move north over local skies, bringing the threat of thunderstorms and heavy rainfall during the second half of the week.

As rain fell over the western side of the state on Monday, a light dusting of snow atop Mauna Kea was captured by the webcams at Mauna Kea Weather Center.

Today’s forecast includes showers, which can be heavy at times, and a slight chance of thunderstorms for most isles, particularly for Oahu and Maui County.

Highs today range from 80 to 85 degrees Fahrenheit, and lows tonight from 69 to 74. Variable winds range up to 15 mph, but no higher, through the rest of the week.

Surf will remain below advisory levels on all sides as a current, northwest swell continues to diminish through Wednesday.

Surf on north shores at 5 to 7 feet this morning is expected to lower to 3 to 5 feet Wednesday. Surf on west shores at 3 to 5 feet today is expected to lower to 1 to 3 feet on Wednesday.

Surf on south and east shores will remain at 1 to 3 feet, and 3 to 5 feet, respectively, through Wednesday evening.

Weather officials say bands of clouds and showers wrapping around an upper low lingering north of the islands the second half of the week will “keep variable winds and weather in the forecast, and trade winds absent.”

There could be periods of heavy showers and thunderstorms coming in the next few days, but forecasters say there is significant uncertainty where and when they will occur, so the public should “be prepared for changes to the forecast over the coming days.”

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