Thunderstorm over Molokaʻi, Flood Warning until 12:45 p.m.; Maui and Lānaʻi Flood Advisory posted; Flood Watch until Sunday afternoon

Molokaʻi Flood Warning until 12:45 p.m.:

The National Weather Service has issued a Flood Warning for the island of Molokaʻi until 12:45 p.m. At 11:16 a.m., rainfall has diminished in intensity over southeast Molokaʻi, though radar indicated continued showers falling at a rate of up to 1 inch per hour. Gages at Kawela Gulch and Hālawa Stream are showing a slow decline in water levels, but flash flooding is likely continuing across portions of southeast Molokaʻi.

At 9:34 a.m., radar showed heavy rainfall with rates of 1 to 2 inches per hour over southeast Molokaʻi. Local law enforcement reported debris on the road near mile marker 7 on Kamehameha V Highway, and a gage on the Kawela Gulch is showing a rapid rise in water levels. Flash flooding is ongoing or expected to begin shortly. Some locations that will experience flash flooding include: Pūkoʻo, ʻUalapuʻe, Kamalo, Hālawa Valley, Kawela and Kalaupapa National Park.

At 6:49 a.m., radar showed moderate to heavy showers moving over Molokaʻi from the south, with rainfall rates of 1 to 2 inches per hour. Water levels in the Hālawa and Kawela streams remain elevated from earlier rainfall. Additional heavy rainfall and thunderstorms are expected today.

Maui Flood Advisory until 1 p.m.:

The National Weather Service has issued a Flood Advisory for the island of Maui until 1 p.m. At 9:46 a.m., radar showed heavy showers moving over West Maui, with rain falling at rates of 1 to 2 inches per hour. While the rainfall is currently concentrated over West Maui, additional heavy showers are expected to spread to southern and central Maui through midday. Some locations that will experience flooding include: Kahului, Kīhei, Lahaina, Māʻalaea, Puʻunēnē, Kēōkea, Wailea, Kula, Waikapū, Pukalani, Wailuku, ʻUlupalakua, Waiehu, Mākena, Waiheʻe, Olowalu, Kahakuloa, Kāʻanapali, Honokōhau and Nāpili-Honokōwai.

Lānaʻi Flood Advisory extended to 2 p.m.:

The National Weather Service has extended a Flood Advisory for the island of Lānaʻi until 2 p.m. At 10:33 a.m., while radar showed a brief decrease in rainfall, moderate to heavy showers are expected to redevelop over the island of Lānaʻi later this morning, with rainfall rates of 1 to 2 inches per hour expected.

At 7:36 a.m., radar showed moderate to heavy showers moving over the Island of Lanai from the south, with rainfall rates of 1 to 2 inches per hour.

At 4:54 a.m., radar showed moderate to heavy rainfall lifting north over island, with rainfall rates of 1 to 2 inches per hour.

Special Marine Warning until 12:30 p.m.:

The National Weather Service has issued a Special Marine Warning until 12:30 p.m. for: the ʻAlenuihāhā Channel, Māʻalaea Bay, Maui County Leeward Waters, Maui County Windward Waters, and the Pailolo Channel. At 10:52 a.m., strong thunderstorms were located along a line
extending from 6 nm northwest of FAD Buoy MC to 32 nm southeast of FAD Buoy P, moving northeast at 25 knots. Wind gusts of 40 knots has been recorded.

At 9:08 a.m., a line of strong thunderstorms was located along a line extending over Lānaʻi from near Shipwreck Beach to 21 nm south of FAD Buoy MC, moving northeast at 15 knots. Wind gusts of 40 knots has been recorded.

At 8:10 a.m., a broad line of thunderstorms extends across waters around Maui, Molokaʻi and Lānaʻi. Individual thunderstorms in this area were moving north to northeast at 20 knots. Small craft could be damaged in briefly higher winds and suddenly higher waves.

Flood Watch for all islands through Sunday afternoon

The National Weather Service has issued a Flood Watch for the entire state through Sunday afternoon. A kona low developing west of the islands will draw abundant moisture northward as it strengthens and eventually departs to north early next week. Several rounds of moderate to heavy rainfall are anticipated. The heaviest rain is expected to last through tonight, except for the Big Island where the heaviest rain is expected on Sunday. The public should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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Strong Thunderstorms over Molokaʻi until 8:15 a.m.

A strong thunderstorm will impact the island of Molokaʻi through 8:15 a.m. At 7:28 a.m., Doppler radar was tracking a strong thunderstorm over moving over the Kamalo area of southeast Molokaʻi moving northeast at 20 mph. Wind gusts were observed at up to 40 mph.

Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include: Kawela, Kalaupapa National Park, Pūkoʻo, Kamalo, ʻUalapuʻe, Hālawa Valley, Kaunakakai, and Kualapuʻu.