UPDATE: 9 p.m.

A flood watch remains in effect for all Hawaiian islands through Thursday afternoon.

The National Weather Service said flash flooding caused by excessive rainfall continues to be possible.

“A kona low to the west of the islands will keep a moist andunstable air mass over the islands through Thursday,” said a National Weather Service advisory. “This will result in the potential for flash flooding and thunderstorms.”

3:40 p.m.

A flood advisory is in effect for Molokai until 4 p.m. today.

Forecasters warn of minor flooding on roads and in streams along with poor drainage areas.

“At 2:49 p.m., radar indicated heavy to moderate rain over west Molokai or west of Kualapuu. Radar estimates that between 1 to 2 inches have already fallen over west Molokai. Rain is currently falling at an hourly rate of 1 to 2 inches,” the National Weather Service said. Some locations that will experience flooding include Maunaloa, Kepuhi and Kualapuu.

The weather service also issued a “special weather statement” after 3:30 p.m., saying that heavy showers were expected to hit northeast Maui through 4:30 p.m.

Forecasters said that at 3:33 p.m., radar showed near stationary showers about 36 miles east of Kahului producing isolated amounts of 1 to 2 inch.

Locations that may be effected include Kipahulu, Hana Forest Reserve, Nahiku, Keanae, Haleakala National Park, Wailua, and Hamoa.

A winter weather advisory for Hawaii island summits is also in effect until 6 a.m. Thursday with snow accumulations up to 5 inches and southwest winds gusting up to 50 mph, forecasters said.

1 p.m.

The flood advisory for Oahu expired at 12:30 p.m.

A flood watch remains in place for all main Hawaiian isles through Thursday afternoon due to periods of heavy rainfall as a “Kona low” storm approaches from the west.

The state Health Department, meanwhile, has issued a brown water advisory for all coastal waters around the island of Kauai.

Heavy rain has resulted in storm water runoff entering coastal waters, the department warned, due to the possible overflowing of cesspools, sewer and manholes along with potential pesticides, animal fecal matter, dead animals, pathogens, chemicals, and associated flood debris.

The public is advised to stay out of the water when it is brown.

Brown water advisories are also in place for all coastal waters around the islands of Oahu and Maui.

Noon

The National Weather Service has issued a special weather statement for the islands of Maui, Molokai and Kahoolawe through 1:15 p.m.

Radar at 11:43 a.m. showed pockets of moderate rain 12 miles southwest of Makena, or 24 miles south of Kahului, moving north at 30 mph, the NWS said. Additionally, wind gusts up to 40 mph were seen.

“Periods of rain exceeding one inch per hour could exacerbate localized flooding over recent burn scars in west Maui and on the western slope of Haleakala,” weather officials said in a bulletin. “Gusty winds could blow around unsecured objects.”

Affected locations include Kahului, Kihei, Lahaina, Honokohau, Haliimaile, Kipahulu, Wailuku, Makawao, Paia, Keokea, Wailea, Waihee, Kula, Pukalani, Kapalua, Puunene, Waikapu, Waiehu, Hana, and Makena.

10:10 a.m.

The flood advisory for the island of Kauai has expired.

10:05 a.m.

The Hawaii State Capitol basement is a sopping mess from flooding amid the flood advisory. Workers were seen inside the basement mopping up floors, while trash bins and buckets collected leaking water from the ceilings.

The Capitol has had ongoing issues with leaks from the reflecting pools around the building.

9:40 a.m.

A flood advisory has been posted for Oahu through 12:30 p.m. today.

Radar at 9:29 a.m. showed heavy rain over Oahu falling at a rate of up to 1 to 1.5 inches per hour, the NWS said.

Some locations that will experience flooding include Honolulu, Waipio, Mililani, Pearl City, Waikele, Wahiawa, Wheeler Field, Aiea, Waipahu, Kunia, Halawa, Waiahole, Waikane, Schofield Barracks, Salt Lake, Kahaluu, Moanalua, Ahuimanu, Iroquois Point and Ewa Beach.

Residents and visitors are advised to stay away from streams, drainage ditches and low-lying areas prone to flooding.

8 a.m.

The flood advisory for the island of Kauai has been extended through 10 a.m. today.

Radar at 7:56 a.m. showed heavy rain over Kauai falling at a rate of up to 1 to 3 inches per hour, the NWS said.

Some locations that will experience flooding include Lihue, Kapaa, Kalaheo, Kekaha, Princeville, Kilauea, North Fork Wailua Trails, Alakai Swamp Trails, Lawai, Omao, Kokee State Park, Wailua Homesteads, Hanalei, Hanapepe, Wainiha, Na Pali State Park, Koloa, Haena, Waimea and Wailua.

PREVIOUS COVERAGE

A flood advisory has been posted for Kauai as an expanded flash flood watch goes into effect for the rest of the state this morning.

Radar at 4:39 a.m. showed areas of heavy rain across the island of Kauai, mostly over the southern half of the island, but spreading northward, according to the National Weather Service. Rain was measured at a rate of up to 1 to 3 inches per hour.

The flood advisory is in effect through 8 a.m. but may need to be extended if flooding persists.

Meanwhile, a flash flood watch is in effect for all main Hawaiian islands through Thursday afternoon.

“Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams,” the NWS said in a bulletin this morning. “Urban areas may receive more significant flooding and property damage due to rapid runoff.”

Residents and visitors should be prepared to take action should flash flood warning be issued.