Most islands under flash flood watch through Thursday afternoon

Update 4 p.m.

The National Weather Service lifted a flood advisory for the island of Maui.

A flash flood watch remains in effect for the Big Island, Maui County and Oahu through Thursday afternoon.

Update 11:50 a.m.

The National Weather Service posted a flood advisory for the island of Maui.

The advisory runs through 2:45 p.m. and includes, but is not limited to, Kahului, Kihei, Lahaina, Kaanapali, Waikapu, Honokohau, Pauwela, Wailea, Huelo, Paia, Makawao and Puunene.

Radar at 11:47 a.m. showed heavy rainfall over the island of Maui at a rate of 1 to 2 inches per hour, according to weather officials.

Update 11:40 a.m.

The state health department issued a brown water advisory for Oahu due to the recent heavy rains.

The agency advised the public to avoid flood waters and storm water runoff due to possible contamination from overflowing cesspools, sewer manholes, pesticides, animal fecal matter, dead animals, pathogens, chemicals and associated flood debris.

Update 11:10 a.m.

Weather officials issued a flood advisory for Lanai through 2 p.m. today.

Radar at 11:02 a.m. showed heavy rain near Lanai City falling at a rate of 2 inches per hour.

Earlier coverage

Although an earlier flood advisory was canceled for Hawaii island early this morning, more rain is in the forecast for that and all other islands today, except for Kauai.

Additionally, a flood advisory is in effect for Molokai through 1:15 p.m. today. Weather officials said that at 10:12 a.m., radar showed heavy rain near Kalaupapa falling at a rate of 2 inches per hour.

A flash flood watch remains in effect for the Big Island, Maui County and Oahu through Thursday afternoon.

Officials at the National Weather Service said that “a very moist and unstable air mass interacting with an upper level trough will result in unsettled weather with the potential for flash flooding.”

Besides abundant rain, the tropical moisture blanketing the state will make for hot, muggy conditions today. In Honolulu, the dew point will hover around the mid-70s for most of the day, peaking at 77 degrees at 1 p.m., forecasters said.