Update: 8 a.m.

The flood advisory for Hawaii island has been extended to 10:45 a.m. due to continued heavy rain, particularly over the eastern and southern areas of the island.

At 7:46 a.m., radar showed a band of heavy rain along the Kau Coast and South Hilo districts, according to the NWS. Rain was observed falling at a rate of 1 to 2 inches per hour.

Locations in the advisory include, but are not limited to, Hilo, Naalehu, Orchidlands Estates, Pepeekeo, Keaau, Ookala, Hawaiian Paradise Park, Kawa Flats, Pahoa, Hawaiian Acres, Glenwood and Hawaii Volcanoes National Park.

7 a.m.

Heavy rain falling over East Hawaii prompted a flood advisory for Hawaii island through 8 a.m. this morning.

Rain was observed falling at a rate of 1 to 2 inches per hour, according to the National Weather Service. More heavy showers were seen approaching the Kau and Puna coasts.

Locations in the advisory include, but are not limited to, Hilo, Orchidlands Estates, Hakalau, Keaau, Hawaiian Paradise Park, Kawa Flats, Pahoa, Glenwood and Hawaii Volcanoes National Park and Naalehu.

Wednesday, 6:30 p.m.

The National Weather Service has cancelled the flood advisory for Hawaii island.

4:10 p.m.

A flood advisory is in effect for Hawaii island until 6:45 p.m.

The National Weather Service reported heavy rainfall over the South Hilo, Puna and Kau districts, with rain falling at a rate of one to two inches per hour over Pahoa, Hilo and Papaikou.

More rainfall is expected to move over the island from the southeast over the next several hours, weather officials said.

Locations in the advisory include Hilo, Orchidland Estates, Pepeekeo, Keaau, Hawaiian Paradise Park, Kawa Flats, Pahoa, Hawaiian Acres, Glenwood, Hawaii Volcanoes National Park, Volcano and Pahala.

Previous coverage

An area of deep, tropical moisture is expected to move over the Hawaiian islands tonight, starting with the Big Island, according to National Weather Service forecasters, bringing heavy rain and a chance of thunderstorms.

The heavy rain and thunderstorms are expected to spread over the islands and last through Thursday night, but tradewinds are expected to build again on Friday, bringing a return to dry, stable conditions.

The Big Island may see more than 2 inches of rain tonight, which is expected to spread northwest Thursday, forecasters said.

Today should be mostly sunny, with isolated showers for some islands, and highs ranging from 85 to 90 degrees Fahrenheit, and winds from 10 to 15 mph. Tonight’s lows range from 72 to 77 degrees.

The heat index, a measure of what it feels like when temperature and relative humidity are combined, is lower than the past month. The heat index is expected to reach as high as 92 degrees in Honolulu, Kahului and Hilo, 91 in Kapolei, and 88 in Lihue this afternoon.

Despite slightly cooler temperatures, a high of 92 degrees on Tuesday matched the previous record set in 2004, according to the weather service.

Surf along north-facing shores is expected to be at 3 to 5 feet through Thursday, and 1 to 3 feet along west-, south- and east-facing shores through Thursday. An incoming north-northwest swell will boost surf during the second half of the week, but heights will remain below advisory levels.