UPDATE: 9 p.m.

The National Weather Service has canceled this evening’s flood advisory for the island of Oahu.

6:30 p.m.

The National Weather Service in Honolulu has issued a flood advisory for Oahu until 9:15 p.m.

“At 6:18 p.m., radar indicated heavy rain over Honolulu. Rain was falling at a rate of 1.5 to 2.5 inches per hour,” the advisory said.

The advisory includes Honolulu, Kalihi, Moanalua, Salt Lake, Manoa, Palolo, Halawa, Iwilei, Sand Island, Kakaako, Ala Moana Beach Park, Fort Shafter, Makiki, Nuuanu, Makiki-Tantalus, Moiliili, Honolulu Airport, Waikiki, Kaimuki and Diamond Head.

4 p.m.

The National Weather Service has canceled a flood advisory for the island of Oahu.

1:15 p.m.

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

At 12:48 p.m., radar indicated heavy rain over central Oahu, the northern half of the Koolau Mountains, and the Waianae Mountains. Rain was falling at a rate of 1 to 2 inches per hour.

Locations in the advisory include, but are not limited to, Wahiawa, Schofield Barracks, Wheeler Field, Mililani, Waialua, Haleiwa, Kunia, Waikele, Waianae, Hauula, Pearl City, Laie, Punaluu, Nanakuli, Waikane, Kahuku, Waiahole, Helemano Housing and Whitmore Village.

The public should stay away from streams, drainage ditches and low-lying areas prone to flooding, officials said. Rainfall and runoff will also cause hazardous driving conditions due to ponding, reduced visibility and poor braking action.

Do not cross fast flowing or rising water in your vehicle, or on foot.

A flood advisory is issued when a specific weather event that is forecast to occur may become a nuisance, according to the NWS. It is issued when flooding is not expected to be bad enough to issue a warning, but may cause significant inconvenience, and if caution is not exercised, could lead to situations that may threaten life and/or property.

If flooding persists, the advisory may need to be extended beyond 4 p.m. today.

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Heavy showers and a few thunderstorms are expected over Kauai and Oahu today, forecasters said, especially through the afternoon hours. Isolated showers are expected for the eastern Hawaiian islands.

The National Weather Service also said wet and humid conditions are expected to linger through early next week due to “a plume of deep tropical moisture” approaching the isles.

Today’s forecast for Kauai and Oahu is mostly cloudy this afternoon, with showers and a slight chance of thunderstorms. The forecast for Maui and Hawaii island is partly cloudy with isolated showers.

Highs during the day range from 84 to 90 degrees, and lows tonight range from 69 to 74. Only light winds of up to 10 mph are expected through tonight.

The NWS continues to warn of nuisance flooding, with observed ocean water levels running up to 10 inches higher than predicted in some areas.

Impacts include flooding of beaches that are normally dry, minor coastal erosion and saltwater inundation of low-lying roads, docks boat ramps and other infrastructure.

Surf, on the other hand, is expected to remain below seasonal averages on all shorelines for the next few days, forecasters said, with little swell energy passing by.

Surf is expected to remain at flat to 2 feet for west shores today through Thursday, while surf for all remaining shores is expected to remain at 2 to 4 feet today through Thursday.

Forecasters warn that some periods of heavy showers over a particular area could translate to localized flooding concerns for Kauai and Oahu.

On Tuesday, a high of 88 degrees in Hilo matched the previous records for that day set in both 1992 and 2015. It was the seventh record high match for Hilo so far this month, in addition to two record highs that surpassed previous ones.