Forecasters predict humid conditions and the possibility of rain today as the tropical airmass association with what was Hurricane Celia continues to move west over the state.

Cooler tradewinds are expected to follow this evening and Wednesday, bringing brief windward showers through Friday.

Oahu and Hawaii island spent much of today under flood advisory due to heavy rains.

The Oahu advisory covered Aiea, Kunia, Schofield Barracks, Pearl City, Waikele, Waipahu, Mililani and Halawa.

At 3:41 p.m., radar showed an area of moderate rain of up to an inch an hour between Mililani and Wahiawa moving southeast at 5 mph.

On Hawaii island, rain fell at a rate of 1 and 3 inches per hours between Ookala and Laupahohoe.

Other affected areas included Honomu, Ninole, Pauuilo and Hakalau.

Both advisories expired this evening.

Humidity associated with Hurricane Darby is expected to begin moving over the islands Thursday or Friday and a much weaker Darby could bring heavy rains and strong winds this weekend if it continues on its current track.

If Darby, likely a tropical depression by the weekend, passes north of the islands, it will likely have the same effect on Hawaii’s weather as Celia and the weather this weekend could be similar to today’s humidity and rains.

If it passes south or over the islands, there could be strong winds and heavier rains because the heaviest rains associated with the storm are generally on the northeast or northwest section of the system and the strongest winds are near the center of the storm.

The actual path of a storm can vary by more than 170 miles on forecasts five days out, so Darby’s effect on Hawaii’s weather is still uncertain.

Meanwhile, a high surf advisory is in effect for north shores of Oahuand Kauai because of a choppy swell generated by Celia’s passage north of the islands. The advisory is in effect until 6 a.m. today. Wave heights were expected at 6 to 10 feet overnight.