The weather system that soaked Oahu on Wednesday and peppered the island with a little hail shifted eastward by late afternoon over Maui County and on to Hawaii island today.

A strong upper low-pressure system, combined with a cold front and plenty of moisture, was fueling the potential for flash floods, National Weather Service lead forecaster Alex Gibbs said Wednesday evening.

Oahu took the brunt of the heavy rain with upward of 2 to 3-1/2 inches of rainfall islandwide during the 24-hour period prior to 5 p.m. Wednesday. Upper Nuuanu got 3.38 inches of rainfall.

Although stream levels rose, there was no flash flooding.

City officials shut down the Honolulu Zoo and the West Loch Golf Course on Wednesday due to the rain.

Zheray Wong, 32, of Kunia was having breakfast in her kitchen at about 8 a.m. Wednesday when she heard what sounded like pebbles hitting the jalousies.

She walked outside and noticed the temperature was colder than usual, saw the small bits of ice and used her cellphone to capture the event.

Wong, who said it was her first time witnessing hail, picked up the ice and held it in her hand. Her 4-year-old son was thrilled and asked if it was going to “fill up,” meaning pile up like snow.

Oahu and Kauai, which did not receive as much rainfall, should dry out over the next couple of days, but the wet weather could shift back toward Oahu late Saturday and into Sunday.

There is a potential for the system to stall over the Big Island, with the chance for heavy rain over the eastern end of the state through the workweek and possibly into the weekend, Gibbs said.

The National Weather Service issued a flash-flood watch for Maui County and Hawaii island until Thursday afternoon.

The weather service also issued a wind advisory for Mauna Kea and Mauna Loa above 12,000 feet through 6 p.m. today. Southwest winds up to 50 mph, with gusts over 60 mph, are expected.

The public is advised to postpone travel to the Big Island summits until conditions improve.