Forecasters are expecting a damp weekend, with the potential for heavy showers, as remnants of Tropical Storm Ulika move over the state starting as early as Saturday night and continuing through Tuesday.

A developing weather system is expected to create unstable atmospheric conditions starting tonight as clouds ahead of Ulika begin to move over the state, National Weather Service forecasters said. Windward and mauka areas can expect showers. Some of the rain will spread to leeward areas.

The center of what’s left of Ulika is expected to bring more moisture and cut off the tradewinds by Monday, forecasters said.

As Ulika passes south or over the islands Saturday night through Tuesday, wind will shift to the east or southeast, increasing humidity and the chance of afternoon showers in leeward areas, forecasters said.

Ulika crossed into the Central Pacific on Thursday morning. While it remained a tropical storm Thursday night, wind shear is tearing it apart and it is expected to become a remnant low by today, forecasters said.

Late Thursday afternoon, the storm had sustained wind of 40 mph and was about 930 miles east-southeast of Hilo. It was moving northwest at 8 mph. As it weakens, tradewinds should blow the storm’s remnants west.

Today should be mostly sunny and breezy with scattered windward showers and isolated leeward showers, forecasters said.

Skies are forecast to become more cloudy tonight and mostly cloudy on Saturday with showers likely in windward areas. Leeward skies will be partly sunny during the day and mostly cloudy at night with scattered showers through Tuesday.

There is a 50 percent chance of rain through Tuesday in Honolulu and south shores of Oahu.