Long Island weather: Chance of showers Sunday, sunny Labor Day

There's a chance of rain Sunday but the Labor Day skies are expected to be sunny — eventually — after a mostly cloudy morning, according to the National Weather Service.

The odds that any storms, expected to push east from Kansas and merge with a rain-delivering low pressure system in central Canada, could occur on Long Island are 20% — except on Sunday night, when the chances rise to 30%, the weather service and its Weather Prediction Center said.

Highs should be in the mid-70s Sunday, the weather service said.

And Hurricane Larry, which is expected to sweep over Caribbean islands from the Greater Antilles to the Bahamas and Bermuda on Monday and Tuesday, should stay off the East Coast but could cause rip currents starting midweek.

"Large swells are also likely to spread to the East Coast of the United States by midweek," the National Hurricane Center said.

Clouds arrive

Sunday's clouds are from an upper-level air disturbance over the Great Lakes, the weather service said.

Through Friday, daytime temperatures on Long Island should be around the mid-70s and retreat to the 60s at night. Mostly clear skies are expected after the holiday weekend, aside from Wednesday, when there is a chance of showers and thunderstorms.

The high pressure system that will give Tuesday its sunny skies will be replaced by a frontal system and then a cold front, a combination that might bring "a possible severe weather threat Wednesday afternoon/evening," the weather service said.

There is a 40% chance of showers and possible thunderstorms, mainly after 2 p.m., on Wednesday.

"The threat should wane Wednesday night, with [the] cold front passing through by Thursday a.m.," it said.

At least both Thursday and Friday should be mostly sunny into Saturday.