Steamy weather, with periodic rain, storms, for the weekend

Long Island’s weekend forecast calls for more humid weather, with periodic showers and possible thunderstorms.

The showers and thunderstorms are expected to start late in the day Saturday, as the rain moves across Nassau County and heads east toward Suffolk County, said John Cristantello,  a meteorologist at the weather service's office in Upton.

“As it’s migrating to eastern Long Island during the evening hours, you’ll see those higher chances of rain,” Cristantello said Friday afternoon.

Despite the slowly moving showers and thunderstorms, most of the day Saturday should be dry, Cristantello added.

The weather service forecast lists a 50% chance of showers and thunderstorms Saturday with a high temperature near 83 degrees. The wind is expected to blow out of the south at 9 to 13 mph.

The chance of rain rises to 60% Saturday evening with a thunderstorm possible before 2 a.m. Sunday.

As of late Friday afternoon the weather service was saying Long Island was not included in a heat advisory for Saturday for a north-south corridor just west of New York City that was predicting maximum apparent temperatures in the mid to high 90s in the lower Hudson Valley and 102 and 103 degrees in the New Jersey towns of New Brunswick and Freehold. 

On Long Island on Saturday, maximum apparent temperatures, or what the temperatures feel like to the human body when relative humidity is combined with the actual air temperatures, are expected to reach 92 degrees in Syosset and 91 degrees in Stony Brook but just 78 degrees near in Islip on the South Shore.    

The weather service also said there will be a high rip current risk on Long Island's South Shore beaches through early Saturday evening. The service advised beachgoers to stay out of the surf, adding that rip currents can sweep even the best swimmers away from the shore.

Sunday has a 30% chance of showers and thunderstorms, mainly before 8 a.m. The rest of the day is expected to be mostly cloudy, with a high actual air temperature of about 89 degrees.

The start of the new workweek Monday will bring partly sunny skies and a high temperature of around 87 degrees, according to the weather service.