Risk of rain, thunderstorms through Wednesday, with high humidity, on Long Island

The National Weather Service is forecasting occasional rain and scattered thunderstorms, for Long Island, overnight into Tuesday and through Wednesday, with the potential for disrupting travel in the region, authorities said. 

"A slow moving frontal system will produce areas of showers and thunderstorms through the middle of the week," said the weather service's Monday afternoon forecast.  "Another frontal system may approach for the weekend,"

The storms this week could bring hail of 1-inch in diameter and wind gusts up to 58 mph, the weather service said, but the area at greatest risk for such severe weather is in the Lower Hudson Valley and New Jersey.

The chances for storms, nevertheless, remain through Wednesday afternoon, the weather service said, with highs in the mid to high 70s and high humidity. Monday's humidity was 79% in many parts of Long Island.

Gov. Kathy Hochul urged New Yorkers to prepare for severe weather Monday and Tuesday, especially flash flooding on roads and flood-prone areas, and to "monitor their local forecast for the latest weather conditions." 

The Port Authority, which runs the region's airports, put out a news release Monday saying "Throughout Monday afternoon and evening and continuing through the next few days, the East Coast is expected to be at risk of severe weather, which may cause travel disruptions at the region’s airports. The Port Authority of New York and New Jersey is advising all travelers to plan ahead and check the status of their flight with their air carrier before heading to the airport."

As of 2 p.m. Monday, FlightAware reported John F. Kennedy International Airport had 344 delays; 181 cancellations, Newark Liberty International Airport had 350 delays; 302 cancellations and LaGuardia Airport had  314 delays; 274 cancellations

New York City Emergency Management also put out a release saying New Yorkers who live in flood prone areas should take precautions, warning that the heavy rains predicted for the Monday evening commute could be problematic for drivers.

Thursday and Friday are predicted to be sunny and around 80 degrees. Then the chance for more showers comes into the picture throughout the weekend with chances ranging from 30% to 50% with the highest risk Saturday night, the weather service said.