Long Island Weather: Heat Index To Approach 100 Degrees, Thunderstorms Possible Tuesday

It's shaping up to be a hot and stormy Tuesday on Long Island, but some fall-like weather is following close behind. Temperatures will likely hit 90 degrees on parts of the island Tuesday with the heat index (how hot it feels with humidity factored in) approaching 100 degrees.

In New York City, a heat advisory will be in effect from noon until 6 p.m. Things cool off from west to east. The high in East Hampton Tuesday will be about 82 degrees.

There's a chance of showers and thunderstorms Tuesday night into Wednesday morning.

"While there is a severe weather risk to the west of Long Island this looks to be another case where the thunderstorms are likely to weaken or fall apart before they get here so I don’t think we have a severe weather issue to be concerned with," Joe Cioffi, a meteorologist for WPIX-TV and FiOS1 News, wrote on his website.

Slightly cooler weather arrives Wednesday and then Canadian high pressure will build into the region Thursday through early next week, providing dry and sunny conditions. Temperatures will be below normal as highs only reach the 70s to near 80 each day, the NWS says.

If you are headed to the beach Tuesday, beware that rip currents are expected to be very active, especially in the afternoon, when there is a high rip current risk.

Here's the full forecast:

Tuesday- Mostly sunny, with a high near 87. Heat index values as high as 95. Southwest wind 8 to 15 mph.

Tuesday Night- Scattered showers and thunderstorms. Increasing clouds, with a low around 71. South wind 16 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.

Wednesday- Scattered showers and thunderstorms, mainly before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. Southwest wind 7 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 30%.

Wednesday Night- Partly cloudy, with a low around 61. North wind around 7 mph.

Thursday- Sunny, with a high near 79. North wind around 7 mph becoming west in the afternoon.

Thursday Night- Partly cloudy, with a low around 63.

Friday- Sunny, with a high near 77.

Friday Night- Mostly clear, with a low around 61.

Saturday- Sunny, with a high near 76.

Saturday Night- Mostly clear, with a low around 62.

Sunday- Sunny, with a high near 77.

Sunday Night- Partly cloudy, with a low around 63.