NYC Weather: 105-Degree Heat Index Will Scorch City

NEW YORK CITY — A triple-digit scorcher is coming to New York City.

The heat index could reach the lower 100s Monday and as high as 105 degrees Tuesday, according to the National Weather Service.

Hot and humid conditions likely will continue through the early week because of an offshore high pressure system known as a Bermuda high, meteorologists say.

"Nighttime conditions will offer little relief, with high humidity and lows in the middle to upper 70s for much of the metropolitan areas, to around 80 in the NYC and NE NJ metro," a National Weather Service story states.

And the muggy conditions could get worse before they get better.

Showers and thunderstorms predicted late Monday and into Tuesday will only bring more moisture to the Northeast, according to an AccuWeather report.

Potential downpours followed by sunny weather will create steamy weather, the AccuWeather report states.

But cooler air is likely to arrive Wednesday, although storms could linger. AccuWeather predicts highs in the low- to mid-80s.

"After some very warm days early this week, big changes in the weather pattern will allow cooler air to push southward into the Northeast as the week progresses," said Alex DaSilva, a long-range meteorologist with AccuWeather, in a report from the service.

"For many people in the Northeast, the cooldown will feel extreme since the past few weeks have been so warm and since humidity levels have been so high of late."

Here's the complete National Weather Service forecast.

Monday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 87. Southwest wind 9 to 14 mph.

Monday Night
A 20 percent chance of showers and thunderstorms before 3am. Partly cloudy, with a low around 81. Southwest wind 11 to 13 mph.

Tuesday
A 40 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. Heat index values as high as 97. Southwest wind around 11 mph.

Tuesday Night
A 50 percent chance of showers and thunderstorms before 3am. Mostly cloudy, with a low around 77. West wind 6 to 9 mph.

Wednesday
A chance of showers and thunderstorms between 9am and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 81. North wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night
Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and 3am, then a chance of showers after 3am. Mostly cloudy, with a steady temperature around 79. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Thursday
A 50 percent chance of showers before 3pm. Partly sunny, with a high near 80.

Thursday Night
Partly cloudy, with a low around 72.

Friday
Mostly sunny, with a high near 78.

Friday Night
Mostly clear, with a low around 68.

Saturday
Sunny, with a high near 77.

Saturday Night
Mostly clear, with a low around 67.

Sunday
Sunny, with a high near 77.