100-Degree Temps, Heat Advisory Issued For Nearly All NJ Monday

NEW JERSEY - A wave of “excessive heat” continues this week in New Jersey, with temperatures up to 104 degrees are expected Monday, forecasters said.

18 counties are currently under a heat advisory through 8 p.m. Tuesday as heat index ("feels-like") values can soar up to 104 degrees, the National Weather Service said. The affected counties are:

• Sussex
• Warren
• Morris
• Hunterdon
• Somerset
• Middlesex
• Monmouth
• Mercer
• Salem
• Gloucester
• Camden
• Burlington
• Ocean
• Passaic
• Hudson
• Beren
• Essex
• Union

“Peak heat index values are forecast to reach 100 to 104 [Monday] afternoon and again on Tuesday afternoon,” the National Weather Service said. “Low temperatures should favor the 70s, providing little relief from the heat at night.”

Chances of showers and thunderstorms are limited, and any severe weather that develops is expected to dissipate this evening with the loss of daytime heating, the National Weather Service added. Rainfall amounts “remain in the 2-inch neighborhood” as part of localized downpours possible with any thunderstorms.

The excessive heat should continue through Wednesday, which is also expected to see probable showers and thunderstorms in the afternoon, according to AccuWeather.

“A break from the excessive heat and high humidity arrives with a strong cold front later Thursday, then cooler and much less humid air settles in for Friday through Sunday,” the National Weather Service reported in a Monday forecast discussion.

Here's the latest forecast, per the National Weather Service:

Monday: Sunny, with a high near 94. Heat index values as high as 101. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

Monday Night: Mostly clear, with a low around 76. Southwest wind around 5 mph.

Tuesday: Sunny, with a high near 95. Heat index values as high as 102. Southwest wind 5 to 10 mph.

Tuesday Night: A chance of showers and thunderstorms, mainly between 8 p.m. and 2 a.m. Partly cloudy, with a low around 74. Southwest wind around 5 mph becoming calm. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday: Showers and thunderstorms likely after 2 p.m. Partly sunny, with a high near 90. Calm wind becoming west around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: Showers and thunderstorms likely, mainly before 2am. Mostly cloudy, with a low around 70.