Mount Holly, NJ – New Jersey residents will endure another day of dangerous heat and humidity on Independence Day before a round of showers and thunderstorms brings cooler temperatures beginning Sunday.
The National Weather Service forecasts mostly sunny skies Saturday with a high near 99 degrees. Combined with high humidity, heat index values are expected to reach 104 degrees, creating dangerous conditions for anyone spending extended time outdoors during Fourth of July celebrations.
Storms expected Saturday night
Forecasters say there is a 30% chance of showers and thunderstorms developing after 5 p.m., with some storms capable of producing heavy rainfall.
Rain and thunderstorms are expected to become more widespread Saturday night, with a 60% chance of precipitation before 3 a.m. Some storms may produce heavy downpours, with rainfall totals between a quarter-inch and one-half inch possible.
Overnight temperatures will remain warm, falling only to around 73 degrees, before noticeably cooler air arrives on Sunday.
Cooler, wetter pattern ahead
Sunday’s high temperature is expected to reach 85 degrees, nearly 15 degrees cooler than Saturday, although scattered afternoon and evening thunderstorms remain possible.
The unsettled weather pattern is expected to continue into next week, with repeated chances for showers and thunderstorms from Sunday night through Tuesday.
Forecast highs are expected to remain in the low to mid-80s through Wednesday:
- Saturday: Mostly sunny and hot, high near 99, heat index up to 104. Afternoon and evening thunderstorms possible.
- Saturday Night: Showers and thunderstorms likely, some with heavy rain. Low around 73.
- Sunday: Partly sunny with a high near 85. Chance of afternoon thunderstorms.
- Sunday Night: Showers and thunderstorms likely. Low around 68.
- Monday: Showers and thunderstorms likely. High near 81.
- Tuesday: Continued chances for showers and thunderstorms. High near 83.
- Wednesday: A slight chance of morning showers, then partly sunny with a high near 84.
Officials urge residents celebrating outdoors to stay hydrated, limit strenuous activity during the hottest part of the day, wear lightweight clothing, and seek air-conditioned spaces whenever possible. Anyone attending fireworks displays or outdoor gatherings Saturday evening should also monitor the forecast for developing thunderstorms.
Key Points
- Heat index values could reach 104 degrees across parts of New Jersey on the Fourth of July.
- Thunderstorms with heavy rain are expected to develop Saturday evening and continue overnight.
- Cooler temperatures in the 80s arrive Sunday, but an unsettled weather pattern with daily storm chances is expected through at least Wednesday.
