So, how cold did it get in New Jersey this morning amid the latest blast of arctic air? One town in Sussex County recorded a bone-chilling morning low temperature of 17 degrees below zero. At least 20 other towns across nine counties also had sub-zero temperatures — not factoring in the wind chill.

This new type of weather warning was activated because of the dangerously cold temperatures and wind-chill readings in northeastern Pennsylvania.

The NWS extends a Cold Weather Advisory for the region including parts of Delaware, Maryland, New Jersey, and southeast Pennsylvania.

“The safety of our plungers is always No. 1 on our minds,” said Jeremy Davis, who helps run the annual Polar Bear Plunge at Seaside Heights for Special Olympics New Jersey. “If it dips below freezing and becomes too dangerous, we would certainly have to make alternate plans.”

An unusual weather phenomenon known as thundersnow was reported near Essex County Sunday evening, according to the National Weather Service. The rare weather event was reported around 6:17 p.m.

The quick moving snowstorm brought frigid temperatures to New Jersey, with wind making it feel like single digits. The cold is expected to last all week.

A record-breaking snowstorm in the southern U.S. dumped as much as 8 inches of snow on New Orleans and nearly a foot of snow in Alabama

The National Weather Service has issued a hazardous weather outlook for New York and New Jersey on Thursday. Forecasters say there is a chance of afternoon snow showers which could lead to some slippery spots during the evening commute.

By the time March, April, and May come along, even the most ardent snow-lovers can suffer from winter weather fatigue. After all the shoveling and plowing and salting and slipping and sliding and bundling up, the flip from winter to spring is usually a welcome one.

Snow will start falling between 11 a.m. and 1 p.m. in North Jersey and could begin as a brief wintery mix before turning to snow by early afternoon.

With a winter storm moving in, New Jersey is under a State of Emergency Sunday morning. The State of Emergency, declared by Gov. Phil Murphy, went into effect at 8 a.m. Sunday. The state is expecting heavy snow totaling up to 8 inches followed by extremely low temperatures.

Snowfall is expected to be light and concentrated along the Jersey Shore region. Ocean and Monmouth counties might see up to 1 inch of snow accumulation. Further south, the Cape May County area is expected to receive the most snow, with accumulations possibly topping out around 2 inches.