Arctic high pressure building from the northwest brings Long Island its coldest air of the winter late Monday into Tuesday, the National Weather Service said.
Daily high temperatures for the two days will range from the mid-20s to the low 30s, the service’s Upton office said. Overnight lows during that span should dip into the teens.
The wind chill will make it feel even worse, News 12 Long Island meteorologist Rich Hoffman said.WeatherLatest forecastTravelLive: Traffic map
Hoffman said Long Islanders should brace for the coldest air since March of last year.
But after the two-day flash freeze, mild temperatures will return.
“Wednesday, Thursday and Friday we have highs back in the low 40s,” said Carlie Buccola, a meteorologist at Upton. “Then the weekend looks like it will be even warmer, with daily highs in the upper 40s and closer to 50.”
On Monday, winds from the north northwest are blowing from 10 to 20 mph, with gusts up to 30 mph, forecasters said.
Hoffman said Tuesday morning will be “clear and bitterly cold” with winds again from the north between 10 to 15 mph.
Wind chills will make it feel more like zero to 10 degrees, he said.
Freezing temperatures have been recorded at Long Island MacArthur Airport this fall and winter, but “after record warmth for November and December this will be by far the coldest air mass of the season,” the service said.
Before Monday, the coldest temperature this fall or winter at the Ronkonkoma airport was 29 degrees on Oct. 19, Buccola said.
But with the forecast calling for overnight lows of 14 degrees on Monday and 18 on Tuesday, this stretch should be the coldest since the airport recorded 9 degrees on March 3, 2015, Buccola said.