Deep freeze starts Friday: Here’s the timeline for the Arctic cold and monster storm this weekend

Already in the depths of winter, New Englanders will experience temperatures as much as 30 degrees below normal during this harsh cold spell. Take a look at how our temperatures remain stuck in this deep freeze through Monday morning.

Forecast frigid temperatures from Friday through Monday morning as Arctic air settles into the region.Boston Globe

If you have plans out on the town Friday and Saturday nights, make sure you bundle up. Frostbite will be a concern if you’re outside with exposed skin for more than 30 minutes. When wind is factored in, it can get dangerously cold. Also, keep in mind that your dog’s paws could also get frostbite if you’re out for too long. We also have to look out for our furry companions.

Extremely cold air will drop temperatures to as much as 30 degrees below the seasonal average through the weekend and into next week. The deep purple colors reveal just how below normal the air will turn across the region. Pivotal Weather

Here’s a timeline of when the intense cold and snow settle in:

Friday: Icy cold air arrives in New England

Morning: The day will start in the low to mid-20s before quickly rising. Temperatures will actually be the warmest during the morning hours, with Greater Boston likely to reach the low 30s by noon, while areas west of I-495 don’t quite get to the 30-degree mark.

The cold will start to creep into Northern New England with morning temperatures in the mid- to upper teens. All of New England should see a blend of sun and clouds.

Highs will be near 30 degrees in Boston on Friday morning, before dropping throughout the afternoon.Boston Globe

Afternoon: We’ll continue to see a mix of sun and clouds region-wide with a few scattered, light snow showers pushing into Northern New England. These snow showers should have little accumulation, maybe up to an inch or two. Temperatures will briefly reach the 20s up north, but then begin to fall rather quickly to the low and mid-teens during the afternoon hours.

For Boston and the rest of Southern New England, temperatures will begin to fall steadily into the teens across the Berkshires and into the 20s from Springfield to Boston. There will be a slight breeze developing from the west, reaching 10 to 15 mph, that will drop wind chills another 5 degrees or so into the teens to low 20s.

Evening: The frigid air really begins to settle in with a steady breeze that will make the cold have some extra bite to it. So if you have plans at night, make sure to bundle up because you’ll absolutely feel the cold.

Boston to Worcester should hold on to the teens by around 10 p.m., but even the South Coast and the Cape will fall into the low 20s by this point. Temperatures dive into the single digits across Northern New England and the Berkshires. Add in the wind chills, and we’re going to be staring at negative wind chills across the entire region during the night.

Wind chills will make it feel like it’s in the negatives on Friday night across most of New England.Boston Globe

The National Weather Service has issued an Extreme Cold Watch for Western Massachusetts, Vermont, and parts of New Hampshire and Maine, with dangerous wind chills set to plummet as low as 40 below zero Friday night into Saturday up north.

Cold weather alerts are in place for much of Northern New England and Western Mass. Friday night into early Saturday.Boston Globe

Saturday: Bone-chilling cold gets even more frigid

Morning: Waking up Saturday morning and stepping outside will bring a shock to the system. Sure, we’ll see mostly sunny skies, but temperatures across Boston and really all of Southern New England will be in the single digits around sunrise. For folks up north, you’re looking at widespread negative readings.

With a slight breeze in place, feel free to knock off another 5 degrees from whatever temperature readings you’re seeing. The wind chill in Boston may be as low as 5 below to 10 below.

Afternoon: With the cold air locked in, highs on Saturday will be miserable. Boston will only reach the mid-teens, while areas west and north will either hover around 10 or remain in the single digits.

Evening: Once again, for those who have plans on Saturday night, you’ll want to prepare for the dangerous cold. We’ll see air temperatures sink to the single digits and low teens across the Bay State, warmest near Boston to the Cape, and then into the single digits the farther west you go. Add in a steady breeze of about 10 mph, and you’re facing wind chills back into the negatives across most of the region.

For folks up north, the brutal cold and wind chill will remain in place, with many apparent temperatures 10 degrees below up north.

Highs on Saturday will only reach the mid-teens across Boston, and much colder in the north.Boston GlobeWind chills will drop once again into the negatives across most of New England Saturday night.Boston Globe

Sunday: Remaining cold as a major snowstorm approaches

• 7 a.m. to 1 p.m. — Sunday will be eventful. Skies will turn mostly cloudy to overcast during the morning with ice-cold temperatures in the single digits across Boston and most of Southern New England. Folks up north will be in the negatives during the morning. Only Maine will see any sunshine during this stretch. The only sliver of good news here is that the winds will relax a bit, taking away the wind chill.

But then here comes the snow, the outer edges of a monster storm will push into Southern New England from the southwest during this window, likely reaching Western/Central Massachusetts and eventually Boston by the late morning or early afternoon.

• 1 p.m. to 7 p.m. — Heavy snow arrives across Southern New England while temperatures rise to the low 20s across Greater Boston to Providence, but remaining in the teens the farther west you go. Conditions will deteriorate further as we progress.

Forecast highs across the region on Sunday.Boston Globe

• 7 p.m. into the overnight — The snow continues to fall, with heavy bands at times, across Southern New England. Even most of Northern New England will be engulfed in steady snowfall during this stretch, but the snow should be lighter.

The winds will begin to pick up during the late evening and into the overnight hours across Southern New England, with gusts reaching 20 to 40 mph at times. Wind chills return to the low teens across Greater Boston and into the single digits to the west.

Wind chills will range from the negatives to the low and mid-teens Sunday evening.Boston GlobeThe storm will be in firm place of Southern New England by Sunday evening.Boston Globe

Monday: The cold and snow linger

You can expect this cold wave and snow to persist well into Monday. Some drier air will finally infiltrate the snow and cause the intensity to lighten up with dry stretches mixed in. But accumulating snow will continue to fall on Monday, while temperatures struggle to reach the mid-20s across Greater Boston.

A preliminary look at forecast snowfall accumulations for New England from this weekend storm. This is an early look kand these totals and impact areas are likely to change.Boston Globe

Join Globe lead meteorologist Ken Mahan and an expert panel of top weather and climate science leaders on Jan. 29 for an in-depth discussion on New England’s changing seasons and how climate change has transformed our region’s landscape. The free event will take place at 6 p.m. at the New England Aquarium, or you can join in virtually. Sign up here.

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Ken Mahan can be reached at [email protected]. Follow him on Instagram @kenmahantheweatherman.