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Spring is a season of constant change. So get ready to switch out those wind breakers for mittens.

A blustery cold spell is in the forecast during the first week of April, according to AccuWeather.

But first, a brief warm-up: The thermometer could top out in the 60s on Wednesday, the weather service said.

The same is on tap for Thursday, when there’s also a 70 percent chance of rain.

“We’ll be going from mild mid-60s on Wednesday and Thursday to around 50 by the weekend,” said Sara Schultz, a meteorologist with the NWS station in White Lake Township.

That’s when a “polar vortex” starts to push through, AccuWeather says. Expected to bring “a quick blast of arctic air,” it could take aim over the Great Lakes and northeastern United States the first week of April. Highs could be in the low 40s Saturday and upper 30s Sunday.

“The latest indications are the core of the coldest air associated with the polar vortex will track a bit farther north and east, compared to the outlook from last week,” said Edward Vallee, AccuWeather long-range meteorologist.

Rounds of lake-effect snow are possible as the arctic air passes over the Great Lakes, according to AccuWeather.

The National Weather Service forecasts a chance of snow showers before 11 a.m. Saturday, then rain showers possible and a high near 45.

Sunday’s temperatures could hover in the low 40s — about 10 degrees below normal, Schultz said.

But the cold isn’t set to last long.

“Instead of a week’s worth of arctic air, there may only be three to five days, on average, where temperatures are 10-20 degrees below normal in the northern tier,” AccuWeather meteorologist Joe Lundberg said.

Highs should rebound next week — which is typical for this time of year, Schultz said. “We’re kind of on that roller coaster of temperatures.”

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