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It's the first week of spring: Get ready for snow, Milwaukee.

A winter storm watch from the National Weather Service in Sullivan will be in effect for much of Wisconsin north and west of Milwaukee from Wednesday evening through Thursday afternoon, with 6-10 inches of snow possible in some areas.

Milwaukee is set to receive at least 2 inches, according to the latest projections. So if that 71-degree day earlier this month prompted you to put away the snow shovel, you might want to dig it out again.

Heavy snow totals forecast north of MSN and MKE Wed nt-Thu, but expect shifts to the north or south as storm nears. pic.twitter.com/r9beuRuTBF — NWS Milwaukee (@NWSMKX) March 21, 2016

But how much snow actual will fall is anyone's guess. "Storm systems this time of year are especially difficult to predict, and this one is't doing anything to prove that," the National Weather Service office in Sullivan said Monday in an online post about the coming storm.

It depends on whether the storm tracks to the north or to the south, and how much moisture it picks up along the way. Be prepared for the forecast to change one way or the other as the storm gets nearer to Wisconsin.

It already has been a roller-coaster of a March, with freezing temperatures and several inches of snow to start the month. That was followed by a rapid warmup, with the high in Milwaukee hitting 71 on March 8. That didn't break the record for the day, but the 67 degrees recorded on March 9 did.

After that, temperatures retreated into the 30s and 40s until last weekend, when the low Sunday dropped to 28, just below normal for this time of the year.

The high temperature is expected to rise to the 50s on Tuesday, then drop into the 30s on Wednesday and Thursday, when the storm could bring snow, rain or a mix of the two, depending on how far north you are.

The statewide map of snowfall projections on Monday showed the heaviest band of snow cutting through the center of the state, with much lighter snow due to the north and the south.

"Remember, these accumulations and the area affected will likely fluctuate over the next couple days as we narrow in on the exact path of the storm system," the National Weather Service said.