The southeast Wisconsin, Waukesha and Milwaukee forecast for the rest of your Sunday night, clouds will be building in, but we should stay quiet. Overnight lows will bottom out in the lower-20's before actually rising into the upper-20's by the early morning hours. That's a sign of things changing.
Monday, things will go downhill as the day wears on. It will be quite breezy and mild, and a little rain will develop as the day wears on. We might mix in a few snowflakes during the day mainly to the northwest, but it shouldn't be an issue if you do see any of them. Highs will top out in the low-40's.
Monday night, any of that rain will change over to some snow showers. This will not be a big accumulator at all with totals for the night of only a trace to up to 1 inch. That's it. Overnight lows will be in the upper-teens and you will notice those winds picking up as well.
Tuesday, it's going to be colder again and the wind is going to make it feel worse. We'll see a few scattered flurries or snow showers, but don't expect much in the way of accumulation. Highs will top out only in the low-20's.
Wednesday will be on the cool side, but we'll see more sun. Highs will top out in the low-20's again.
We're still watching the potential of some shoveling snow mainly on Thursday night into Friday. We have a long way to go before it rolls in, but as of the moment, it does NOT look like a big snowstorm.