Temperatures will fall into the upper teens by midnight with lows in the single digits.
A breeze will produce wind chills below zero, especially north and northwest, where a wind chill advisory will be in effect from 1 a.m. to 10 a.m. for the counties of Mercer, Auuglaize, Logan, Shelby, Darke, Randolph, Ind. and Wayne, Ind.
The sun will peek out by midday Wednesday, but it will be cold and breezy with highs in the mid-teens and wind chills in the single digits.
An early snow shower is possible Thursday for areas north of Dayton. Temps will start out around 10 and below zero wind chills before rising to highs in the upper teens.
High pressure will build early Friday and temps will drop to single digits, but there will be clear skies and light winds.
Temps will rise into the upper 20s by late Friday afternoon before clouds move in and a chance for light snow after midnight.
"Light snow tapers off around sunrise with a half inch or less expected but there's the potential for slick spots early Saturday," Simpson said. "We'll see some afternoon sun and rise above freezing in the afternoon with highs in the mid-30s."
Snow arrives Sunday morning and there's a potential for some ice or rain in the afternoon, especially south of Dayton.
"If we stay cold enough we could be looking at a significant snowfall," Simpson said. "Highs will be near freezing after a start in the upper 20s."
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