A arctic high pressure will move from the plains to the Ohio valley tonight into Friday. This will allow for clear skies and cool temperatures. A light wind tonight combined with below zero temperatures will allow for dangerously cold wind chills.
A wind chill advisory is in effect from midnight tonight to 10am Friday. Overnight tonight, a west wind of 10 to 15 mph will gradually shift to the southwest overnight and will decrease to 5 to 10 mph. Low temperatures will range from 5 to 10 below zero and wind chill readings of 20 to near 30 below zero can be expected. Frostbite can occur in less than 30 minutes to exposed skin with these types of wind chills.
Highs tomorrow will rebound to the mid to lower teens, with wind chills slightly above zero. Clouds will be on the increase tomorrow night ahead of our next weather maker. There is a chance of light snow on Saturday with the greatest accumulation across northeast Iowa. This is where as much as 2 to 3 inches of snow will accumulate from a line from Mason City to Waterloo. The further southwest you go, the smaller the totals will be. Across southwest Iowa, near the Creston area, you will struggle to reach a half inch of accumulation. Winds will not be an issue with this system as they will only be between 10 and 15mph. Snow will then push out by Saturday evening leaving Sunday to be a partly sunny day.
If you are wondering when we will start to warm up, well there is no good news in the forecast. Average for this time of year should be back above freezing, however, in the seven day forecast, we do not make it above freezing. Saturday will feel warm as temperatures will be in the mid to lower 20s, but then another shot of arctic cold air will move in on Sunday. Highs on Sunday will only be in the single digits yet again, but it does appear that we will start to warm it back up late next week. Hang in there as spring is only a couple months away! Think warm, and stay warm!