We continue to monitor just how cold it will be getting in the next 24 to 48 hours. Early this morning, much of the state was upgraded to a wind chill warning in part of the impending life-threatening cold.
Not much has changed in the way of temperatures since yesterday’s update, but when it becomes this cold, a few degrees plus or minus will hardly be noticeable.
To recap what we are expecting. The coldest temperatures will be along and north of highway 20 in northern Iowa. This is were wind chills Monday morning will feel like -45°F to -55°F. From Des Moines and to the south, wind chills will feel like –35°F to -45°F. During the day Monday, temperatures will gradually warm up a tad, but will still remain well below zero. Wind chills in northern Iowa will be between -35°F to -45°F Monday evening, with wind chills between -30°F and -40° from Des Moines and to the south. Wind chills Tuesday morning will remain about the same as they were from Monday evening.
This will be the coldest it has been in the last 20 years. If you remember 20 years ago, you may recall that wind chills were lower than they will be in the coming days, so how can this be if it is the coldest we have seen in the last 20 years? This is because 20 years ago, a different wind chill chart was used, making temperatures seem lower. That chart has been improved on making it more accurate today so if you see from the graphic at the top of your page, if you implied the same conditions that we will see on Monday to 20 years ago, that would make wind chills between -60°F and -80°F. This is why Monday will be the coldest we have seen it in the last 20 years.
Just a reminder, that wind chills across northern Iowa will be very dangerous that frost bite can occur in 10 minutes or less. Across central and southern Iowa, frost bite can occur in 10 minutes to as much as a half an hour. Because of these dangerously cold wind chills, some schools are preparing to close or at minimum a 2 hour delay. If you will be heading outside on Monday, make sure to limit your time outdoors and bundle up and leave no exposed skin. We will continue to track the very latest over the next 48 hours right here at Iowachase.com.