Death comes to us all. Life's but a walking shadow | I was looking at NOAA's graphical forecasts here:https://graphical.weather.gov/sectors/conusWeek.php#tabs and it pretty clearly shows that all of North Dakota, much of eastern South Dakota and much of western Nebraska will experience lows between 30 and 40 Tuesday night. It looks like Minn & Iowa will be right at 40. Of course, there is a very strong likelihood of some locally lower temperatures depending on the wind and cloud cover. If it's clear look for some radiative cooling |