Today and tomorrow will be very chilly across much of the northern plains. In fact, some flakes in the higher elevations in central and western North Dakota wouldn’t surprise me tonight. In turn, the threat of frost and or a freeze will certainly be possible today through Friday, with northern North Dakota and northern Minnesota having the highest risk. As a reminder, a frost is by definition a temperature of 33 to 36 degrees. Why? Because temperatures are taken from 5 to 6 feet above the ground, meaning near the surface temperatures can be colder. A freeze is 32 degrees or colder. Temperatures near freezing this time of year aren’t unusual, but never welcomed.