An arctic air mass brought down by a dip in the jet stream will send much of the US east of the Continental Divide below freezing over the next couple of days. This dip in the jet stream has already brought on sub-zero temperatures and increased DR volume, near mini-cat level, in the West, particularly Colorado and Wyoming, and volume levels will continue to spike as this system makes its way further east and south.
In the south, the standard temperature threshold for a threat of frozen pipes is 20°. Areas as far south as Jackson, MS; Montgomery, AL; and Columbus, GA will see several hours of temperatures below 20° overnight Wednesday into Thursday accompanied by wind speeds in the teens, putting exposed pipes at some risk for freezing and subsequent rupturing on Thursday. High temps in this area will stay above freezing and climb back towards the 50s by early next week.