I have read of 60° temperature drops. Usually in tales from the 1800's where ill prepared amateur buffalo hunters were lucky enough to freeze to death before being lashed to their wagon wheels and burned too death by justifiably outraged natives who really needed the buffalo.
Or the legendary "Blue Northers" of Texas cattle drive tales. The same drives that were really responsible for the demise of the buffalo herds.
I never thought I'd live to see one. I was feeling enough better yesterday afternoon I went for a walk of about oh, 1,400 yards in the beautiful 72° weather. I returned so frisky and filled with dismay that I was not out in my new from last Summer, Ultimate Fishing Machine, (hereafter referred to as the UFM), that I started re-installing all of the accessories I removed for Winter. At 3:49 pm a blast of unwelcome Northerly wind hurled open the side pedestrian door of my pole shed and rudely announced a change was en route.
I shut down operations and repaired to my recliner to further enjoy my Covid/Pneumonia recovery. When I went to bed after Perry Mason at 9:00 pm it was 40°. At 3:34 am it was 16° and at dawn it was a bone chilling 11° and still is. If that is not bizarre enough, tomorrow's forecast is for a high of 52°.