So what are those conditions? Let s take a look!
How Ice Jams Form:
Well, technically, any kind of thawing could lead to an ice break up, but the type of break up most likely to cause an ice jam would be spurred on by a rapid rise in temperatures, allowing the ice to break up quickly over a short period of time. A prolonged and slow break up of ice is unlikely to cause an ice jam.
If you add heavy rainfall on top of a rapid warm up in temperature, then conditions become even more likely for ice to break up and start flowing down the river.