A so-called bomb cyclone brought blizzard conditions to Colorado and now heavy rain, flooding and even tornadoes to the U.S. Midwest.
The weather bomb occurs when there is a rapid drop in atmospheric pressure over a 24 hour period.
Further north, the storm is dumping snow across Minnesota as it moves into northwestern Ontario.
Severe thunderstorm watches have been posted for Southern Ontario with strong winds expected along with heavy rain.
New Brunswick will the effects this weekend with significant rainfall and gusty winds in the forecast.