Roller Coaster Life--From Freezing to Deep Freeze in Hours

Okay, guys, compared to Winnipeg it's not all that cold this morning (-23 C on the back porch or about -5 F) but tomorrow they're actually predicting temps near the freezing point.

This is not the first time this swing has occurred this winter--much of the snow melted last weekend too.  But wild extremes are what the models show for climate change, right?