There's virtually nothing to stop the cold air from off of Hudson Bay from flowing down across the midlands. So you get good contrast: the warm air coming up -- the cold air coming down -- and where they meet is your typical frontal location.

It was apparent that many of the speeds used in the estimates were too large. The scale guiding wind speeds wasn't in tune with reality.

There's virtually nothing to stop the cold air from off of Hudson Bay from flowing down across the midlands. So you get good contrast: the warm air coming up -- the cold air coming down -- and where they meet is your typical frontal location.