Quote:
Originally Posted by ken0042
The Red River Valley in Winnipeg had them, but once again it was pretty shallow.
IIRC Calgary right on the western edge of where tornados can form. I would think Drumheller is still flat enough for one to form.
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Ya, there have been lots up top. There was one sighted around Three Hills today supposedly ... that's what brought up the latest round of this debate. There's apparently never been one hit in the valley though. Same with where I grew up in the Battle River valley. I've heard various arguements about why ... the best one probably is that updrafts over river valleys prevent tornadoes from touching down in them. That's just a lay opinion though. I'd like to hear if there has either been a known tornadoe strike in a deeper river valley like the Red Deer's, or if not, why.