National Weather Service United States Department of Commerce

Heavy Snow and Cold in the Upper Midwest; Areas of Locally Heavy Rain

Two Systems, one from Canada, and the other in the Southwest will merge into one as they progress eastward early to mid this week. Heavy snow, blowing snow, and much below normal temperatures can be expected in the Upper Midwest. Rain - some locally heavy - will develop along and ahead of the front. Behind the front will be patchy areas of a wintry mix. Read More >

Slide 12

Misconception  of Tornadic Winds

One misconception is that the wind associated with a tornado is confined to within the visible funnel cloud. This might be analogous to thinking of the tornado as a vacuum cleaner hose hanging out of the sky. One possibility why many people think that being under an overpass offers protection is that with something above them, the bridge will prevent the wind from going ‘up’ underneath the overpass.

A description of the situation much closer to reality is presented in slide 14 and slide 5.

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