National Weather Service United States Department of Commerce

Severe Weather Today; Tropical Storm Cristobal; Dangerous Heat Over the Southwest

Clusters of strong to severe thunderstorms are possible today from parts of the northern and central Plains east into the northern Mid Atlantic. Tropical Storm Cristobal will meander over the Bay of Campeche before lifting north across the Gulf of Mexico on Friday. Excessive heat is forecast Wednesday and Thursday over the Desert Southwest including Phoenix and Las Vegas. Read More >

Slide 13

Misconception  of Tornadic Winds

Another misconception that is closely tied with the one described in slide 12 is that wind is confined to areas only INSIDE the visible funnel cloud. Generally speaking, the misconception is that the overpass bridge protects people underneath it by preventing the tornadic airflow from reaching the people.

A description of the situation much closer to reality is presented in slide 14 and slide 15.

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