Research reveals that climate change may be causing tornado alley to shift East, out of traditional tornado alley of the Great Plains and into parts of the Mississippi Valley. Louis Post-Dispatch via APĪs the day progressed, the wind fields strengthened helping to create the dynamics, or "spin," in the atmosphere needed to produce tornadoes.Ī cold front charging through the region provided the trigger for the storms, which with all the ingredients in place created ripe conditions for a tornado outbreak.Ĭompounding the favorable atmospheric ingredients is the fact that the United States is currently in a La Niña pattern, which historically increases tornado frequency across the Mississippi Valley.Īnd climate change may also have played a role. A woman searches for valuables amidst the remnants of a home on Dec. This warmth, combined with high humidity, provided ample fuel for the storms. Friday featured unseasonably warm and record-setting temperatures that felt more like Spring than mid-December. This event was caused by a volatile atmospheric set up that was primed to produce violent and long-track tornadoes. That was 3,125 days ago and the longest streak on record. Exceptionally rare, these tornadoes can produce wind speeds higher than 200 mph. An EF5 tornado is the strongest designation a tornado can receive.
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