The year was 2011, when a moderate La Niña weather pattern and an active jet stream generated the scenario that's almost identical to what we've experienced so far in 2021. "Severe weather season is really a collection of several short weather events, and anticipating individual events at long lead times is usually tricky," Sam Lillo, atmospheric researcher at the University of Colorado Boulder, told CNN. The deadliest tornado season in modern historyThe remarkable tornado season of 2011 was the deadliest in modern times, with over 550 fatalities -- second only to 1925's total of 794 tornado deaths. Now, the focus shifts to what these long-term patterns could reveal as we head into the spring severe storm season. How La Niña relates to tornadoesSimilar to this year, a moderate La Niña was the main feature in 2011.

Source: The Nation March 07, 2021 02:48 UTC