17 tornadoes in 2 days
In Dallas-Fort Worth, Texas between January 9 and January 11, 2012, multiple tornadoes touched down in the area. It begs the question, why so early?
Frank Marsik, an Associate Research Scientist and Lecturer within Michigan Engineering's Department of Atmospheric, Oceanic and Space Sciences (AOSS) states, "This past winter, two large-scale phenomena (La Nina and Arctic Oscillation) combined in a way that kept arctic air well north of the U.S.-Canadian border resulting in a very mild winter for much of the United States."
He continues, "In fact, the Cooperative Weather Observation Station here at AOSS reported the warmest March on record for the site (dating back to 1880). The ability for warm and humid conditions to move so far northward so early in the season has contributed to our early thunderstorm and severe weather activity."