Blizzards in the Upper Midwest

Copyright Lawrence Burkett 2015, minor rev. 2019

Definitions

Blizzard (Schwartz 2005): a severe snowstorm with 1) sustained or frequent wind gusts of 15.6 m s-1 (35 mi h-1) or greater; and, 2) enough snow in the air to reduce visibility to less than 402.3 m (0.25 mi) for three or more hours.

Macroscale (Markowski and Richardson 2011, 5-7): meteorological phenomenon with 1) (lateral) length scales greater than 2,000 km; and, 2) time scales on the order of several days or more.

Mesoscale (Markowski and Richardson 2011, 5-7): meteorological phenomenon with 1) (lateral) length scales ranging from 2-2,000 km; and, 2) time scales on the order of several hours.

Microscale (Markowski and Richardson 2011, 5-7): meteorological phenomenon with 1) (lateral) length scales less than 2 km; and, 2) time scales on the order of an hour or less.