Morning Edition’s Mark Heistad interviews Jim Mathews, forecaster at National Weather Service, about the surprising intensity and amount of snowfall. Mathews details some reasons behind powerful storm.

Lore has claimed it as “The Halloween Blizzard,” and Minnesotan memories and tales have only increased with the passage of time. Snow started falling on the morning of October 31, 1991. By midnight, the storm had dumped 8.2 inches of snow at Minneapolis-St. Paul International Airport, breaking the record for the most snow on that date. By the time it was all done three days later, the storm had dumped more than 2 feet of snow in the Twin Cities and 3 feet in Duluth. The North Shore city’s 36.9-inch snowfall set a record at the time as the largest single snowstorm total for Minnesota.