Our office calculated these wind chill temperatures by applying the current formula to historical values, possibly leading to small errors.
The winter of 2013-2014 reminded "seasoned" Twin Cities residents of winters of yore. Wind chill temperatures, the "feels like" temperature accounting for the combined influence of air temperature and wind speed, have dropped to dangerous levels many times this winter.
The National Weather Service issues Wind Chill Advisory when conditions are anticipated to be potentially hazardous. A Wind Chill Warning is issued when wind chill temperatures are projected to be life threatening. To learn more about wind chill and its hazards, see: National Weather Service Wind Chill Information.
The Twin Cities National Weather Service Forecast Office uses -25 degrees F as the threshold for issuing a Wind Chill Advisory and -35 degrees F for a Wind Chill Warning (see: National Weather Service Warning Criteria).
Historical Twin Cities hourly temperature and wind speed data were assessed to determine the frequency at which the Advisory and Warning thresholds are reached. The data were also utilized to ascertain winter-by-winter low wind chill values in order to provide each generation of Twin Citians with “bragging rights”. The lowest wind chill value found over the 1905-2014 period was -67 degrees F, occurring on January 22, 1936.
Winter 2013-2014 summaries found in the graphics below include data through March 3, 2014. Wind chill temperatures for all years were calculated using the formula implemented by the National Weather Service in 2001. The first graphic includes wind chill temperatures though January 2019.
Number of Wind Chill Warning Threshold Days
Number of Wind Chill Advisory Threshold Days
Wind Chill Extremes for Each Winter