https://www.weather.gov/unr/1943-01-22 the temperature had suddenly jumped to +45ºF the temperature had suddenly jumped to +45ºF http://www.weather.gov/unr/1943-01-22 Black Hills the temperature had suddenly jumped to +45ºF record-breaking temperature change National Weather Service https://www.weather.gov/unr/1943-01-22 Weather National Weather Service/NOAA