SXUS73 KFSD 150632 RERSUX RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1232 AM CDT MON DEC 15 2014 ...RECORD WARM LOW TEMPERATURE SET FOR SIOUX CITY IA SUNDAY... THE LOW TEMPERATURE IN SIOUX CITY IOWA SUNDAY...DECEMBER 14...WAS 40 DEGREES. THIS SETS A NEW RECORD FOR THE WARMEST LOW TEMPERATURE ON DECEMBER 14. THE PREVIOUS RECORD WAS 37 DEGREES...SET WAY BACK IN 1891 AND AGAIN IN 1928. $$