631 SXUS99 KFSD 181046 RERFSD RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 545 AM CDT SUN AUG 18 2002 ...NEW RECORD LOW TEMPERATURE AT SIOUX FALLS... AT 515 AM CDT THE TEMPERATURE AT SIOUX FALLS AIRPORT FELL TO 44 DEGREES...SETTING A NEW RECORD LOW TEMPERATURE FOR THIS DATE...AUGUST 18TH. THE PREVIOUS RECORD WAS 45 DEGREES...SET IN 1897 AND TIED IN 1950. $$