331 SXUS73 KFSD 201121 RERFSD RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 520 AM CST WED FEB 20 2008 ...RECORD LOW TEMPERATURE TIED AT SIOUX FALLS... AT 513 AM...THE TEMPERATURE AT JOE FOSS FIELD DIPPED TO 19 DEGREES BELOW ZERO. THIS TEMPERATURE TIES THE LOWEST ON RECORD FOR THE DATE...SET IN 1918. $$ CHAPMAN