000 SXUS73 KFSD 202234 RERSUX RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 0428 PM CST SAT JAN 20 2024 ...RECORD LOW TEMPERATURE SET AT SIOUX CITY IA... A RECORD LOW TEMPERATURE OF -20 WAS SET AT SIOUX CITY IA TODAY. THIS BREAKS THE OLD RECORD OF -19 SET IN 1970. $$