810 SXUS99 KFSD 180836 RERFSD RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 335 AM CDT SUN AUG 18 2002 ...RECORD LOW TEMPERATURE TIED AT SIOUX CITY... AT 245 AM CDT THE TEMPERATURE AT SIOUX CITY AIRPORT FELL TO 47 DEGREES...WHICH TIES THE RECORD LOW FOR THIS DATE...AUGUST 18TH...SET IN 1997. AT 300 AM THE TEMPERATURE HAD RISEN A DEGREE BACK TO 48...BUT COULD STILL FALL AGAIN TO OR BELOW THE RECORD EARLY THIS MORNING.