995 SXUS73 KFSD 171550 RERSUX RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1050 AM CDT THU MAY 17 2007 ...RECORD LOW TEMPERATURE TIED AT SIOUX CITY IOWA... AT 620 AM CDT THE TEMPERATURE AT SIOUX GATEWAY AIRPORT DROPPED TO 35 DEGREES. THIS TIES THE RECORD LOW FOR THE DATE SET IN 1925 AND 1930. $$ SHEEHAN