759 SXUS99 KFSD 060028 RERFSD RECORD EVENT REPORT NATIONAL WEATHER SERVICE SIOUX FALLS SD 630 PM CST THU FEB 5 2004 ...MOST SNOW ON THE GROUND IN SIOUX FALLS SINCE 1969... AT 6 PM CST...THE SNOW DEPTH AT JOE FOSS FIELD IN SIOUX FALLS WAS 21.0 INCHES. THE LAST TIME THE SNOW DEPTH WAS 21 INCHES WAS ON MARCH 21ST 1969. THE GREATEST SNOW DEPTH EVER RECORDED IN SIOUX FALLS WAS 34 INCHES ON FEBRUARY 21ST AND 28TH OF 1969.