618 SXUS73 KDMX 291612 RERDMX RECORD EVENT REPORT NATIONAL WEATHER SERVICE DES MOINES IA 1112 AM CDT TUE APR 29 2008 ...RECORD DAILY MINIMUM TEMPERATURES TIED AT WATERLOO...MASON CITY AND OTTUMWA... RECORD DAILY MINIMUM TEMPERATURES WERE TIED IN SEVERAL LOCATIONS IN CENTRAL IOWA THIS MORNING. BELOW ARE THE TIED RECORDS. WATERLOO TIED 25 DEGREES LAST OBSERVED IN 1958. MASON CITY TIED 22 DEGREE LAST OBSERVED IN 1958. OTTUMWA TIED 28 DEGREES LAST OBSERVED IN 1958. $$ 71