664 SXUS73 KDMX 102324 RERDMX RECORD EVENT REPORT NATIONAL WEATHER SERVICE DES MOINES IA 624 PM CDT SAT JUN 10 2006 ...RECORD LOW MAXIMUN TEMPERATURES BROKEN... CLOUD COVER AND A RETREATING FRONTAL BOUNDARY ALLOWED MUCH COOLER AIR TO DROP INTO CENTRAL IOWA THIS AFTERNOON. THIS ALLOWED FOR RECORD LOW MAXIMUM TEMPERATURES TO BE BROKEN AT 2 SITES LISTED BELOW. STATION HIGH TEMPERATURE OLD RECORD MASON CITY 55 59 IN 1908 WATERLOO 58 60 IN 1923 $$