480 SXUS99 KDSM 212241 RERDSM RECORD EVENT REPORT NATIONAL WEATHER SERVICE DES MOINES IA 541 PM CDT FRI MAY 21 2004 ...RECORD DAILY MAXIMUM RAINFALL SET AT WATERLOO... A RECORD RAINFALL OF 1.73 INCHES OCCURRED IN WATERLOO AS OF 5 PM TODAY. THIS BREAKS THE OLD DAILY RAINFALL RECORD...OF 1.47 INCHES BACK IN 1939. $$ GRAMS