475 SXUS99 KDSM 151227 RERDSM RECORD EVENT REPORT NATIONAL WEATHER SERVICE DES MOINES IA 727 AM CDT SUN AUG 15 2004 ...RECORD LOW TEMPERATURES TIED THIS MORNING AT WATERLOO... AT 541 AM SUNDAY MORNING THE TEMPERATURE AT THE WATERLOO AIRPORT DROPPED TO 42 DEGREES WHICH TIED THE RECORD LOW. THE PREVIOUS RECORD WAS 42 DEGREES SET BACK IN 1929. $$ ST