The rainfall totals for September continue to amaze with today's feature denoting the largest seven day precipitation total by year for Waterloo. The top left panel shows the seven day period with the color representing the total. The bottom left panel shows the frequency of a given day of the year participating within this maximum period each year. The top right panel shows the yearly maximum value. The bottom left panel shows the cumulative distribution. The 2026 value is currently 4.46 inches ending on 20 September. The bottom left panel interestingly shows these events being more frequent during September than during August for the site! September is even comparable to the climatologically wetter months of May, June, and July.