Some previous hopes for precipitation over this past weekend turned out as empty as the rain gauges over the state with dry and warm weather dominating. The featured chart for today looks at the driest 45 day stretch each season (here defined starting on 1 July) for Des Moines. The bottom left panel shows the frequency of a given day of the year participating within such a period. Such periods are typically limited to the coldest part of the year, so having such a stretch from September into October is rather exceptional, but not without precedent. This analysis indicates that a 45 day stretch during the 1952 season had no measurable precipitation. The caveat with such plots is that sometimes archives of climate data are not great delineating between zero precipitation and precipitation reports as missing / not reported, so caveat emptor!

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