Keep in mind that forecasts presented on the blog were expressed as probabilities so that people could see the areas at highest risk. Meteorologists validate that against a "hindcast" -- a map of what would have been the perfect probabilities based on the reports of what actually occurred.
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From the beginning, this was forecast to be a two-day event. The 11:30am CDT forecast yesterday had to be moved south compared to earlier forecasts. That said, the forecast is excellent. If anything, it is a bit of an underforecast because the 60% threshold was reached.
One of the things that sets meteorology apart is that we validate our forecasts with a goal of always trying to improve.