The weekly update to the US Drought Monitor is due out later this morning and will likely continue to show northwestern Iowa as the worst off portion of the state. While rains have fallen over the area over the past few months, they have not been enough to erase longer term deficits. The featured chart presents a heat map of daily trailing 90 day precipitation percent of average values for Sioux City since 2002. The value shown at a given day represents the trailing 90 day period. So the bottom row shows the 2022 daily values and you can see the transition from darker reds in February and March to showing closer to average, but still below these past two months. Of course, if you trend water long enough, you can make it to shore (long term deficits are erased by attrition). More significant rains would certainly be welcome to ensure enough water for the growing season, but the charts only show major positive departures during the summer months for one year (2014) over this period.

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