at around noon on Saturday, stations around the region were reporting winds (in MPH) from NNE at between 25-30, with gusts up to 40, inconsistent with the data posted above.
I did wonder about the reported low windspeed in the METAR I posted, given the weather we had experienced the day before (north west of SD).
Since it was an AUTO METAR, is it possible that the anemometer was stuck? Is there any BITE equipment in an automated weather station?