For many days this month the upper-air data from Yuma, Arizona, have been very suspect. See the plot at 500 mb above from 12 UTC this morning, with data plotted at Yuma being obviously bad. The sounding plot below shows what the problem is. Some time this month data were entered with a date of March 29, 2014. This bad sounding will apparently stay in the UA system until we get past March 29th. Why the problem has not been identified and corrected is a bit of a mystery.
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