This past weekend experienced Iowa's heaviest rainfall since April of this year. This was thanks to an increase in moisture and efficient rainfall producers. The dew point temperature rose significantly into the weekend from 14 degrees on Friday morning to 64 by Saturday evening for Waterloo, which makes for a 50 degree jump in just under two days. Checking back on the archives of data for Waterloo, the largest two day change in dew point on record occurred on 17-19 January 1996 when the dew point went from 50 down to -21 degrees (71 degrees). When just considering rises in dew point over two days, 56 degrees was the maximum back on 1-3 July 1949.

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