IEM Daily Feature
Monday, 06 September 2010

Will 70+ dew points return?

Posted: 06 Sep 2010 08:07 AM

The featured chart presents the number of cycles per year that the dew point observed at Des Moines goes from a value above 70 to below 50 and then back to 70+ after 1 August. For 2010, we have already experienced one such cycle and have an outside chance of completing another today with a storm system drawing warm and moist air north. The chart would indicate that returning back to the 70s after our second dip into the sub 50s would not be uncommon. The maximum value shown of 5 cycles was in 1997.

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