IEM Daily Feature
Tuesday, 05 May 2015

Rainfall Variability

Posted: 05 May 2015 05:42 AM

The featured map displays NOAA MRMS "Q3" precipitation estimates for Monday. The map shows a lot of variability over the state and even within counties with the amount of rainfall received. The typical thunderstorm is smaller in horizontal size than an Iowa county, so their exact track can lead to large differences in precipitation over a single county. The hope is that over long enough time periods, these individual thunderstorms start to even out totals over a county but that is not always the case.

Good = 22
Bad = 13
Abstain = 8