For temperature and precipitation, it has been well established that this growing season has been a lot like 1988 (our previous worst drought year). It is interesting when other metrics, like the one presented in today's feature plot, equal 1988 as well. The featured chart presents the number of days per year with at least one tornado warning issued for somewhere in the state of Iowa. Due to the nature of having severe convection happen over midnight, a day is considered to be a 24 hour period ending at 7 AM. This year has only seen 6 days, which is the smallest total since 1988! The green bar represents the number of days after 19 August until the end of the year. 1988 saw an additional day with tornado warnings issue, will 2012 as well?

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Tags:   tornado