After finally getting a slightly cooler than average October, November has quickly reversed the recent cooling trend and will finish today well above average. The featured chart presents the monthly temperature departures for Des Moines along with the El Nino 3.4 index since Jan 2007. This index is used for the commonly heard terms of "La Nina" and "El Nino". Sometimes our weather is associated with the phase of this index, but it is not a simple relationship. The forecast to start December looks remarkably warm and will give that month a head start on being above average as well. It also looks to push 2012 far enough ahead to finish the warmest year on record.

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