The featured chart depicts trailing 90 and 180 day arridity index for Centerville (southern Iowa). This index combines the impacts of temperature and precipitation departures. The chart shows a different situation going into this year's growing season than last year. Last year was near neutral during early March while this year is extremely low water stress. The large negative numbers are a result of a cold and very wet winter season. Getting soils warmed up and dried out may be a struggle this spring.

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