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September-October 2017

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May 2017

Abundant May rainfall occurred across the central Plains, as well as the Midwest, South, and East. However, early-month river rises in the wake of late-April downpours led to extensive lowland flooding across the mid-South and lower Midwest.

In stark contrast, mostly dry weather on the northern Plains led to sudden and dramatic drought intensification. By June 4, more than one-third of the rangeland and pastures were rated in very poor to poor condition in South Dakota (40%) and North Dakota (35%), according to the United States Department of Agriculture. Prior to the end-of-month arrival of warm weather across the northern Plains, generally cool conditions were accompanied by several episodes of patchy frost and sub-freezing temperatures.


Weatherwise Contributing Editor BRAD RIPPEY is the U.S. Editor of the Weekly Weather and Crop Bulletin of the Joint Agriculture NOAA Weather Facility.

Weatherwise Contributing Editor JEFFREY B. HALVERSON is Professor of Geography at the University of Maryland, Baltimore County.

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