Crop & Pest Report


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Weather Forecast (05/30/19)

The May 30 through June 5, 2019 Weather Summary and Outlook

Some scattered areas of rain occurred this past weekend, but, generally speaking, almost all the rain that was recorded in the past week occurred last Friday, May 24 (Figure 1). That rain was the last in a series of three storms that produced anywhere from two to four inches of rain across much of southern North Dakota, with the northern one-third of the state mostly recording under one inch.  There will likely be some moisture in the next week, but the pattern that has brought widespread rain events to not only our region, but throughout the corn belt, seems to be finally breaking down.



Temperatures have finally warmed up to more seasonal levels in the past couple of days, but the past week, as a whole, finished anywhere from three to six degrees below normal. The next week should be a rare week in recent months with temperatures near or even a bit above average, bringing some much needed heat units to the region.


The upper-level wind flow has been dominantly from the southwest for the past couple of months. Storms that move in from the southwestern part of the United States to the northeast have the ability to draw in moisture form the Gulf of Mexico and in turn is the wettest pattern for areas east of the Rocky Mountains. That persistent pattern is breaking down and the mean upper-level wind flow will become more west to east and, in turn, more typical weather for June is anticipated for the next week or two. My projected Growing Degree Days (GDDs) for the next seven days for Base 50°, 44° and 32° is presented in Figure 3.


Using May 5 as a planting date, accumulated growing degree days for wheat (base temperature 32°) is given in Figure 4.  You can calculate wheat growing degree days based on your exact planting date(s) here:


Using May 15 as a planting date, accumulated growing degree days for corn (base temperature 50°) is given in Figure 5. You can calculate corn growing degree days based on your exact planting date(s) here:



Daryl Ritchison


Director of the North Dakota Agricultural Weather Network



This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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