Crop & Pest Report


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Weather Forecast (05/09/19)

The May 9 through May 15, 201 Weather Summary and Outlook

It may surprise you that temperatures in April were near or just a bit below average across the NDAWN (North Dakota Agricultural Weather Network) mesonet (Figure 1). So, although many thought of it as a cold month, it really would be considered average. It is a reminder that spring is often slow to arrive in our region. What hindered most of us getting into the fields was the moisture which was near or above average across much of the Northern Plains last month. Plus, the two significant snow events only added to the problems in getting “Plant 19” started.


Although April was wet, the first week of May has been, overall, fairly dry with a few exceptions (Figure 2). The rain from yesterday (Wednesday, May 8 and not included in the graphic) was generally light with some exceptions near the North Dakota / South Dakota border.


Speaking of rain, the next time frame when precipitation will fall looks to be Saturday. The rain will be associated with an “Alberta Clipper” type storm coming in from our northwest. Precipitation amounts look like some locations probably only recording a trace or a few hundredths of an inch, but other localized areas may get around a quarter of an inch. Starting on Sunday, warmer air will be moving back into the region, but only temporarily. Sunday through Wednesday temperatures should be near average with a day or two even above average for the time of year. By the end of next week, the pattern would suggest that cooler air will be back into our area. The positive news in the next couple of weeks will be conditions favor below average rain; the negative news is that besides some brief periods of warmer air, the pattern continues to favor below average temperatures.

My projected GDDs for the period of May 9 through May 15 is presented in Figure 3. Base 50 is not included this week as the weekly totals at that level will be near zero in most locations.



Daryl Ritchison


Interim 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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