Crop & Pest Report


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Weather Forecast (05/25/17)

The May 25 through May 31, 2017 Weather Summary/Outlook

Most of the North Dakota Agricultural Weather Network (NDAWN) stations recorded temperatures between 5° to 10° below average during the past week. An exceptionally cool week for the time of year. Although I did not get any reports of snow in North Dakota, there was snow, even enough to accumulate, in the higher terrain in northeastern South Dakota this past Saturday Night.


The precipitation this past weekend was associated with an area of low pressure that stalled and in turn brought several days of cloudy cool weather, especially to eastern North Dakota. Although there was some rain reported on Sunday and Monday, most of the rain that fell in the past week occurred on Saturday afternoon through Saturday Night. Rainfall amounts averaged around one-half inch in the eastern one-third of North Dakota and into northwestern Minnesota at the NDAWN weather stations.


Rain in the next seven days is expected to be highly variable and mostly on the light side, with amounts expected to be near or below one-third of an inch during this period in most locations. There will be some rain today (Thursday), as a cool front system moves through the s

That cool front will not necessarily cause a noticable shift in the air temperature, but it will reinforce the cool air already in place. Besides the rain today, there will be afternoon showers forming during the Memorial Day Weekend. These showers triggered by the sun will be the reason that the rain amounts will be highly variable during this forecast period, as not all areas will record a shower each day, plus these showers will be mostly producing under 0.1 inch of rain in those localized areas. What the showers will mostly do is keep the temperatures lower as they otherwise would be.

The rest of this month will not be as cool as this past week, but temperature will still be below average, meaning fewer growing degree days than normal for the time of year. The projected Growing Degree Days (GDDs) for the next 7 days, Base 32°, 44° and 50° are presented below.


Using May 10, 2017 as an average planting date, the number of corn growing degree accumulated this season is depicted below. The exact numbers based on your actual planting date(s) can be found here: Other agricultural tools can be found in the applications tab in the menu on the left side of the website.


Using a plantiing date of May 1, 2017, the number of wheat growing degree days accumulated so far this season is presented below. The exact numbers based on your actual planting date(s) can be found here:





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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