Crop & Pest Report


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Weather Forecast: (06/08/17)

The June 8 through June 15, 2017 Weather Summary/Outlook

The past week brought scattered areas of rainfall, but most of the reports were under one-third of an inch. There were some exceptions in east-central and northeastern North Dakota when some slow moving thunderstorms last Friday evening produced localized 1 inch or more rains. Rainfall totals at the North Dakota Agricultural Weather Network (NDAWN) are presented below. The totals do not include the rain from Wednesday morning that was around one-quarter of an inch at some locations within the Red River Valley.


The previous two weeks were quite chilly, but this past week was the opposite with temperatures averaging anywhere from 5° to 10° above average. These next seven days are anticipated to be well above average once again.


It is expected that there will be a subtle change in the weather patterns over North America during the next 7 to 10 day period. An upper-level low over the North Pacific Ocean which forced an upper-level ridge over the northern plains in recent weeks (and the mostly dry weather) is expected to move into the Pacific Northwest states early next week. This will adjust the upper level winds to be more southwesterly. A southwest flow in the upper level winds allows for storms to pull in more Gulf of Mexico moisture and it is storms moving from the southwest to the northeast that tend to bring our region a signficant amount of the averaged yearly precipitation. With this southwest flow will come precipitation opportunities this weekend (two waves) and another chance or two early to the middle of next week. Rainfall almost always varies greatly and likely will during the next 7 days but at least the pattern will be a bit more conducive to rain then it has been the past few weeks.

This slight pattern shift will not change the temperatures much with another warm week expected. With the warm temperatures will come abundant growing degree days (GDDs). The projected GDDs for the next 7 days, Base 32°, 44° and 50° are presented below.


Starting this week the projected hours with relative humidity (RH) values above 85% will be given. With warm temperatures, dry soils and scattered moisture, high RH hourly values are expected to be below normal for the time of year.


Using May 10, 2017 as an average planting date, the number of corn growing degree days accumulated through June 6 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 planting date of May 1, 2017, the number of wheat growing degree days accumulated through June 6 is presented below. Exact numbers based on your actual planting date(s) can be found on the NDAWN Center site.



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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