Crop & Pest Report


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Weather Forecast: (06/29/17)

The June 29 through July 5, 2017 Weather Summary/Outlook

It was both cool and dry across much of the North Dakota Agricultural Weather Network (NDAWN) this past week. Temperatures averaged 5° to 10° below average in eastern North Dakota into northwestern Minnesota with temperatures still below average but noticably warmer in southwestern North Dakota. Those warmer temperatures in southwestern North Dakota were partially attributed to a slightly warmer air mass in that area, but also because of the very dry conditions in that region as dry soils have a noticeable impact on near surface air temperatures.


Very little rain fell during the past week until Tuesday Night and Wednesday. Wednesday rain data was unavailable in map form at publishing time, but one to three inches of rain fell Wednesday in portions of east central North Dakota into northwestern Minnesota. Parts of Grand Forks County recorded over 3.5 inches of rain. Yet, a vast majority of North Dakota recorded very little rain, continuing the trend of dryness that started back in March and April of this year.


Although there will be some showers in the area both today (Thursday) and Friday with even some isolated rains on Saturday, the amounts look generally light, plus locations south and west of the Missouri River, the locations that are the driest, look to be getting very little if any rain from these events. Plus, after a few cooler than average days now through Sunday, there are indications that a surge of very warm air will be moving into the state early next week around Independence Day, with triple digit heat possible in western North Dakota on July 4 and 5. All areas of the state should expect above average temperatures next week for at least a couple of days and with that will come many more growing degree days (GDDS) than what was recorde during the second half of June. Estimated GDDs for the period June 29 through July 5, 2017 can be found on the graphic below.


Northeastern North Dakota into northwestern Minnesota should see an increase in high relative humidity (RH) hours, especially in the next few days associated with the rain from Tuesday night into Wednesday. Estimated hours with RH above 85% from June 29 through July 5, 2017 is given in the graphic below.


Using May 10, 2017 as an average planting date, the number of corn growing degree days accumulated through June 27 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. New inversion data (for spray drift concerns) can also be found on the NDAWN website in the table section of the current weather link, with additional stations added earlier this week.


Using a plantiing date of May 1, 2017, the number of wheat growing degree days accumulated through June 27 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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