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Weather Forecast (06/14/18)

The June 14 through June 20, 2018 Weather Summary and Outlook

This past week brought widespread rain to much of the North Dakota Agricultural Weather Network (NDAWN).  One inch or more rain fell across even more areas than what occurred last week (see Figure 1). Usually this time of year the rains tend to be more hit and miss, but widespread rains occurred on two occasions in the past week and I would not be surprised if we record widespread rains in the next seven days as well.


Much of eastern North Dakota and northwestern Minnesota, as well as eastern Montana recorded temperatures just a bit above average these past seven days with temperatures 1° to 3° above normal. Much of central North Dakota was much warmer with temperatures 5° to 8° above average (see Figure 2). The past month has been quite warm, but the odds favor the next seven days recording temperatures below average at most of the NDAWN stations.   


A storm system has developed in the northern Rockies and will be moving across the area in the next 24-30 hours.  Thunderstorms are expected to develop later today (Thursday) in western North Dakota and then move east overnight.  Some severe weather, as is often the case this time of year, should be expected.  Although amounts of course will vary, many parts of the area should see some rainfall from this system.  Then over the weekend, yet another storm system will be moving across the Northern Plains and that system may bring two or three waves of rain with it.  Each wave probably hitting different locations, but this weekend will be another period where many areas will record at least some precipitation.  The weekend storm coming in after a cold front on Friday morning, will likely reinforce the cooler air already in place by that time, plus the cloudiness associated with the rain will also keep most areas on the cool side for the middle of June.  In turn, these next seven days are expected to be cooler than normal for much of the region with the one possible exception being the southeastern corner of North Dakota into west central Minnesota.  With these many chances of rainfall, clearly any worries that 2018 would be similar to 2017 will not be a concern anytime soon.  June is historically the wettest month of the year and there will likely be dry periods coming in July and August, there almost always is, but so far, with a few exceptions, dry is not an immediate concern.  My projected growing degree days (GDDs), Base 50°, 44° and 32° for the period of June 14 through June 20, 2018 is presented in Figure 3.


Using May 5 as a planting date, the accumulated wheat growing degree days (Based 32°) through June 12, 2018 is presented in Figure 4.  You can find your exact GDDs for your planting date(s) at:


Using May 10 as a planting date, the corn accumulated growing degree days through June 12, 2018 is presented in Figure 5.  You can find your exact GDDs for your planting date(s) at:


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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