Crop & Pest Report


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Weather Forecast (05/24/18)

The May 24 through May 30, 2018 Weather Summary/Outlook

Weather Forecast

The May 24 through May 30, 2018 Weather Summary/Outlook

Widespread rain fell throughout the area covered by the North Dakota Agricutural Weather Network (NDAWN) during the past week. The totals in Figure 1 do not include what fell yesterday. Just about every NDAWN station recorded rain, yet, the amounts varied from significant to  not enough to even settle the dust. These next 7 days will bring several rain/thunderstorm opportunities with each bringing hit and miss type rain amounts.  But with several chances it appears that most areas that are in need of rain will record something beneficial in the next several days.

weather1 2

Even with a couple of days where many of the NDAWN station were recording temperatures in the upper 40s to lower 50s, the warmth of the past few days made up for those cooler afternoons as much of the area recorded temperatures above average over the past week (see Figure 2).

The rest of May looks quite warm with some NDAWN stations recording the first 90° maximums of the year. Even with some 90s expected, high temperatures in the 80s will be more common. These warm temperatures are associated with a large ridge of high pressure expected to become stationary over the northern plains. This will likely break down toward the middle of next week and we may start June with a few cooler than average days, but until then, temperatures should be nearly 10° above average. If your area has adequate moisture, this should allow crop growth to be enhanced and perhaps even catch up a bit from the late planting. In locations without adequate moisture, instead, this early heat would likely cause crop stress. As already mentioned, with multiple hit and miss rain events expected, the odds are many areas will record some rain to help offset this period of early season warmth. My projected growing degree days (GDDs), base 50°, 44° and 32° are presented below in Figure 3.    

Using May 5 as a planting date, the accumulated Wheat Growing days (Based 32°) is presented in Figure 4.  You can find your exact GDDs for you planting date(s) at:

 weather3 4.revisedpng

Using May 10 as a planting date, the accumulated growing degree days for corn is presented in Figure 5. You can find your exact GDDs for your planting date(s) at the embedded hyperlink above.

weather 5

In next week’s report, some news about the Inversion Alert Application that is nearing completion.  It will be available very soon for both Android and iOS devices.

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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