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Weather Forecast (05/06/21)

The May 6 to May 12, 2021 Weather Summary and Outlook

In the past week the Wolverton, Minnesota North Dakota Agricultural Weather Network (NDAWN) station recorded a high of 90° on Saturday, May 1 and on Wednesday, May 5 parts of central and southeastern North Dakota recorded some late season snow.  The “joys” of spring in this area.  That transition from the warmth to the cold did bring some rain Sunday into Monday, plus the snow previously mentioned was associated with a weak disturbance that brought moisture into some parts of the region as well.  The 7 day totals through 11 AM, Wednesday, May 5 is presented in Figure 1.


Taken as a whole, this past week was near average with none of the days near the average as most of the time we were either well above or below normal (Figure 2).


 There is an upper-level low near Hudson Bay that is retrograding (moving east to west) toward North Dakota.  That upper-level low is blocking the warmer air to our west and southwest from moving back into the Northern Plains.  It will take a few more days for this pattern to break.  Meaning, there will be a day or two with temperatures at least near normal, but overall it looks like we will have to wait another week to see a longer term warm up.  This will also mean there will be several frost or freeze threats in the next week.  The best chance of precipitation in the next week will be Saturday mainly in areas along and west or south of the Missouri River.  That blockage in eastern Canada will probably not allow that moisture to move into eastern North Dakota.  Yet, on a positive note that atmospheric block may allow the rain to linger in western North Dakota a bit longer increasing the odds of higher rainfall totals in locations that are currently the driest. The projected growing degree days (GDDs) base 32° for the period of May 6 through May 12, 2021 can be found in Figure 3. Because of the continued below average temperatures, only Base 32° is being projected this week.



Daryl Ritchison


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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