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Weather Talk: 30-year trend correction

In this space in Monday's paper, I wrote about several 30-year trends in our local climate but I made one mistake which should be corrected. I mistakenly wrote there has been a two degree rise in the average temperature over the past 30 years in ...

In this space in Monday’s paper, I wrote about several 30-year trends in our local climate but I made one mistake which should be corrected. I mistakenly wrote there has been a two degree rise in the average temperature over the past 30 years in Fargo Moorhead. Actually, that two degree rise took place over the entire Twentieth Century. The average temperature for the past 30 years in Fargo-Moorhead has remained essentially steady, with no discernable trend. I casually looked at the wrong graph.  The other 30 year trends were correct as written. Average precipitation is up 15 to 20 percent (4-5 inches per year). Average annual snowfall has risen about 10 inches from 40 to 50 inches per year.  The frost free season has increased 3 to 5 days. The average number of 90 degree days in a year has dropped from 13 to 15 per year to about 10 to 12 per year. 

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