Quote:
Originally Posted by Glacierx
Just out of curiosity, what's the record going the other direction? (Hot to cold)
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It looks like the record drop is 100F in 24 hours, from +44 to -56 (+6.7 to -48.9C). Browning, Montana January 23 to 24, 1916.
Record drop in 12 hours appears to be 84F, from 63 at noon to -21 at midnight (17.2 to -29.4C) in Fairfield, Montana. December 24, 1924.
Rapid City, SD dropped from +62 to -13 in two hours (16.7 to -25C) on Nov 10, 1911 during the
Great Blue Norther of November 11, 1911 when some locations a tornado and a blizzard back to back days (the same day in one place)
The most dramatic example was January 22, 1943 in Spearfish, SD where the world record temperature change (+49F in two minutes) was recorded. Temperatures went from single digits to 50F and back several times that day. This link (and especially the pdf it mentions at the bottom) show just how much it changed and why the changes happened.
The Black Hills Remarkable Temperature Change of January 22, 1943
Madison probably has had some 50 degree ranges, maybe even 60 but probably not more than that. The biggest change I see from the the past few years was a 75/29F (24/-2C) day on April 1st this year and a drop from 39F to -14F in about 30 hours in December 2013.
Back when I was in school there was an afternoon high of 91F/33C the second to last day of school (early June) but the last day of school it was only 52F/11C and cloudy.
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