Change of Season in Upper Midwest

March 15th, 2010 |

MODIS imagery from the Terra satellite clearly show the change in snowcover over the upper Midwest in the past week. The first image, from 6 March, shows widespread snowcover. The second image, from 15 March, shows widespread bare ground. The period from 9 March through 13 March was one of widespread low clouds, fog, and light rain that removed the cumulative effects of 3 months’ worth of snowstorms. Snowcover in Madison, for example, began on December 7th and remained for 93 days, until March 10th. That 93-day stretch was the 6th-longest such stretch of consecutive days with snowcover, tying with a streak in the winter of 1970-1971. The winter of 1978-1979 in Madison had the longest streak of consecutive days with snowcover: 118. (Link).

The imagery above were obtained from the WisconsinView website.

One Response to “Change of Season in Upper Midwest”

  1. scott.bachmeier says:

    On the earlier (06 March) image, there was as much as 23 inches of snow on the ground in far northern Wisconsin, with 35 inches on the ground at Marquette in the Upper Peninsula of Michigan (yet their maximum temperature on that day was an amazing 53ºF !). On the later image (15 March), the maximum snow depth had diminished to 7 inches in far northern Wisconsin and 18 inches at Marquette, Michigan.

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