This website is dedicated to the study of snow and other winter weather, including case summaries of individual storms, winter precipitation processes, and climatology. The site focuses on Duluth, MN and vicinity including Superior, WI at the western tip of Lake Superior and also covers others parts of the country that are of interest. The content relies heavily on personal observation and experience but includes references for support and links to additional education for those interested.

SNINCR is a remark that can be placed in Meteorological Aerodrome Reports (METARs) and stands for "Snow Increasing Rapidly". For example, "SNINCR 2/8" indicates 2 inches of snow accumulated in the past hour with 8 inches total on the ground.

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Snowstorm Enahnced by Standing Atmospheric Wave - Duluth, MN
January 23 to 26, 2010
(Image from National Weather Service Radar Duluth, MN)


The unnamed hurricane which occurred at the end of October to start of November 1991, made famous in the movie "The Perfect Storm", is shown in this NOAA satellite image. But another storm is also raging. Look at the satellite image again and notice on the upper left edge of the image the big swirl of clouds over Minnesota, Wisconsin, and Iowa. That storm became known as the Halloween Blizzard of 1991. From October 31st to November 3rd the storm buried eastern Minnesota and adjacent sections of western Wisconsin with 24+ inches of snow generally along interstate 35 from Minneapolis to Duluth and the arrowhead of Minnesota. Duluth received 36.9 inches, the largest snowstorm on record for the city.