National Weather Service United States Department of Commerce

Long Track Severe Storm Rolls Across South Dakota and Minnesota - July 19, 2017

During the daytime hours of July 19, 2017, a severe thunderstorm developed across portions of northwestern South Dakota and started to track southeast. Before the afternoon was finished, this severe storm tracked across South Dakota, Minnesota, Iowa and eventually finished the day in Illinois. Read More >

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Please Note: This Snowfall Forecast graphic reflects the total snow accumulation expected within the next 60-72 hours. 
This graphic may often indicate ADDITIONAL snowfall expected, and will not always reflect the total snowfall for an entire event.
The times at the top of the graphic specify the time period during which this forecast graphic is valid.

 
Event Total Snowfall Forecast - This graphic will only be displayed when significant snowfall is expected within the next 72 hours.
Key for Total Snowfall Map:
White = zero. Zero: White
Pale gray blue = less than 1 inch. <1": Pale Gray Blue
Light Blue = 1 to 2 inches. 1"-2": Light Blue
Medium Blue = 2 to 3 inches. 2"-3": Medium Blue
Blue = 3 to 4 inches. 3"-4": Blue
Dark Blue = 4 to 6 inches. 4"-6": Dark Blue
Pale Yellow = 6 to 8 inches. 6"-8": Pale Yellow
Light Orange = 8 to 12 inches. 8"-12": Light Orange
Orange = 12 to 18 inches. 12"-18": Orange
Red = 18 to 24 inches. 18"-24": Red
Dark Red = greater than 24 inches. >24": Dark Red
 

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