Experimental Snowfall Forecast

Please Note: This Snowfall Forecast graphic will be displayed only when significant snowfall is expected within the next 72 hours.  This graphic typically represents ADDITIONAL snowfall expected, and will not always reflect the total snowfall for an entire event. The times at the bottom of the graphic specify the time period during which this forecast graphic is valid.
Please check the HAZARDOUS WEATHER OUTLOOK, the 6-hourly snowfall amounts and forecast weather on our FORECAST GRAPHICS PAGE, or the latest WINTER WEATHER MESSAGE  for further detail regarding specific amounts and timing. 

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:
Black = less than 1/2 inch. <1/2": Black
Purple = 1/2 inch to 2 inches. 1/2"-1": Light Blue
  1"-2": Medium Blue
Blue = 2 to 4 inches. 2"-3": Dark Blue
  3"-4": Light Green
Cyan = 4 to 6 inches. 4"-6": Green
Green = 6 to 8 inches. 6"-8": Yellow
Yellow = 8 to 10 inches. 8"-10": Orange
Orange = 10 to 12 inches. 10"-12": Red
Red = 12 to 16 inches. 12"-16": Purple
White = greater than 16 inches. >16": White

Event Total Snowfall Forecast for the State of South Dakota

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.