This is an algorithm that projects precip/snowfall totals extruded from NAM WRF, RUC, GFS, and WRF-ARW models. Explanation can be found here.
South Dakota
Sioux Falls
Aberdeen
Huron
Pierre
Sioux City
Rapid City
Minnesota
Minneapolis (KMSP)
St. Paul (KSTP)
Waseca
St. Cloud
Rochester
Bemidj
Brainerd
Duluth