The Dee Snowstorm Scale Category Description Average Snowfall Rates Average Snowfall Accumulation Minimum Visability Winds 1 A weak storm , with light snowfall rates and minimal accumulation.
Travel is only impaired slightly.
Final accumulation is greater than with a Cat. Travel is impaired more significantly, especially during the heavier snow bursts, but still not difficult. A significant storm , with moderate snowfall rates occurring through about half the storms duration. Travel at the onset of the storm is impacted and becomes difficult by the end of the storm. A significant storm , with moderate snowfall rates occurring through over half of the storm and a period of heavy snow also likely.