The Philosophy Behind the SnowBase Score
Most weather apps provide a single generic forecast. However, 12 inches of snow on a groomed trail in Wisconsin might be a 10/10 day for trail snowmobiling, while 12 inches of snow in a rugged Colorado mountain bowl is an unrideable 2/10 day with dangerous rock hazards.
The SnowBase Score is tailored to the physical requirements of each specific sport.
Core Input Parameters
- Settled Base Snow Depth (SNWD): Measured via SNOTEL ultrasonic sensors or NOAA GHCN daily logs.
- 24-Hour & 72-Hour Snowfall: Quantifies fresh powder coverage and softness.
- Ambient Temperature & Solar Load: Identifies freeze-thaw cycles, slush risk, or extreme subzero exposure.
- Wind Velocity & Gusts: Quantifies wind scouring, crust formation, and comfort.
- Precipitation Type: Liquid precipitation triggers immediate severe penalties.
Score Brackets (0.0 to 10.0)
- 8.5 – 10.0 (Prime): Exceptional base, fresh snow, subfreezing preservation.
- 6.5 – 8.4 (Good): Solid base and favorable riding/skiing.
- 4.5 – 6.4 (Fair): Rideable, with minor weather or base limitations.
- 2.5 – 4.4 (Marginal): Thin coverage, rocks exposed, or heavy freeze-thaw crust.
- 0.0 – 2.4 (Poor): Insufficient snow or active thaw.