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How the scores work

Every score is a number from 0 to 100 computed fresh each day from 16-day forecast data. There's no single "conditions" number — skiing styles have completely different ideal conditions, so we score each separately. Here's exactly what goes into each one.

❄️

Powder

Measures how good conditions are for finding fresh, untracked snow. Weighted heavily toward recent and incoming snowfall, with bonuses for cold temperatures that keep snow dry and light winds that leave it undisturbed.

Factor	Max pts	Ideal condition
New snow last 48h	40	16 cm (6"+) or more
Forecast snow next 24h	25	More incoming storm
Temperature	20	Below 20°F — dry, low-density snow
Wind speed	15	Below 15 mph — unblown powder

🎿

Carving

Measures how good conditions are for edge-to-edge runs on groomed hardpack. Prioritizes overnight freezing that firms up the surface and calm mornings before it softens. Penalizes rain and warm overnight temps that turn groomers to slush.

Factor	Max pts	Ideal condition
Overnight low temperature	30	20–28°F — firms groomed surface without icing
Morning temperature (7–11 AM)	25	22–30°F — hardpack but not bulletproof
Wind speed	20	Below 10 mph — undisturbed groomer surface
Precipitation type	15	No rain — temps stay below 33°F during precip
Snow recency	10	Light snow 1–3 days ago — settled base

Note: Temps below 15°F score lower (ice risk). Overnight temps above 32°F score 0 — the groomer went soft.

🔭

Visibility

Measures how clear the mountain is. Rewards bluebird days with low cloud cover and calm winds. Penalizes active storms, heavy snowfall (even if good for powder), high winds, and low-visibility fog conditions.

Factor	Max pts	Ideal condition
Cloud cover	40	Below 20% — full bluebird
Precipitation intensity	30	No precipitation
Wind speed	20	Below 10 mph — no blowing snow
Weather code	10	Clear sky or partly cloudy code

🛹

Park

Measures how good conditions are for jumps, rails, and jibs. Derived from a weighted blend of the other scores — parks need a reasonable surface (not icy, not slushy) plus recent snow for feature coverage.

Factor	Max pts	Ideal condition
Carving score (surface quality)	40	Firm but not icy
Powder score (feature coverage)	30	Recent snow fills in features
Visibility score (conditions)	30	Clear enough to see landings

Note: Park score = (carving × 0.4) + (powder × 0.3) + (visibility × 0.3), with a 15% discount applied — park conditions are rarely as clean as a pure powder or carving day.

Data sources

Weather forecasts — 16-day hourly and daily forecast from Open-Meteo (CC BY 4.0), using summit coordinates and elevation where available.
Snow depth — Current base depth from NOAA SNODAS (National Snow and Ice Data Center).
Resort data — 813 North American ski resorts from OpenSkiMap contributors (ODbL).

Update cadence

Scores for every active resort are recomputed hourly. A nightly job at 3 AM UTC pre-warms all 813 resorts so the first morning load is instant. Scores shown in the app reflect conditions as of the last cache refresh — typically within the hour.