upslope / accuracy
The long game: every month's forecast accuracy, permanently. The 30-day view lives on the scoreboard.
In October 2026 so far, upslope’s day-before precipitation calls for New England ski resorts verified at a 92% event hit rate across 471 forecast/observation pairs (mean absolute error 0.05″). This table adds a row every month, forever — the point is to watch the numbers get better, in public.
Month by month
| Month | Precipitation | Snowfall | ||||||
|---|---|---|---|---|---|---|---|---|
| days | hit rate | avg miss | lean | days | hit rate | avg miss | lean | |
| October 2026 (partial) | 471 | 92% | 0.05″ | 0.0″ | — | — | — | — |
| September 2026 | 921 | 76% | 0.12″ | +0.01″ | — | — | — | — |
| August 2026 | 158 | 75% | 0.07″ | +0.05″ | — | — | — | — |
Day-before forecasts vs. the median of nearby CoCoRaHS gauges (min 2 reporting). Snowfall columns fill in when the season starts.
Scoring fix, Oct 8, 2026: earlier versions compared each gauge report (7am-to-7am) against the forecast for the wrong calendar day; all history was rescored under the corrected rule.