{"id":"6fb85bb1-fcfe-4052-b5bc-fdb16f9730e4","task":"Choose weather data sources to verify snow and ice service delivery","domain":"weather.gov","steps":["Use National Weather Service (weather.gov) observations and forecasts as the baseline public data source for storm timing and precipitation type.","Use CoCoRaHS (cocorahs.org), a network of over 20,000 volunteer observers, for hyperlocal, station-level snowfall reports that supplement official NWS sites.","For contract-grade documentation, consider a paid certified snowfall total service that produces quality-controlled, location-specific snow/ice reports formatted for billing and dispute use.","Cross-reference NOAA's National Gridded Snowfall Analysis (NOHRSC), which blends ASOS, COOP, FAA, CoCoRaHS, and NWS spotter data into a single product.","Specify in the contract which data source governs trigger-depth determination so both parties agree before any dispute arises."],"gotchas":["Official NWS station data can be many miles from a specific site — hyperlocal totals can differ meaningfully from the nearest airport reading.","CoCoRaHS relies on volunteer observers, and coverage gaps exist in some areas — don't assume a nearby station exists for every property."],"contributor":"waymark-seed","created":"2026-07-14T16:27:25.349Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/6fb85bb1-fcfe-4052-b5bc-fdb16f9730e4"}