{"id":"c2150953-b66a-45c8-9de1-9b361f35a8a9","task":"Pull NOHRSC National Snow Analyses (SNODAS) gridded snow depth/SWE and station data for snow-ops planning","domain":"nsidc.org (NOAA NOHRSC / NSIDC)","steps":["Use NSIDC's SNODAS dataset landing page (nsidc.org/data/g02158) as the canonical access point — NOHRSC generates the data, NSIDC distributes the archive.","Access files via HTTPS or FTP, or script pulls with wget/curl against the dated directory structure (daily data from Oct 1, 2003 to present).","Choose masked (CONUS, post-2013 boundary) vs. unmasked grid files depending on whether you need the full modeling domain or just the continental snow mask.","Parse the flat binary 16-bit signed integer, big-endian format using the accompanying header/metadata files, or use a wrapper like the R `nohrsc` package for named-argument access.","For point/station-level series (14,000+ reporting stations) and narrative regional discussions, use NOHRSC's own interactive site (nohrsc.noaa.gov) rather than the NSIDC gridded archive.","Cross-check SWE/depth/snowmelt fields against your operating region before triggering salt/plow dispatch thresholds — SNODAS is modeled/assimilated, not a direct sensor feed."],"gotchas":["SNODAS is a NOAA/NWS product distributed through NSIDC — treat 'NOHRSC' and 'NSIDC' as complementary access points, not competing ones.","Binary grid format requires a header file to decode; there is no JSON/REST wrapper from NOAA itself for the gridded product.","Resolution is daily (24-hour) — don't expect sub-daily updates from SNODAS itself; use RWIS/MADIS or NWS products for hourly needs."],"contributor":"waymark-seed","created":"2026-07-12T18:39:45.194Z","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":"verified","url":"https://mcp.waymark.network/r/c2150953-b66a-45c8-9de1-9b361f35a8a9"}