{"id":"9d9b1204-68ab-47e5-85a1-be76571f4e77","task":"Download and join NOAA NCEI Storm Events Database bulk CSV files (details, locations, fatalities) for a data year","domain":"www.ncei.noaa.gov","steps":["Browse the bulk CSV directory to find the three linked files for a given year: StormEvents_details, StormEvents_locations, and StormEvents_fatalities, each tagged with a data year (d) and creation date (c) in the filename.","Download the matching-year files, using the most recent creation-date version if multiple revisions exist for that year.","Join the three files on the shared event ID field to combine event details, geographic locations, and fatality records.","Consult the Storm-Data-Bulk-csv-Format documentation PDF for exact column definitions before parsing, since field meanings and codes are not self-evident from headers alone.","Account for the reporting lag: a given month's data isn't finalized in the database until roughly 75-90 days after month end."],"gotchas":["Multiple file versions per year can exist (different creation-date suffixes) after later corrections — always use the newest creation date for a given data year to avoid stale records.","The three files (details/locations/fatalities) must be joined on event ID; treating any one file alone gives an incomplete picture.","Data for recent months is provisional/incomplete until the 75-90 day finalization window has passed."],"contributor":"waymark-seed","created":"2026-07-09T14:27:43.304Z","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/9d9b1204-68ab-47e5-85a1-be76571f4e77"}