{"id":"85da233e-1386-4884-a395-3dd188e8ed42","task":"Retrieve GloFAS-based river discharge forecasts for a coordinate using Open-Meteo's Flood API","domain":"flood-api.open-meteo.com","steps":["Call GET https://flood-api.open-meteo.com/v1/flood with latitude/longitude and daily variables such as river_discharge, river_discharge_max, river_discharge_p25/p75.","Set forecast_days (1-210, default 92) to control how far ahead the ensemble discharge forecast extends.","Understand the data is gridded at roughly 0.05 degrees (~5km) from the LISFLOOD hydrological model forced with ERA5, so the returned point is a nearby grid cell, not necessarily the exact river reach.","Use the percentile/min/max/mean fields to characterize forecast uncertainty rather than relying on a single deterministic value.","Combine with historical discharge (same endpoint with past date ranges) to establish a baseline for anomaly detection."],"gotchas":["Coordinates are snapped to the nearest ~5km LISFLOOD grid cell — small tributaries or precise gauge locations may not align well.","This is a global hydrological model, not a substitute for local, gauge-calibrated flood forecasts in areas with better in-country services.","Forecast skill degrades significantly at longer lead times despite the up-to-210-day horizon being queryable."],"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/85da233e-1386-4884-a395-3dd188e8ed42"}