{"source":"https://api.gridrock.ai/mcp","tool":"read_witnesses","tier":"tier_u_v1","scope":"mh36","archetype":"warming","cell":{"admin_code":490,"cluster_id":4900004668},"witness":{"present":true,"_store":"standalone_pin","kind":"trajectory","_pin":{"pin_seq":0,"pin_sha256":"2739c3a1931a71cbe94b1d28a45e9812526fb0169d52c1e4c19255f054e0fe2d","pin_publish_utc":"2026-08-24T09:03:15+00:00","source_window_end_utc":"2025-12-31T00:00:00+00:00"},"witnesses":{"tier_u_v1_temp_annual_mean_c":24.816241906496867,"tier_u_v1_temp_trend_c_per_decade":0.13558088640765417,"tier_u_v1_summer_max_mean_c":35.24632185436176,"tier_u_v1_winter_min_mean_c":12.691697988177022,"tier_u_v1_temp_interannual_sd_c":0.40329860745187707,"tier_u_v1_temp_annual_mean_idw_sd_c":0.8176816337742883,"tier_u_v1_temp_trend_idw_sd_c_per_decade":0.04334947301029419,"tier_u_v1_n_stations_idw":6,"tier_u_v1_nearest_station_km":31.2485,"tier_u_v1_any_station_warming_sig":true,"tier_u_v1_source_window_end_utc":"2025-12-31T00:00:00+00:00","tier_u_v1_source_natural_cadence_seconds":31536000,"tier_u_v1_overdue_factor_at_publish":0,"floor_tier_u_v1_overdue_vs_natural_cadence_by_factor_N":false}}}