{"source":"https://api.gridrock.ai/mcp","tool":"read_witnesses","tier":"tier_u_v1","scope":"mh36","archetype":"warming","cell":{"admin_code":489,"cluster_id":4890002196},"witness":{"present":true,"_store":"standalone_pin","kind":"trajectory","_pin":{"pin_seq":0,"pin_sha256":"2739c3a1931a71cbe94b1d28a45e9812526fb0169d52c1e4c19255f054e0fe2d","pin_publish_utc":"2026-07-27T09:03:06+00:00","source_window_end_utc":"2025-12-31T00:00:00+00:00"},"witnesses":{"tier_u_v1_temp_annual_mean_c":27.04909022332929,"tier_u_v1_temp_trend_c_per_decade":0.12877421377557993,"tier_u_v1_summer_max_mean_c":38.09745866059796,"tier_u_v1_winter_min_mean_c":15.075443118733597,"tier_u_v1_temp_interannual_sd_c":0.5333276370873595,"tier_u_v1_temp_annual_mean_idw_sd_c":0.678483226299401,"tier_u_v1_temp_trend_idw_sd_c_per_decade":0.115989411827944,"tier_u_v1_n_stations_idw":6,"tier_u_v1_nearest_station_km":168.931,"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}}}