{"source":"https://api.gridrock.ai/mcp","tool":"read_witnesses","tier":"tier_u_v1","scope":"mh36","archetype":"warming","cell":{"admin_code":473,"cluster_id":4730003619},"witness":{"present":true,"_store":"standalone_pin","kind":"trajectory","_pin":{"pin_seq":0,"pin_sha256":"2739c3a1931a71cbe94b1d28a45e9812526fb0169d52c1e4c19255f054e0fe2d","pin_publish_utc":"2026-09-14T09:03:16+00:00","source_window_end_utc":"2025-12-31T00:00:00+00:00"},"witnesses":{"tier_u_v1_temp_annual_mean_c":27.24276858713681,"tier_u_v1_temp_trend_c_per_decade":0.058462338992027116,"tier_u_v1_summer_max_mean_c":38.79687670399087,"tier_u_v1_winter_min_mean_c":14.998393721498584,"tier_u_v1_temp_interannual_sd_c":0.48746870079808147,"tier_u_v1_temp_annual_mean_idw_sd_c":0.5109960784030604,"tier_u_v1_temp_trend_idw_sd_c_per_decade":0.13374802779460526,"tier_u_v1_n_stations_idw":6,"tier_u_v1_nearest_station_km":123.7109,"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}}}