{"source":"https://api.gridrock.ai/mcp","tool":"read_witnesses","tier":"tier_u_v1","scope":"mh36","archetype":"warming","cell":{"admin_code":490,"cluster_id":4900001863},"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":25.755768197067756,"tier_u_v1_temp_trend_c_per_decade":0.14796384013700414,"tier_u_v1_summer_max_mean_c":35.30708801383214,"tier_u_v1_winter_min_mean_c":14.634338689287409,"tier_u_v1_temp_interannual_sd_c":0.45900256887774915,"tier_u_v1_temp_annual_mean_idw_sd_c":1.4037965737553972,"tier_u_v1_temp_trend_idw_sd_c_per_decade":0.07192686851910361,"tier_u_v1_n_stations_idw":6,"tier_u_v1_nearest_station_km":92.8674,"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}}}