{"source":"https://api.gridrock.ai/mcp","tool":"read_witnesses","tier":"tier_u_v1","scope":"mh36","archetype":"warming","cell":{"admin_code":492,"cluster_id":4920004103},"witness":{"present":true,"_store":"standalone_pin","kind":"trajectory","_pin":{"pin_seq":0,"pin_sha256":"fd412a84302331e8ab9ecee85c26003f1b2164fd48494b40fd473a1e628a8a39","pin_publish_utc":"2026-09-28T09:03:00+00:00","source_window_end_utc":"2025-12-31T00:00:00+00:00"},"witnesses":{"tier_u_v1_temp_annual_mean_c":26.60689359601873,"tier_u_v1_temp_trend_c_per_decade":0.11825170668812564,"tier_u_v1_summer_max_mean_c":32.59025315092252,"tier_u_v1_winter_min_mean_c":18.499117891621715,"tier_u_v1_temp_interannual_sd_c":0.3626429110294112,"tier_u_v1_temp_annual_mean_idw_sd_c":0.9214516524333306,"tier_u_v1_temp_trend_idw_sd_c_per_decade":0.049435444751611865,"tier_u_v1_n_stations_idw":6,"tier_u_v1_nearest_station_km":48.9379,"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}}}