{"source":"https://api.gridrock.ai/mcp","tool":"read_witnesses","tier":"tier_u_v1","scope":"mh36","archetype":"warming","cell":{"admin_code":498,"cluster_id":4980004384},"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":26.777098397867125,"tier_u_v1_temp_trend_c_per_decade":0.10206178740508355,"tier_u_v1_summer_max_mean_c":38.974679632864266,"tier_u_v1_winter_min_mean_c":13.853480281412192,"tier_u_v1_temp_interannual_sd_c":0.44973872701965595,"tier_u_v1_temp_annual_mean_idw_sd_c":0.38548074350607564,"tier_u_v1_temp_trend_idw_sd_c_per_decade":0.04813489948480915,"tier_u_v1_n_stations_idw":6,"tier_u_v1_nearest_station_km":48.3567,"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}}}