{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:27.379998", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2026-Apr-05_to_2026-Apr-08_258.5_26.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2026040000192}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "April 05 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 08 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 91627.92582945347}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 26.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 258.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 257.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.25, 26.0], [-103.03, 26.53], [-102.68, 26.68], [-102.65, 26.75], [-102.75, 27.0], [-102.53, 27.53], [-102.0, 27.75], [-101.5, 27.54], [-101.0, 27.75], [-100.75, 27.65], [-100.5, 27.75], [-100.25, 27.65], [-100.0, 27.75], [-99.75, 27.65], [-99.5, 27.75], [-99.25, 27.65], [-99.0, 27.75], [-98.47, 27.53], [-98.32, 27.18], [-97.97, 27.03], [-97.75, 26.5], [-97.85, 26.25], [-97.75, 26.0], [-97.97, 25.47], [-98.32, 25.32], [-98.35, 25.25], [-98.25, 25.0], [-98.35, 24.75], [-98.25, 24.5], [-98.47, 23.97], [-99.0, 23.75], [-99.25, 23.85], [-99.5, 23.75], [-100.03, 23.97], [-100.25, 24.5], [-100.15, 24.75], [-100.18, 24.82], [-100.5, 24.96], [-101.0, 24.75], [-101.25, 24.85], [-101.5, 24.75], [-101.75, 24.85], [-102.0, 24.75], [-102.53, 24.97], [-102.68, 25.32], [-103.03, 25.47], [-103.25, 26.0]]]]}, "2026-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.25, 26.0], [-103.03, 26.53], [-102.68, 26.68], [-102.65, 26.75], [-102.75, 27.0], [-102.53, 27.53], [-102.0, 27.75], [-101.5, 27.54], [-101.0, 27.75], [-100.75, 27.65], [-100.5, 27.75], [-100.25, 27.65], [-100.0, 27.75], [-99.75, 27.65], [-99.5, 27.75], [-99.25, 27.65], [-99.0, 27.75], [-98.47, 27.53], [-98.32, 27.18], [-97.97, 27.03], [-97.75, 26.5], [-97.85, 26.25], [-97.75, 26.0], [-97.97, 25.47], [-98.32, 25.32], [-98.35, 25.25], [-98.25, 25.0], [-98.35, 24.75], [-98.25, 24.5], [-98.47, 23.97], [-99.0, 23.75], [-99.25, 23.85], [-99.5, 23.75], [-100.03, 23.97], [-100.25, 24.5], [-100.15, 24.75], [-100.18, 24.82], [-100.5, 24.96], [-101.0, 24.75], [-101.25, 24.85], [-101.5, 24.75], [-101.75, 24.85], [-102.0, 24.75], [-102.53, 24.97], [-102.68, 25.32], [-103.03, 25.47], [-103.25, 26.0]]]]}, "2026-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.25, 26.0], [-103.03, 26.53], [-102.68, 26.68], [-102.65, 26.75], [-102.75, 27.0], [-102.53, 27.53], [-102.0, 27.75], [-101.5, 27.54], [-101.0, 27.75], [-100.75, 27.65], [-100.5, 27.75], [-100.25, 27.65], [-100.0, 27.75], [-99.75, 27.65], [-99.5, 27.75], [-99.25, 27.65], [-99.0, 27.75], [-98.47, 27.53], [-98.32, 27.18], [-97.97, 27.03], [-97.75, 26.5], [-97.85, 26.25], [-97.75, 26.0], [-97.97, 25.47], [-98.32, 25.32], [-98.35, 25.25], [-98.25, 25.0], [-98.35, 24.75], [-98.25, 24.5], [-98.47, 23.97], [-99.0, 23.75], [-99.25, 23.85], [-99.5, 23.75], [-100.03, 23.97], [-100.25, 24.5], [-100.15, 24.75], [-100.18, 24.82], [-100.5, 24.96], [-101.0, 24.75], [-101.25, 24.85], [-101.5, 24.75], [-101.75, 24.85], [-102.0, 24.75], [-102.53, 24.97], [-102.68, 25.32], [-103.03, 25.47], [-103.25, 26.0]]]]}, "2026-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.03, 25.47], [-102.25, 26.0], [-102.03, 26.53], [-101.5, 26.75], [-101.25, 26.65], [-101.0, 26.75], [-100.47, 26.53], [-100.25, 26.0], [-100.47, 25.47], [-101.0, 25.25], [-101.25, 25.35], [-101.5, 25.25], [-102.03, 25.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.987759093579939}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.570615069353794}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.4188884619511, 14.604822894780341, 17.608988736855906, 16.24726257324221]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.731270090738974, 9.855469004313193, 13.580384826660179, 15.387602742513025]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.305701648472976, -8.183431808977947, -5.305350337780479, -5.207078381048433]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.209256724316504, -9.987759093579939, -6.64851785663501, -5.345843392103632]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.668869958527765, -2.160496565214083, -1.3790167207357757, -1.3313391790224762]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.003226666700577, -2.6700184619431475, -1.7209571970543276, -1.3406868370262]}}