{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:32.320676", "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-May-01_to_2026-May-03_254.5_32.0"}, "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": 2026050000056}, "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": "May 01 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 91662.64671572199}, "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": ["C.North-America", "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": 32.0}, "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": 254.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "254.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 251.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 256.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 32.53], [-108.18, 32.68], [-108.03, 33.03], [-107.5, 33.25], [-107.25, 33.15], [-107.18, 33.18], [-107.03, 33.53], [-106.68, 33.68], [-106.53, 34.03], [-106.0, 34.25], [-105.75, 34.15], [-105.5, 34.25], [-105.25, 34.15], [-105.18, 34.18], [-105.03, 34.53], [-104.5, 34.75], [-103.97, 34.53], [-103.75, 34.0], [-103.85, 33.75], [-103.75, 33.5], [-103.85, 33.25], [-103.75, 33.0], [-103.85, 32.75], [-103.82, 32.68], [-103.47, 32.53], [-103.25, 32.0], [-103.35, 31.75], [-103.25, 31.5], [-103.47, 30.97], [-103.87, 30.8], [-103.75, 30.5], [-103.97, 29.97], [-104.32, 29.82], [-104.47, 29.47], [-105.0, 29.25], [-105.25, 29.35], [-105.5, 29.25], [-106.03, 29.47], [-106.25, 30.0], [-106.15, 30.25], [-106.25, 30.5], [-106.04, 31.0], [-106.18, 31.32], [-106.25, 31.35], [-106.5, 31.25], [-106.75, 31.35], [-106.82, 31.32], [-106.97, 30.97], [-107.5, 30.75], [-107.75, 30.85], [-108.0, 30.75], [-108.53, 30.97], [-108.75, 31.5], [-108.65, 31.75], [-108.75, 32.0], [-108.53, 32.53]]]]}, "2026-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 32.53], [-108.18, 32.68], [-108.03, 33.03], [-107.5, 33.25], [-107.25, 33.15], [-107.18, 33.18], [-107.03, 33.53], [-106.68, 33.68], [-106.53, 34.03], [-106.0, 34.25], [-105.75, 34.15], [-105.5, 34.25], [-105.25, 34.15], [-105.18, 34.18], [-105.03, 34.53], [-104.5, 34.75], [-103.97, 34.53], [-103.75, 34.0], [-103.85, 33.75], [-103.75, 33.5], [-103.85, 33.25], [-103.75, 33.0], [-103.85, 32.75], [-103.82, 32.68], [-103.47, 32.53], [-103.25, 32.0], [-103.35, 31.75], [-103.25, 31.5], [-103.47, 30.97], [-103.87, 30.8], [-103.75, 30.5], [-103.97, 29.97], [-104.32, 29.82], [-104.47, 29.47], [-105.0, 29.25], [-105.25, 29.35], [-105.5, 29.25], [-106.03, 29.47], [-106.25, 30.0], [-106.15, 30.25], [-106.25, 30.5], [-106.04, 31.0], [-106.18, 31.32], [-106.25, 31.35], [-106.5, 31.25], [-106.75, 31.35], [-106.82, 31.32], [-106.97, 30.97], [-107.5, 30.75], [-107.75, 30.85], [-108.0, 30.75], [-108.53, 30.97], [-108.75, 31.5], [-108.65, 31.75], [-108.75, 32.0], [-108.53, 32.53]]]]}, "2026-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 32.53], [-108.18, 32.68], [-108.03, 33.03], [-107.5, 33.25], [-107.25, 33.15], [-107.18, 33.18], [-107.03, 33.53], [-106.68, 33.68], [-106.53, 34.03], [-106.0, 34.25], [-105.75, 34.15], [-105.5, 34.25], [-105.25, 34.15], [-105.18, 34.18], [-105.03, 34.53], [-104.5, 34.75], [-103.97, 34.53], [-103.75, 34.0], [-103.85, 33.75], [-103.75, 33.5], [-103.85, 33.25], [-103.75, 33.0], [-103.85, 32.75], [-103.82, 32.68], [-103.47, 32.53], [-103.25, 32.0], [-103.35, 31.75], [-103.25, 31.5], [-103.47, 30.97], [-103.87, 30.8], [-103.75, 30.5], [-103.97, 29.97], [-104.32, 29.82], [-104.47, 29.47], [-105.0, 29.25], [-105.25, 29.35], [-105.5, 29.25], [-106.03, 29.47], [-106.25, 30.0], [-106.15, 30.25], [-106.25, 30.5], [-106.04, 31.0], [-106.18, 31.32], [-106.25, 31.35], [-106.5, 31.25], [-106.75, 31.35], [-106.82, 31.32], [-106.97, 30.97], [-107.5, 30.75], [-107.75, 30.85], [-108.0, 30.75], [-108.53, 30.97], [-108.75, 31.5], [-108.65, 31.75], [-108.75, 32.0], [-108.53, 32.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.311960259081161}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.489318665375959}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.372983769008158, 12.347100721086804, 15.180200195312466]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.639669036865257, 6.1431200663249115, 8.845646158854208]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.935293187059639, -8.113523528128487, -5.419139280939748]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.788065714753941, -9.311960259081161, -6.096336135272679]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6458767286351577, -2.2632515000828732, -1.5027343072808943]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9183145436700284, -2.5414385411884686, -1.7683523329650666]}}