{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:53:38.918379", "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-Jun-17_to_2026-Jun-24_265.5_54.0"}, "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": 2026060000574}, "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": "June 17 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 24 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 82270.6397946235}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-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": ["Hudson Bay"]}, "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": 54.0}, "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": 265.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "265.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 264.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 269.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.25, 55.0], [-96.03, 55.53], [-95.68, 55.68], [-95.65, 55.75], [-95.75, 56.0], [-95.54, 56.5], [-95.75, 57.0], [-95.53, 57.53], [-95.0, 57.75], [-94.47, 57.53], [-94.25, 57.0], [-94.46, 56.5], [-94.32, 56.18], [-94.25, 56.15], [-94.0, 56.25], [-93.47, 56.03], [-93.25, 55.5], [-93.35, 55.25], [-93.32, 55.18], [-92.97, 55.03], [-92.75, 54.5], [-92.97, 53.97], [-93.32, 53.82], [-93.47, 53.47], [-94.0, 53.25], [-94.25, 53.35], [-94.5, 53.25], [-95.03, 53.47], [-95.18, 53.82], [-95.53, 53.97], [-95.68, 54.32], [-96.03, 54.47], [-96.25, 55.0]]]]}, "2026-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.25, 55.0], [-96.03, 55.53], [-95.68, 55.68], [-95.65, 55.75], [-95.75, 56.0], [-95.54, 56.5], [-95.75, 57.0], [-95.53, 57.53], [-95.0, 57.75], [-94.5, 57.54], [-94.0, 57.75], [-93.75, 57.65], [-93.5, 57.75], [-93.25, 57.65], [-93.0, 57.75], [-92.75, 57.65], [-92.5, 57.75], [-92.25, 57.65], [-92.0, 57.75], [-91.75, 57.65], [-91.5, 57.75], [-91.25, 57.65], [-91.0, 57.75], [-90.47, 57.53], [-90.25, 57.0], [-90.47, 56.47], [-91.0, 56.25], [-91.25, 56.35], [-91.32, 56.32], [-91.35, 56.25], [-91.25, 56.0], [-91.47, 55.47], [-91.82, 55.32], [-91.97, 54.97], [-92.5, 54.75], [-92.75, 54.85], [-92.82, 54.82], [-92.85, 54.75], [-92.75, 54.5], [-92.97, 53.97], [-93.32, 53.82], [-93.47, 53.47], [-94.0, 53.25], [-94.25, 53.35], [-94.5, 53.25], [-95.03, 53.47], [-95.18, 53.82], [-95.53, 53.97], [-95.68, 54.32], [-96.03, 54.47], [-96.25, 55.0]]]]}, "2026-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.03, 55.53], [-95.68, 55.68], [-95.65, 55.75], [-95.75, 56.0], [-95.54, 56.5], [-95.75, 57.0], [-95.53, 57.53], [-95.0, 57.75], [-94.5, 57.54], [-94.0, 57.75], [-93.75, 57.65], [-93.5, 57.75], [-93.25, 57.65], [-93.0, 57.75], [-92.75, 57.65], [-92.5, 57.75], [-92.25, 57.65], [-92.0, 57.75], [-91.75, 57.65], [-91.5, 57.75], [-91.25, 57.65], [-91.0, 57.75], [-90.47, 57.53], [-90.25, 57.0], [-90.47, 56.47], [-91.0, 56.25], [-91.25, 56.35], [-91.32, 56.32], [-91.35, 56.25], [-91.25, 56.0], [-91.47, 55.47], [-91.82, 55.32], [-91.97, 54.97], [-92.5, 54.75], [-92.75, 54.85], [-92.82, 54.82], [-92.85, 54.75], [-92.82, 54.68], [-92.47, 54.53], [-92.25, 54.0], [-92.35, 53.75], [-92.25, 53.5], [-92.47, 52.97], [-93.0, 52.75], [-93.25, 52.85], [-93.5, 52.75], [-93.75, 52.85], [-94.0, 52.75], [-94.25, 52.85], [-94.5, 52.75], [-95.03, 52.97], [-95.18, 53.32], [-95.25, 53.35], [-95.5, 53.25], [-96.03, 53.47], [-96.25, 54.0], [-96.04, 54.5], [-96.25, 55.0], [-96.03, 55.53]]]]}, "2026-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.03, 55.53], [-95.68, 55.68], [-95.65, 55.75], [-95.75, 56.0], [-95.53, 56.53], [-95.18, 56.68], [-95.03, 57.03], [-94.68, 57.18], [-94.53, 57.53], [-94.0, 57.75], [-93.75, 57.65], [-93.5, 57.75], [-93.25, 57.65], [-93.0, 57.75], [-92.75, 57.65], [-92.5, 57.75], [-92.25, 57.65], [-92.0, 57.75], [-91.75, 57.65], [-91.5, 57.75], [-91.25, 57.65], [-91.0, 57.75], [-90.47, 57.53], [-90.25, 57.0], [-90.47, 56.47], [-91.0, 56.25], [-91.25, 56.35], [-91.32, 56.32], [-91.35, 56.25], [-91.25, 56.0], [-91.47, 55.47], [-91.82, 55.32], [-91.97, 54.97], [-92.5, 54.75], [-92.75, 54.85], [-92.82, 54.82], [-92.85, 54.75], [-92.82, 54.68], [-92.47, 54.53], [-92.25, 54.0], [-92.35, 53.75], [-92.25, 53.5], [-92.47, 52.97], [-93.0, 52.75], [-93.25, 52.85], [-93.5, 52.75], [-93.75, 52.85], [-94.0, 52.75], [-94.25, 52.85], [-94.5, 52.75], [-95.03, 52.97], [-95.18, 53.32], [-95.25, 53.35], [-95.5, 53.25], [-96.03, 53.47], [-96.25, 54.0], [-96.04, 54.5], [-96.25, 55.0], [-96.03, 55.53]]]]}, "2026-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.25, 54.0], [-96.03, 54.53], [-95.5, 54.75], [-95.25, 54.65], [-95.0, 54.75], [-94.75, 54.65], [-94.5, 54.75], [-94.25, 54.65], [-94.0, 54.75], [-93.75, 54.65], [-93.5, 54.75], [-93.25, 54.65], [-93.0, 54.75], [-92.47, 54.53], [-92.25, 54.0], [-92.35, 53.75], [-92.25, 53.5], [-92.47, 52.97], [-93.0, 52.75], [-93.25, 52.85], [-93.5, 52.75], [-93.75, 52.85], [-94.0, 52.75], [-94.25, 52.85], [-94.5, 52.75], [-95.03, 52.97], [-95.18, 53.32], [-95.25, 53.35], [-95.5, 53.25], [-96.03, 53.47], [-96.25, 54.0]]], [[[-92.03, 56.47], [-92.25, 57.0], [-92.03, 57.53], [-91.5, 57.75], [-90.97, 57.53], [-90.75, 57.0], [-90.97, 56.47], [-91.5, 56.25], [-92.03, 56.47]]]]}, "2026-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.0, 58.25], [-91.47, 58.03], [-91.25, 57.5], [-91.47, 56.97], [-92.0, 56.75], [-92.53, 56.97], [-92.75, 57.5], [-92.53, 58.03], [-92.0, 58.25]]]]}, "2026-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.0, 58.25], [-91.47, 58.03], [-91.25, 57.5], [-91.47, 56.97], [-92.0, 56.75], [-92.53, 56.97], [-92.75, 57.5], [-92.53, 58.03], [-92.0, 58.25]]]]}, "2026-06-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.0, 58.25], [-91.47, 58.03], [-91.25, 57.5], [-91.47, 56.97], [-92.0, 56.75], [-92.53, 56.97], [-92.75, 57.5], [-92.53, 58.03], [-92.0, 58.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.531990658428526}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.998029926343601}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.213856252034532, 6.172266495018732, 6.364558985613485, 7.758256163420526, 9.369198446562848, 0.5510078430176009, -0.26916097005204165, 0.4323491414388059]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.775395965576195, 2.5245592753092865, 2.904120381673181, 2.8412223815918196, 3.5811642964681027, 0.5510078430176009, -0.26916097005204165, 0.4323491414388059]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.533989998454891, -7.368556457651202, -7.757346729229422, -6.660396270333716, -5.496071798137941, -3.1400526057755656, -4.069686437630651, -3.4514224622253664]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.67302798301148, -9.417377749949196, -9.531990658428526, -7.741505750974056, -6.390736404541599, -3.1400526057755656, -4.069686437630651, -3.4514224622253664]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5194902103018468, -1.5279235577182892, -1.6943303371797043, -1.5041260696962173, -1.3994224612320325, -1.140819007613039, -1.5091397035883432, -1.2855271257303167]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6427806533121183, -1.7843521264386184, -1.908229836276138, -1.7940916377700207, -1.508438222321839, -1.140819007613039, -1.5091397035883432, -1.2855271257303167]}}