{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:53:31.226192", "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-31_to_2026-Jun-03_246.5_51.5"}, "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": 2026050000809}, "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 31 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 03 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": 125140.67128652177}, "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", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.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": []}, "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": 51.5}, "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": 246.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "246.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 244.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 249.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 53.03], [-115.5, 53.25], [-115.25, 53.15], [-115.0, 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54.65], [-114.5, 54.75], [-114.25, 54.65], [-114.0, 54.75], [-113.47, 54.53], [-113.32, 54.18], [-112.97, 54.03], [-112.82, 53.68], [-112.47, 53.53], [-112.32, 53.18], [-111.97, 53.03], [-111.82, 52.68], [-111.47, 52.53], [-111.25, 52.0], [-111.35, 51.75], [-111.32, 51.68], [-110.97, 51.53], [-110.75, 51.0], [-110.85, 50.75], [-110.82, 50.68], [-110.47, 50.53], [-110.25, 50.0], [-110.35, 49.75], [-110.25, 49.5], [-110.47, 48.97], [-111.0, 48.75], [-111.25, 48.85], [-111.32, 48.82], [-111.35, 48.75], [-111.25, 48.5], [-111.47, 47.97], [-112.0, 47.75], [-112.53, 47.97], [-112.68, 48.32], [-112.75, 48.35], [-113.0, 48.25], [-113.53, 48.47], [-113.68, 48.82], [-114.03, 48.97], [-114.25, 49.5], [-114.15, 49.75], [-114.18, 49.82], [-114.53, 49.97], [-114.68, 50.32], [-115.03, 50.47], [-115.18, 50.82], [-115.53, 50.97], [-115.68, 51.32], [-116.03, 51.47], [-116.25, 52.0], [-116.15, 52.25], [-116.25, 52.5], [-116.04, 53.0]]]]}, "2026-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.04, 53.0], [-116.25, 53.5], [-116.15, 53.75], [-116.25, 54.0], [-116.03, 54.53], [-115.5, 54.75], [-115.25, 54.65], [-115.0, 54.75], [-114.75, 54.65], [-114.5, 54.75], [-114.25, 54.65], [-114.0, 54.75], [-113.47, 54.53], [-113.32, 54.18], [-112.97, 54.03], [-112.82, 53.68], [-112.47, 53.53], [-112.32, 53.18], [-111.97, 53.03], [-111.82, 52.68], [-111.47, 52.53], [-111.25, 52.0], [-111.35, 51.75], [-111.32, 51.68], [-110.97, 51.53], [-110.75, 51.0], [-110.85, 50.75], [-110.82, 50.68], [-110.47, 50.53], [-110.25, 50.0], [-110.35, 49.75], [-110.25, 49.5], [-110.47, 48.97], [-111.0, 48.75], [-111.25, 48.85], [-111.32, 48.82], [-111.35, 48.75], [-111.25, 48.5], [-111.47, 47.97], [-112.0, 47.75], [-112.53, 47.97], [-112.68, 48.32], [-112.75, 48.35], [-113.0, 48.25], [-113.53, 48.47], [-113.68, 48.82], [-114.03, 48.97], [-114.25, 49.5], [-114.15, 49.75], [-114.18, 49.82], [-114.53, 49.97], [-114.68, 50.32], [-115.03, 50.47], [-115.18, 50.82], [-115.53, 50.97], 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52.32], [-114.75, 52.35], [-115.0, 52.25], [-115.53, 52.47], [-115.68, 52.82], [-116.03, 52.97], [-116.25, 53.5], [-116.15, 53.75], [-116.25, 54.0], [-116.03, 54.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.797230632588253}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.236871769507493}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.979921141124919, 6.984659908979381, 8.26873098520133, 9.97341602032003]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.365936533610068, 2.6721486409505246, 3.7792653401692746, 8.97254587809249]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.4632640690298615, 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