{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:53:27.417271", "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-18_to_2026-May-20_260.5_44.0"}, "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": 2026050000485}, "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 18 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 20 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": 157355.9521722479}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.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": 44.0}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\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": 263.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.25, 42.0], [-103.03, 42.53], [-102.5, 42.75], [-102.25, 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[-99.5, 39.75], [-99.75, 39.85], [-100.0, 39.75], [-100.25, 39.85], [-100.5, 39.75], [-101.03, 39.97], [-101.2, 40.38], [-101.5, 40.25], [-102.03, 40.47], [-102.18, 40.82], [-102.53, 40.97], [-102.68, 41.32], [-103.03, 41.47], [-103.25, 42.0]]]]}, "2026-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.25, 42.0], [-103.03, 42.53], [-102.5, 42.75], [-102.25, 42.65], [-102.0, 42.75], [-101.75, 42.65], [-101.5, 42.75], [-101.07, 42.57], [-101.25, 43.0], [-101.15, 43.25], [-101.25, 43.5], [-101.15, 43.75], [-101.25, 44.0], [-101.03, 44.53], [-100.62, 44.7], [-100.75, 45.0], [-100.53, 45.53], [-100.0, 45.75], [-99.75, 45.65], [-99.68, 45.68], [-99.53, 46.03], [-99.0, 46.25], [-98.75, 46.15], [-98.68, 46.18], [-98.65, 46.25], [-98.75, 46.5], [-98.65, 46.75], [-98.75, 47.0], [-98.53, 47.53], [-98.0, 47.75], [-97.75, 47.65], [-97.5, 47.75], [-97.25, 47.65], [-97.0, 47.75], [-96.47, 47.53], [-96.25, 47.0], [-96.35, 46.75], [-96.25, 46.5], [-96.47, 45.97], [-96.82, 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