{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:10.863337", "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": "2025-Jul-15_to_2025-Jul-18_249.0_48.0"}, "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": 2025070000614}, "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": "July 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 18 2025"}, "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": 145350.50580727027}, "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": ["C.North-America", "N.E.North-America", "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": 48.0}, "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": 249.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 247.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 257.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.53, 47.47], [-112.75, 48.0], [-112.53, 48.53], [-112.0, 48.75], [-111.75, 48.65], [-111.68, 48.68], [-111.53, 49.03], [-111.0, 49.25], [-110.75, 49.15], [-110.5, 49.25], [-109.97, 49.03], [-109.82, 48.68], [-109.75, 48.65], [-109.5, 48.75], [-109.25, 48.65], [-109.18, 48.68], [-109.03, 49.03], [-108.5, 49.25], [-108.25, 49.15], [-108.18, 49.18], [-108.03, 49.53], [-107.68, 49.68], [-107.53, 50.03], [-107.0, 50.25], [-106.75, 50.15], [-106.5, 50.25], [-106.25, 50.15], [-106.18, 50.18], [-106.15, 50.25], [-106.25, 50.5], [-106.03, 51.03], [-105.5, 51.25], [-105.25, 51.15], [-105.0, 51.25], [-104.75, 51.15], [-104.68, 51.18], [-104.53, 51.53], [-104.0, 51.75], [-103.47, 51.53], [-103.32, 51.18], [-103.25, 51.15], [-103.0, 51.25], [-102.47, 51.03], [-102.25, 50.5], [-102.47, 49.97], [-102.82, 49.82], [-102.85, 49.75], [-102.75, 49.5], [-102.97, 48.97], [-103.32, 48.82], [-103.47, 48.47], [-103.82, 48.32], [-103.85, 48.25], [-103.75, 48.0], [-103.97, 47.47], [-104.5, 47.25], [-104.75, 47.35], [-104.82, 47.32], [-104.97, 46.97], [-105.5, 46.75], [-105.75, 46.85], [-106.0, 46.75], [-106.25, 46.85], [-106.5, 46.75], [-106.75, 46.85], [-107.0, 46.75], [-107.25, 46.85], [-107.32, 46.82], [-107.47, 46.47], [-107.82, 46.32], [-107.96, 46.0], [-107.75, 45.5], [-107.97, 44.97], [-108.5, 44.75], [-108.75, 44.85], [-109.0, 44.75], [-109.53, 44.97], [-109.75, 45.5], [-109.65, 45.75], [-109.75, 46.0], [-109.65, 46.25], [-109.75, 46.5], [-109.65, 46.75], [-109.75, 47.0], [-109.65, 47.25], [-109.68, 47.32], [-109.75, 47.35], [-110.0, 47.25], [-110.25, 47.35], [-110.5, 47.25], [-110.75, 47.35], [-111.0, 47.25], [-111.25, 47.35], [-111.5, 47.25], [-111.75, 47.35], [-112.0, 47.25], [-112.53, 47.47]]]]}, "2025-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.53, 47.47], [-112.75, 48.0], [-112.53, 48.53], [-112.0, 48.75], [-111.75, 48.65], [-111.68, 48.68], [-111.53, 49.03], [-111.0, 49.25], [-110.75, 49.15], [-110.5, 49.25], [-109.97, 49.03], [-109.82, 48.68], [-109.75, 48.65], [-109.5, 48.75], [-109.25, 48.65], [-109.18, 48.68], [-109.03, 49.03], [-108.5, 49.25], [-108.25, 49.15], [-108.18, 49.18], [-108.03, 49.53], [-107.68, 49.68], [-107.53, 50.03], [-107.0, 50.25], [-106.75, 50.15], [-106.5, 50.25], [-106.25, 50.15], [-106.18, 50.18], [-106.15, 50.25], [-106.25, 50.5], [-106.03, 51.03], [-105.5, 51.25], [-105.25, 51.15], [-105.0, 51.25], [-104.75, 51.15], [-104.68, 51.18], [-104.53, 51.53], [-104.0, 51.75], [-103.47, 51.53], [-103.32, 51.18], [-103.25, 51.15], [-103.0, 51.25], [-102.47, 51.03], [-102.25, 50.5], [-102.47, 49.97], [-102.82, 49.82], [-102.85, 49.75], [-102.75, 49.5], [-102.97, 48.97], [-103.32, 48.82], [-103.47, 48.47], [-103.82, 48.32], [-103.85, 48.25], [-103.75, 48.0], [-103.97, 47.47], [-104.5, 47.25], [-104.75, 47.35], [-104.82, 47.32], [-104.97, 46.97], [-105.5, 46.75], [-105.75, 46.85], [-106.0, 46.75], [-106.25, 46.85], [-106.5, 46.75], [-106.75, 46.85], [-107.0, 46.75], [-107.25, 46.85], [-107.32, 46.82], [-107.47, 46.47], [-107.82, 46.32], [-107.96, 46.0], [-107.75, 45.5], [-107.97, 44.97], [-108.5, 44.75], [-108.75, 44.85], [-109.0, 44.75], [-109.53, 44.97], [-109.75, 45.5], [-109.65, 45.75], [-109.75, 46.0], [-109.65, 46.25], [-109.75, 46.5], [-109.65, 46.75], [-109.75, 47.0], [-109.65, 47.25], [-109.68, 47.32], [-109.75, 47.35], [-110.0, 47.25], [-110.25, 47.35], [-110.5, 47.25], [-110.75, 47.35], [-111.0, 47.25], [-111.25, 47.35], [-111.5, 47.25], [-111.75, 47.35], [-112.0, 47.25], [-112.53, 47.47]]]]}, "2025-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.53, 47.47], [-112.75, 48.0], [-112.53, 48.53], [-112.0, 48.75], [-111.75, 48.65], [-111.68, 48.68], [-111.53, 49.03], [-111.0, 49.25], [-110.75, 49.15], [-110.5, 49.25], [-109.97, 49.03], [-109.82, 48.68], [-109.75, 48.65], [-109.5, 48.75], [-109.25, 48.65], [-109.18, 48.68], [-109.03, 49.03], [-108.5, 49.25], [-108.25, 49.15], [-108.18, 49.18], [-108.03, 49.53], [-107.68, 49.68], [-107.53, 50.03], [-107.0, 50.25], [-106.75, 50.15], [-106.5, 50.25], [-106.25, 50.15], [-106.18, 50.18], [-106.15, 50.25], [-106.25, 50.5], [-106.03, 51.03], [-105.5, 51.25], [-105.25, 51.15], [-105.0, 51.25], [-104.75, 51.15], [-104.68, 51.18], [-104.53, 51.53], [-104.0, 51.75], [-103.47, 51.53], [-103.32, 51.18], [-103.25, 51.15], [-103.0, 51.25], [-102.47, 51.03], [-102.25, 50.5], [-102.47, 49.97], [-102.82, 49.82], [-102.85, 49.75], [-102.75, 49.5], [-102.97, 48.97], [-103.32, 48.82], [-103.47, 48.47], [-103.82, 48.32], [-103.85, 48.25], [-103.75, 48.0], [-103.97, 47.47], [-104.5, 47.25], [-104.75, 47.35], [-104.82, 47.32], [-104.97, 46.97], [-105.5, 46.75], [-105.75, 46.85], [-106.0, 46.75], [-106.25, 46.85], [-106.5, 46.75], [-106.75, 46.85], [-107.0, 46.75], [-107.25, 46.85], [-107.32, 46.82], [-107.47, 46.47], [-107.82, 46.32], [-107.96, 46.0], [-107.75, 45.5], [-107.97, 44.97], [-108.5, 44.75], [-108.75, 44.85], [-109.0, 44.75], [-109.53, 44.97], [-109.75, 45.5], [-109.65, 45.75], [-109.75, 46.0], [-109.65, 46.25], [-109.75, 46.5], [-109.65, 46.75], [-109.75, 47.0], [-109.65, 47.25], [-109.68, 47.32], [-109.75, 47.35], [-110.0, 47.25], [-110.25, 47.35], [-110.5, 47.25], [-110.75, 47.35], [-111.0, 47.25], [-111.25, 47.35], [-111.5, 47.25], [-111.75, 47.35], [-112.0, 47.25], [-112.53, 47.47]]]]}, "2025-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.03, 48.53], [-107.5, 48.75], [-107.25, 48.65], [-107.0, 48.75], [-106.75, 48.65], [-106.5, 48.75], [-106.25, 48.65], [-106.0, 48.75], [-105.75, 48.65], [-105.5, 48.75], [-104.97, 48.53], [-104.75, 48.0], [-104.97, 47.47], [-105.5, 47.25], [-105.75, 47.35], [-105.82, 47.32], [-105.97, 46.97], [-106.5, 46.75], [-106.75, 46.85], [-107.0, 46.75], [-107.53, 46.97], [-107.68, 47.32], [-108.03, 47.47], [-108.25, 48.0], [-108.03, 48.53]]], [[[-110.75, 49.15], [-110.5, 49.25], [-109.97, 49.03], [-109.82, 48.68], [-109.47, 48.53], [-109.25, 48.0], [-109.47, 47.47], [-110.0, 47.25], [-110.25, 47.35], [-110.5, 47.25], [-110.75, 47.35], [-111.0, 47.25], [-111.25, 47.35], [-111.5, 47.25], [-112.03, 47.47], [-112.25, 48.0], [-112.03, 48.53], [-111.68, 48.68], [-111.53, 49.03], [-111.0, 49.25], [-110.75, 49.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.179848980584154}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.679266798380192}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.41481772409361, 14.250448794655938, 15.583758738343192, 17.47209672194259]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.211340840657556, 11.489261881510458, 13.857886250813806, 15.79182078043624]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.259301196927008, -6.530466525914784, -5.328878694038424, -5.237723141186769]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.576695940985815, -10.179848980584154, -7.451261796958477, -5.997457466510525]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5425405496323892, -1.8794373498447479, -1.5434371573047831, -1.404254848237619]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1602674185102146, -2.970276021948807, -2.1613995211870747, -1.602358157073113]}}