{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:42.195094", "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": "2024-Nov-30_to_2024-Dec-06_279.0_25.0"}, "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": 2024110000654}, "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": "November 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 06 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 217080.50178032354}, "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": ["Caribbean", "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": ["Gulf of Mexico", "North Atlantic Ocean"]}, "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": 25.0}, "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": 279.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "279.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 274.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 279.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.53, 31.03], [-85.18, 31.18], [-85.03, 31.53], [-84.68, 31.68], [-84.53, 32.03], [-84.0, 32.25], [-83.75, 32.15], [-83.5, 32.25], [-83.25, 32.15], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.18, 32.18], [-82.15, 32.25], [-82.25, 32.5], [-82.15, 32.75], [-82.25, 33.0], [-82.03, 33.53], [-81.5, 33.75], [-80.97, 33.53], [-80.82, 33.18], [-80.47, 33.03], [-80.25, 32.5], [-80.47, 31.97], [-80.82, 31.82], [-80.85, 31.75], [-80.75, 31.5], [-80.85, 31.25], [-80.75, 31.0], [-80.85, 30.75], [-80.75, 30.5], [-80.85, 30.25], [-80.75, 30.0], [-80.85, 29.75], [-80.75, 29.5], [-80.97, 28.97], [-81.5, 28.75], [-81.75, 28.85], [-81.82, 28.82], [-81.97, 28.47], [-82.5, 28.25], [-83.03, 28.47], [-83.18, 28.82], [-83.53, 28.97], [-83.68, 29.32], [-84.03, 29.47], [-84.18, 29.82], [-84.3, 29.88], [-84.47, 29.47], [-85.0, 29.25], [-85.53, 29.47], [-85.75, 30.0], [-85.65, 30.25], [-85.75, 30.5], [-85.53, 31.03]]]]}, "2024-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.25, 30.5], [-86.03, 31.03], [-85.5, 31.25], [-85.25, 31.15], [-85.18, 31.18], [-85.03, 31.53], [-84.68, 31.68], [-84.53, 32.03], [-84.0, 32.25], [-83.75, 32.15], [-83.5, 32.25], [-83.25, 32.15], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.18, 32.18], [-82.15, 32.25], [-82.25, 32.5], [-82.15, 32.75], [-82.25, 33.0], [-82.03, 33.53], [-81.5, 33.75], [-80.97, 33.53], [-80.82, 33.18], [-80.47, 33.03], [-80.25, 32.5], [-80.47, 31.97], [-80.82, 31.82], [-80.85, 31.75], [-80.75, 31.5], [-80.85, 31.25], [-80.75, 31.0], [-80.85, 30.75], [-80.75, 30.5], [-80.85, 30.25], [-80.75, 30.0], [-80.85, 29.75], [-80.75, 29.5], [-80.97, 28.97], [-81.32, 28.82], [-81.35, 28.75], [-81.25, 28.5], [-81.35, 28.25], [-81.25, 28.0], [-81.47, 27.47], [-81.82, 27.32], [-81.85, 27.25], [-81.75, 27.0], [-81.97, 26.47], [-82.5, 26.25], [-83.03, 26.47], [-83.25, 27.0], [-83.15, 27.25], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.15, 28.25], [-83.25, 28.5], [-83.15, 28.75], [-83.18, 28.82], [-83.53, 28.97], [-83.68, 29.32], [-84.03, 29.47], [-84.18, 29.82], [-84.3, 29.88], [-84.47, 29.47], [-85.0, 29.25], [-85.53, 29.47], [-85.68, 29.82], [-86.03, 29.97], [-86.25, 30.5]]]]}, "2024-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.25, 30.5], [-86.03, 31.03], [-85.5, 31.25], [-85.25, 31.15], [-85.18, 31.18], [-85.03, 31.53], [-84.68, 31.68], [-84.53, 32.03], [-84.0, 32.25], [-83.75, 32.15], [-83.5, 32.25], [-83.25, 32.15], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.18, 32.18], [-82.15, 32.25], [-82.25, 32.5], [-82.15, 32.75], [-82.25, 33.0], [-82.03, 33.53], [-81.5, 33.75], [-80.97, 33.53], [-80.82, 33.18], [-80.47, 33.03], [-80.25, 32.5], [-80.47, 31.97], [-80.82, 31.82], [-80.85, 31.75], [-80.75, 31.5], [-80.85, 31.25], [-80.75, 31.0], [-80.85, 30.75], [-80.75, 30.5], [-80.85, 30.25], [-80.82, 30.18], [-80.47, 30.03], [-80.25, 29.5], [-80.35, 29.25], [-80.32, 29.18], [-79.97, 29.03], [-79.75, 28.5], [-79.97, 27.97], [-80.32, 27.82], [-80.35, 27.75], [-80.32, 27.68], [-79.97, 27.53], [-79.75, 27.0], [-79.97, 26.47], [-80.32, 26.32], [-80.35, 26.25], [-80.25, 26.0], [-80.37, 25.7], [-79.97, 25.53], [-79.75, 25.0], [-79.97, 24.47], [-80.32, 24.32], [-80.47, 23.97], [-80.82, 23.82], [-80.97, 23.47], [-81.5, 23.25], [-82.03, 23.47], [-82.18, 23.82], [-82.25, 23.85], [-82.5, 23.75], [-83.03, 23.97], [-83.25, 24.5], [-83.15, 24.75], [-83.18, 24.82], [-83.53, 24.97], [-83.75, 25.5], [-83.53, 26.03], [-83.18, 26.18], [-83.15, 26.25], [-83.25, 26.5], [-83.15, 26.75], [-83.25, 27.0], [-83.15, 27.25], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.15, 28.25], [-83.25, 28.5], [-83.15, 28.75], [-83.18, 28.82], [-83.53, 28.97], [-83.68, 29.32], [-84.03, 29.47], [-84.18, 29.82], [-84.3, 29.88], [-84.47, 29.47], [-85.0, 29.25], [-85.53, 29.47], [-85.68, 29.82], [-86.03, 29.97], [-86.25, 30.5]]]]}, "2024-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.25, 30.5], [-86.03, 31.03], [-85.5, 31.25], [-85.25, 31.15], [-85.18, 31.18], [-85.03, 31.53], [-84.68, 31.68], [-84.53, 32.03], [-84.0, 32.25], [-83.75, 32.15], [-83.5, 32.25], [-83.25, 32.15], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.18, 32.18], [-82.15, 32.25], [-82.25, 32.5], [-82.15, 32.75], [-82.25, 33.0], [-82.03, 33.53], [-81.5, 33.75], [-80.97, 33.53], [-80.82, 33.18], [-80.47, 33.03], [-80.25, 32.5], [-80.47, 31.97], [-80.82, 31.82], [-80.85, 31.75], [-80.75, 31.5], [-80.85, 31.25], [-80.75, 31.0], [-80.85, 30.75], [-80.75, 30.5], [-80.85, 30.25], [-80.82, 30.18], [-80.47, 30.03], [-80.25, 29.5], [-80.35, 29.25], [-80.32, 29.18], [-79.97, 29.03], [-79.75, 28.5], [-79.97, 27.97], [-80.32, 27.82], [-80.35, 27.75], [-80.32, 27.68], [-79.97, 27.53], [-79.75, 27.0], [-79.97, 26.47], [-80.32, 26.32], [-80.35, 26.25], [-80.25, 26.0], [-80.37, 25.7], [-79.97, 25.53], [-79.75, 25.0], [-79.97, 24.47], [-80.32, 24.32], [-80.47, 23.97], [-80.82, 23.82], [-80.97, 23.47], [-81.5, 23.25], [-82.03, 23.47], [-82.18, 23.82], [-82.25, 23.85], [-82.5, 23.75], [-83.03, 23.97], [-83.25, 24.5], [-83.15, 24.75], [-83.18, 24.82], [-83.53, 24.97], [-83.75, 25.5], [-83.53, 26.03], [-83.18, 26.18], [-83.15, 26.25], [-83.25, 26.5], [-83.15, 26.75], [-83.25, 27.0], [-83.15, 27.25], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.15, 28.25], [-83.25, 28.5], [-83.15, 28.75], [-83.18, 28.82], [-83.53, 28.97], [-83.68, 29.32], [-84.03, 29.47], [-84.18, 29.82], [-84.3, 29.88], [-84.47, 29.47], [-85.0, 29.25], [-85.53, 29.47], [-85.68, 29.82], [-86.03, 29.97], [-86.25, 30.5]]]]}, "2024-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.25, 30.5], [-86.03, 31.03], [-85.5, 31.25], [-85.25, 31.15], [-85.18, 31.18], [-85.03, 31.53], [-84.68, 31.68], [-84.53, 32.03], [-84.0, 32.25], [-83.75, 32.15], [-83.5, 32.25], [-83.25, 32.15], [-83.0, 32.25], [-82.75, 32.15], [-82.5, 32.25], [-82.25, 32.15], [-82.18, 32.18], [-82.15, 32.25], [-82.25, 32.5], [-82.15, 32.75], [-82.25, 33.0], [-82.03, 33.53], [-81.5, 33.75], [-80.97, 33.53], [-80.82, 33.18], [-80.47, 33.03], [-80.25, 32.5], [-80.47, 31.97], [-80.82, 31.82], [-80.85, 31.75], [-80.75, 31.5], [-80.85, 31.25], [-80.75, 31.0], [-80.85, 30.75], [-80.75, 30.5], [-80.85, 30.25], [-80.82, 30.18], [-80.47, 30.03], [-80.25, 29.5], [-80.35, 29.25], [-80.32, 29.18], [-79.97, 29.03], [-79.75, 28.5], [-79.97, 27.97], [-80.32, 27.82], [-80.35, 27.75], [-80.32, 27.68], [-79.97, 27.53], [-79.75, 27.0], [-79.97, 26.47], [-80.32, 26.32], [-80.35, 26.25], [-80.25, 26.0], [-80.37, 25.7], [-79.97, 25.53], [-79.75, 25.0], [-79.97, 24.47], [-80.32, 24.32], [-80.47, 23.97], [-80.82, 23.82], [-80.97, 23.47], [-81.5, 23.25], [-82.03, 23.47], [-82.18, 23.82], [-82.25, 23.85], [-82.5, 23.75], [-83.03, 23.97], [-83.25, 24.5], [-83.15, 24.75], [-83.18, 24.82], [-83.53, 24.97], [-83.75, 25.5], [-83.53, 26.03], [-83.18, 26.18], [-83.15, 26.25], [-83.25, 26.5], [-83.15, 26.75], [-83.25, 27.0], [-83.15, 27.25], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.15, 28.25], [-83.25, 28.5], [-83.15, 28.75], [-83.18, 28.82], [-83.53, 28.97], [-83.68, 29.32], [-84.03, 29.47], [-84.18, 29.82], [-84.3, 29.88], [-84.47, 29.47], [-85.0, 29.25], [-85.53, 29.47], [-85.68, 29.82], [-86.03, 29.97], [-86.25, 30.5]]]]}, "2024-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.0, 25.75], [-80.47, 25.53], [-80.25, 25.0], [-80.47, 24.47], [-81.0, 24.25], [-81.53, 24.47], [-81.75, 25.0], [-81.53, 25.53], [-81.0, 25.75]]]]}, "2024-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.0, 25.75], [-80.47, 25.53], [-80.25, 25.0], [-80.47, 24.47], [-81.0, 24.25], [-81.53, 24.47], [-81.75, 25.0], [-81.53, 25.53], [-81.0, 25.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.185848592716525}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.611465741239494}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.075938706170973, 7.265422247361755, 11.788839213053336, 10.737210591634152, 10.47440007527672, 18.967465972900413, 18.576399739583337]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.739722188313806, 3.577490743001306, 4.9623886108398665, 2.9184738159179915, 2.0693514506022552, 18.967465972900413, 18.576399739583337]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.011054641197011, -7.420796163972301, -5.781575812741315, -6.6848637360014305, -6.827014222225503, -3.6768798329893, -4.034708193482857]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.6746958983482045, -8.750940964642382, -7.658087618702041, -8.508234463510291, -9.185848592716525, -3.6768798329893, -4.034708193482857]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5604298986504856, -1.67822032259717, -1.6065271998756532, -1.8128253122537992, -1.8660511533290276, -1.7999411330460933, -1.913744832990248]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.726141823891496, -1.8451752348646806, -1.8621645920102665, -2.230012084125244, -2.541938021128474, -1.7999411330460933, -1.913744832990248]}}