{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:41.025281", "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-Nov-11_to_2025-Nov-14_279.0_26.5"}, "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": 2025110000329}, "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 11 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 14 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": 292162.11954111}, "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": ["Bahamas", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Caribbean", "E.North-America", "N.Atlantic-Ocean"]}, "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": ["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": 26.5}, "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": 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": 277.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 287.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 28.0], [-83.03, 28.53], [-82.5, 28.75], [-82.25, 28.65], [-82.18, 28.68], [-82.15, 28.75], [-82.25, 29.0], [-82.03, 29.53], [-81.5, 29.75], [-81.25, 29.65], [-81.0, 29.75], [-80.47, 29.53], [-80.32, 29.18], [-79.97, 29.03], [-79.82, 28.68], [-79.47, 28.53], [-79.32, 28.18], [-79.25, 28.15], [-79.18, 28.18], [-79.03, 28.53], [-78.5, 28.75], [-78.25, 28.65], [-78.0, 28.75], [-77.75, 28.65], [-77.5, 28.75], [-77.25, 28.65], [-77.0, 28.75], [-76.75, 28.65], [-76.5, 28.75], [-76.25, 28.65], [-76.0, 28.75], [-75.75, 28.65], [-75.5, 28.75], [-75.25, 28.65], [-75.0, 28.75], [-74.75, 28.65], [-74.5, 28.75], [-74.25, 28.65], [-74.0, 28.75], [-73.75, 28.65], [-73.68, 28.68], [-73.53, 29.03], [-73.0, 29.25], [-72.75, 29.15], [-72.5, 29.25], [-71.97, 29.03], [-71.75, 28.5], [-71.85, 28.25], [-71.75, 28.0], [-71.97, 27.47], [-72.32, 27.32], [-72.47, 26.97], [-72.82, 26.82], [-72.85, 26.75], [-72.75, 26.5], [-72.97, 25.97], [-73.5, 25.75], [-73.75, 25.85], [-73.82, 25.82], [-73.97, 25.47], [-74.32, 25.32], [-74.47, 24.97], [-75.0, 24.75], [-75.25, 24.85], [-75.32, 24.82], [-75.47, 24.47], [-76.0, 24.25], [-76.25, 24.35], [-76.5, 24.25], [-76.75, 24.35], [-77.0, 24.25], [-77.25, 24.35], [-77.5, 24.25], [-77.75, 24.35], [-78.0, 24.25], [-78.25, 24.35], [-78.5, 24.25], [-78.75, 24.35], [-78.82, 24.32], [-78.97, 23.97], [-79.5, 23.75], [-80.03, 23.97], [-80.25, 24.5], [-80.15, 24.75], [-80.25, 25.0], [-80.15, 25.25], [-80.25, 25.5], [-80.04, 26.0], [-80.2, 26.38], [-80.32, 26.32], [-80.47, 25.97], [-81.0, 25.75], [-81.25, 25.85], [-81.5, 25.75], [-82.03, 25.97], [-82.18, 26.32], [-82.53, 26.47], [-82.75, 27.0], [-82.65, 27.25], [-82.68, 27.32], [-83.03, 27.47], [-83.25, 28.0]]]]}, "2025-11-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 28.0], [-83.03, 28.53], [-82.5, 28.75], [-82.25, 28.65], [-82.18, 28.68], [-82.15, 28.75], [-82.25, 29.0], [-82.03, 29.53], [-81.5, 29.75], [-81.25, 29.65], [-81.0, 29.75], [-80.47, 29.53], [-80.32, 29.18], [-79.97, 29.03], [-79.82, 28.68], [-79.47, 28.53], [-79.32, 28.18], [-79.25, 28.15], [-79.18, 28.18], [-79.03, 28.53], [-78.5, 28.75], [-78.25, 28.65], [-78.0, 28.75], [-77.75, 28.65], [-77.5, 28.75], [-77.25, 28.65], [-77.0, 28.75], [-76.75, 28.65], [-76.5, 28.75], [-76.25, 28.65], [-76.0, 28.75], [-75.75, 28.65], [-75.5, 28.75], [-75.25, 28.65], [-75.0, 28.75], [-74.75, 28.65], [-74.5, 28.75], [-74.25, 28.65], [-74.0, 28.75], [-73.75, 28.65], [-73.68, 28.68], [-73.53, 29.03], [-73.0, 29.25], [-72.75, 29.15], [-72.5, 29.25], [-71.97, 29.03], [-71.75, 28.5], [-71.85, 28.25], [-71.75, 28.0], [-71.97, 27.47], [-72.32, 27.32], [-72.47, 26.97], [-72.82, 26.82], [-72.85, 26.75], [-72.75, 26.5], [-72.97, 25.97], [-73.5, 25.75], [-73.75, 25.85], [-73.82, 25.82], [-73.97, 25.47], [-74.32, 25.32], [-74.47, 24.97], [-75.0, 24.75], [-75.25, 24.85], [-75.32, 24.82], [-75.47, 24.47], [-76.0, 24.25], [-76.25, 24.35], [-76.5, 24.25], [-76.75, 24.35], [-77.0, 24.25], [-77.25, 24.35], [-77.5, 24.25], [-77.75, 24.35], [-78.0, 24.25], [-78.25, 24.35], [-78.5, 24.25], [-78.75, 24.35], [-78.82, 24.32], [-78.97, 23.97], [-79.5, 23.75], [-80.03, 23.97], [-80.25, 24.5], [-80.15, 24.75], [-80.25, 25.0], [-80.15, 25.25], [-80.25, 25.5], [-80.04, 26.0], [-80.2, 26.38], [-80.32, 26.32], [-80.47, 25.97], [-81.0, 25.75], [-81.25, 25.85], [-81.5, 25.75], [-82.03, 25.97], [-82.18, 26.32], [-82.53, 26.47], [-82.75, 27.0], [-82.65, 27.25], [-82.68, 27.32], [-83.03, 27.47], [-83.25, 28.0]]]]}, "2025-11-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.25, 28.0], [-83.03, 28.53], [-82.5, 28.75], [-82.25, 28.65], [-82.18, 28.68], [-82.15, 28.75], [-82.25, 29.0], [-82.03, 29.53], [-81.5, 29.75], [-81.25, 29.65], [-81.0, 29.75], [-80.47, 29.53], [-80.32, 29.18], [-79.97, 29.03], [-79.82, 28.68], [-79.47, 28.53], [-79.32, 28.18], [-79.25, 28.15], [-79.18, 28.18], [-79.03, 28.53], [-78.5, 28.75], [-78.25, 28.65], [-78.0, 28.75], [-77.75, 28.65], [-77.5, 28.75], [-77.25, 28.65], [-77.0, 28.75], [-76.75, 28.65], [-76.5, 28.75], [-76.25, 28.65], [-76.0, 28.75], [-75.75, 28.65], [-75.5, 28.75], [-75.25, 28.65], [-75.0, 28.75], [-74.75, 28.65], [-74.5, 28.75], [-74.25, 28.65], [-74.0, 28.75], [-73.75, 28.65], [-73.68, 28.68], [-73.53, 29.03], [-73.0, 29.25], [-72.75, 29.15], [-72.5, 29.25], [-71.97, 29.03], [-71.75, 28.5], [-71.85, 28.25], [-71.75, 28.0], [-71.97, 27.47], [-72.32, 27.32], [-72.47, 26.97], [-72.82, 26.82], [-72.85, 26.75], [-72.75, 26.5], [-72.97, 25.97], [-73.5, 25.75], [-73.75, 25.85], [-73.82, 25.82], [-73.97, 25.47], [-74.32, 25.32], [-74.47, 24.97], [-75.0, 24.75], [-75.25, 24.85], [-75.32, 24.82], [-75.47, 24.47], [-76.0, 24.25], [-76.25, 24.35], [-76.5, 24.25], [-76.75, 24.35], [-77.0, 24.25], [-77.25, 24.35], [-77.5, 24.25], [-77.75, 24.35], [-78.0, 24.25], [-78.25, 24.35], [-78.5, 24.25], [-78.75, 24.35], [-78.82, 24.32], [-78.97, 23.97], [-79.5, 23.75], [-80.03, 23.97], [-80.25, 24.5], [-80.15, 24.75], [-80.25, 25.0], [-80.15, 25.25], [-80.25, 25.5], [-80.04, 26.0], [-80.2, 26.38], [-80.32, 26.32], [-80.47, 25.97], [-81.0, 25.75], [-81.25, 25.85], [-81.5, 25.75], [-82.03, 25.97], [-82.18, 26.32], [-82.53, 26.47], [-82.75, 27.0], [-82.65, 27.25], [-82.68, 27.32], [-83.03, 27.47], [-83.25, 28.0]]]]}, "2025-11-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.03, 25.97], [-82.25, 26.5], [-82.03, 27.03], [-81.5, 27.25], [-81.25, 27.15], [-81.0, 27.25], [-80.47, 27.03], [-80.25, 26.5], [-80.47, 25.97], [-81.0, 25.75], [-81.25, 25.85], [-81.5, 25.75], [-82.03, 25.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.69769899454218}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.295043006749717}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.787080695194277, 18.536908434022223, 20.746445076420628, 17.872335052490257]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.817019399007165, 9.973437245686853, 13.78723805745443, 17.630757904052757]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.941192943474849, -5.120576491660063, -2.8281610509635033, -4.040565316738963]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.69769899454218, -9.916805669446035, -6.05017874521252, -4.119436287327289]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.902263802291251, -3.2639397314848337, -1.7909156695626995, -1.4157248770118787]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.360411366399974, -3.8647003055858242, -2.588819602789559, -1.4213798990778688]}}