{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:49.044169", "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-19_to_2025-Nov-23_244.5_31.0"}, "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": 2025110000539}, "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 19 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 23 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 68173.94154534077}, "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": ["Mexico", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 31.0}, "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": 244.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "244.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 243.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 246.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-117.25, 33.5], [-117.15, 33.75], [-117.25, 34.0], [-117.15, 34.25], [-117.25, 34.5], [-117.03, 35.03], [-116.5, 35.25], [-115.97, 35.03], [-115.82, 34.68], [-115.47, 34.53], [-115.32, 34.18], [-115.25, 34.15], [-115.0, 34.25], [-114.47, 34.03], [-114.32, 33.68], [-113.97, 33.53], [-113.75, 33.0], [-113.85, 32.75], [-113.75, 32.5], [-113.97, 31.97], [-114.5, 31.75], [-114.75, 31.85], [-114.87, 31.8], [-114.82, 31.68], [-114.47, 31.53], [-114.25, 31.0], [-114.35, 30.75], [-114.32, 30.68], [-113.97, 30.53], [-113.75, 30.0], [-113.85, 29.75], [-113.82, 29.68], [-113.47, 29.53], [-113.25, 29.0], [-113.47, 28.47], [-114.0, 28.25], [-114.53, 28.47], [-114.68, 28.82], [-115.03, 28.97], [-115.18, 29.32], [-115.25, 29.35], [-115.5, 29.25], [-116.03, 29.47], [-116.25, 30.0], [-116.15, 30.25], [-116.18, 30.32], [-116.53, 30.47], [-116.75, 31.0], [-116.65, 31.25], [-116.75, 31.5], [-116.65, 31.75], [-116.75, 32.0], [-116.65, 32.25], [-116.68, 32.32], [-117.03, 32.47], [-117.25, 33.0], [-117.15, 33.25], [-117.25, 33.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.25, 33.5], [-117.15, 33.75], [-117.25, 34.0], [-117.15, 34.25], [-117.25, 34.5], [-117.03, 35.03], [-116.5, 35.25], [-115.97, 35.03], [-115.82, 34.68], [-115.47, 34.53], [-115.32, 34.18], [-115.25, 34.15], [-115.0, 34.25], [-114.47, 34.03], [-114.25, 33.5], [-114.47, 32.97], [-115.0, 32.75], [-115.25, 32.85], [-115.32, 32.82], [-115.35, 32.75], [-115.25, 32.5], [-115.35, 32.25], [-115.32, 32.18], [-114.97, 32.03], [-114.82, 31.68], [-114.47, 31.53], [-114.25, 31.0], [-114.35, 30.75], [-114.32, 30.68], [-113.97, 30.53], [-113.75, 30.0], [-113.85, 29.75], [-113.75, 29.5], [-113.97, 28.97], [-114.5, 28.75], [-115.03, 28.97], [-115.18, 29.32], [-115.25, 29.35], [-115.5, 29.25], [-116.03, 29.47], [-116.25, 30.0], [-116.15, 30.25], [-116.18, 30.32], [-116.53, 30.47], [-116.75, 31.0], [-116.65, 31.25], [-116.75, 31.5], [-116.65, 31.75], [-116.75, 32.0], [-116.65, 32.25], [-116.68, 32.32], [-117.03, 32.47], [-117.25, 33.0], [-117.15, 33.25], [-117.25, 33.5]]]]}, "2025-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.25, 33.5], [-117.15, 33.75], [-117.25, 34.0], [-117.15, 34.25], [-117.25, 34.5], [-117.03, 35.03], [-116.5, 35.25], [-115.97, 35.03], [-115.82, 34.68], [-115.47, 34.53], [-115.32, 34.18], [-115.25, 34.15], [-115.0, 34.25], [-114.47, 34.03], [-114.32, 33.68], [-113.97, 33.53], [-113.75, 33.0], [-113.85, 32.75], [-113.75, 32.5], [-113.97, 31.97], [-114.5, 31.75], [-114.75, 31.85], [-114.87, 31.8], [-114.82, 31.68], [-114.47, 31.53], [-114.25, 31.0], [-114.35, 30.75], [-114.32, 30.68], [-113.97, 30.53], [-113.75, 30.0], [-113.85, 29.75], [-113.82, 29.68], [-113.47, 29.53], [-113.25, 29.0], [-113.47, 28.47], [-114.0, 28.25], [-114.53, 28.47], [-114.68, 28.82], [-115.03, 28.97], [-115.18, 29.32], [-115.25, 29.35], [-115.5, 29.25], [-116.03, 29.47], [-116.25, 30.0], [-116.15, 30.25], [-116.18, 30.32], [-116.53, 30.47], [-116.75, 31.0], [-116.65, 31.25], [-116.75, 31.5], [-116.65, 31.75], [-116.75, 32.0], [-116.65, 32.25], [-116.68, 32.32], [-117.03, 32.47], [-117.25, 33.0], [-117.15, 33.25], [-117.25, 33.5]]]]}, "2025-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.25, 33.5], [-117.15, 33.75], [-117.25, 34.0], [-117.15, 34.25], [-117.25, 34.5], [-117.03, 35.03], [-116.5, 35.25], [-115.97, 35.03], [-115.82, 34.68], [-115.47, 34.53], [-115.32, 34.18], [-115.25, 34.15], [-115.0, 34.25], [-114.47, 34.03], [-114.32, 33.68], [-113.97, 33.53], [-113.75, 33.0], [-113.85, 32.75], [-113.75, 32.5], [-113.97, 31.97], [-114.5, 31.75], [-114.75, 31.85], [-114.87, 31.8], [-114.82, 31.68], [-114.47, 31.53], [-114.25, 31.0], [-114.35, 30.75], [-114.32, 30.68], [-113.97, 30.53], [-113.75, 30.0], [-113.85, 29.75], [-113.82, 29.68], [-113.47, 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31.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.719699439966689}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.748281101100256}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.497146976355339, 10.556468044183248, 11.062718670184779, 11.162904357910236, 11.639678482782301]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.8541249593099, 4.008663431803427, 5.357174173990927, 5.743511454264365, 5.155512746175134]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.9118709115357015, -5.119989117729405, -4.41490338924659, -4.498215003528425, -4.520456732117339]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.9803417689943785, -7.719699439966689, -6.149461630142639, -5.584049216365372, -5.9358502519565945]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6289820826048098, -1.702358819656501, -1.491915567271665, -1.5474130485643913, -1.5826175138281615]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9181581534196381, -2.133606620787256, -1.8104352577859448, -1.929833952029273, -1.8352956582272992]}}