{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:47.072335", "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-Mar-17_to_2026-Mar-19_272.5_27.0"}, "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": 2026030000526}, "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": "March 17 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 19 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": 169134.39378371372}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 27.0}, "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": 272.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.25}, "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": 28.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-90.18, 26.18], [-90.03, 26.53], [-89.68, 26.68], [-89.65, 26.75], [-89.75, 27.0], [-89.53, 27.53], [-89.18, 27.68], [-89.03, 28.03], [-88.68, 28.18], [-88.53, 28.53], [-88.0, 28.75], [-87.47, 28.53], [-87.32, 28.18], [-87.25, 28.15], [-87.0, 28.25], [-86.47, 28.03], [-86.32, 27.68], [-86.25, 27.65], [-86.18, 27.68], [-86.03, 28.03], [-85.5, 28.25], [-84.97, 28.03], [-84.82, 27.68], [-84.75, 27.65], [-84.5, 27.75], [-84.25, 27.65], [-84.0, 27.75], [-83.75, 27.65], [-83.5, 27.75], [-83.25, 27.65], [-83.0, 27.75], [-82.47, 27.53], [-82.25, 27.0], [-82.47, 26.47], [-82.82, 26.32], [-82.97, 25.97], [-83.5, 25.75], [-83.75, 25.85], [-83.82, 25.82], [-83.97, 25.47], [-84.32, 25.32], [-84.47, 24.97], [-84.82, 24.82], [-84.97, 24.47], [-85.5, 24.25], [-85.75, 24.35], [-86.0, 24.25], [-86.25, 24.35], [-86.32, 24.32], [-86.47, 23.97], [-87.0, 23.75], [-87.25, 23.85], [-87.5, 23.75], [-88.03, 23.97], [-88.25, 24.5], [-88.15, 24.75], [-88.2, 24.88], [-88.5, 24.75], [-88.75, 24.85], [-88.82, 24.82], [-88.97, 24.47], [-89.5, 24.25], [-89.75, 24.35], [-90.0, 24.25], [-90.53, 24.47], [-90.75, 25.0], [-90.65, 25.25], [-90.75, 25.5], [-90.53, 26.03], [-90.18, 26.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America", "N.Central-America", "S.Central-America", "Caribbean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.75, 25.5], [-90.52999999999997, 26.03], [-90.18, 26.18], [-90.02999999999997, 26.53], [-89.68, 26.68], [-89.64999999999998, 26.75], [-89.75, 27.0], [-89.52999999999997, 27.53], [-89.18, 27.68], [-89.02999999999997, 28.03], [-88.68, 28.18], [-88.52999999999997, 28.53], [-88.0, 28.75], [-87.47000000000003, 28.53], [-87.32, 28.18], [-87.25, 28.15], [-87.0, 28.25], [-86.47000000000003, 28.03], [-86.32, 27.68], [-86.25, 27.65], [-86.18, 27.68], [-86.02999999999997, 28.03], [-85.5, 28.25], [-84.97000000000003, 28.03], [-84.82, 27.68], [-84.75, 27.65], [-84.5, 27.75], [-84.25, 27.65], [-84.0, 27.75], [-83.75, 27.65], [-83.5, 27.75], [-83.25, 27.65], [-83.0, 27.75], [-82.47000000000003, 27.53], [-82.25, 27.0], [-82.47000000000003, 26.47], [-82.82, 26.32], [-82.97000000000003, 25.97], [-83.5, 25.75], [-83.75, 25.85], [-83.82, 25.82], [-83.97000000000003, 25.47], [-84.32, 25.32], [-84.47000000000003, 24.97], [-84.82, 24.82], [-84.97000000000003, 24.47], [-85.5, 24.25], [-85.75, 24.35], [-86.0, 24.25], [-86.25, 24.35], [-86.32, 24.32], [-86.47000000000003, 23.97], [-87.0, 23.75], [-87.25, 23.85], [-87.5, 23.75], [-88.02999999999997, 23.97], [-88.25, 24.5], [-88.14999999999998, 24.75], [-88.19999999999999, 24.88], [-88.5, 24.75], [-88.75, 24.85], [-88.82, 24.82], [-88.97000000000003, 24.47], [-89.5, 24.25], [-89.75, 24.35], [-90.0, 24.25], [-90.52999999999997, 24.47], [-90.75, 25.0], [-90.64999999999998, 25.25], [-90.75, 25.5]]]]}, "2026-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.75, 25.5], [-90.52999999999997, 26.03], [-90.18, 26.18], [-90.02999999999997, 26.53], [-89.68, 26.68], [-89.64999999999998, 26.75], [-89.75, 27.0], [-89.52999999999997, 27.53], [-89.18, 27.68], [-89.02999999999997, 28.03], [-88.68, 28.18], [-88.52999999999997, 28.53], [-88.0, 28.75], [-87.47000000000003, 28.53], [-87.32, 28.18], [-87.25, 28.15], [-87.0, 28.25], [-86.47000000000003, 28.03], [-86.32, 27.68], [-86.25, 27.65], [-86.18, 27.68], [-86.02999999999997, 28.03], [-85.5, 28.25], [-84.97000000000003, 28.03], [-84.82, 27.68], [-84.75, 27.65], [-84.5, 27.75], [-84.25, 27.65], [-84.0, 27.75], [-83.75, 27.65], [-83.5, 27.75], [-83.25, 27.65], [-83.0, 27.75], [-82.47000000000003, 27.53], [-82.25, 27.0], [-82.47000000000003, 26.47], [-82.82, 26.32], [-82.97000000000003, 25.97], [-83.5, 25.75], [-83.75, 25.85], [-83.82, 25.82], [-83.97000000000003, 25.47], [-84.32, 25.32], [-84.47000000000003, 24.97], [-84.82, 24.82], [-84.97000000000003, 24.47], [-85.5, 24.25], [-85.75, 24.35], [-86.0, 24.25], [-86.25, 24.35], [-86.32, 24.32], [-86.47000000000003, 23.97], [-87.0, 23.75], [-87.25, 23.85], [-87.5, 23.75], [-88.02999999999997, 23.97], [-88.25, 24.5], [-88.14999999999998, 24.75], [-88.19999999999999, 24.88], [-88.5, 24.75], [-88.75, 24.85], [-88.82, 24.82], [-88.97000000000003, 24.47], [-89.5, 24.25], [-89.75, 24.35], [-90.0, 24.25], [-90.52999999999997, 24.47], [-90.75, 25.0], [-90.64999999999998, 25.25], [-90.75, 25.5]]]]}, "2026-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.75, 25.5], [-90.52999999999997, 26.03], [-90.18, 26.18], [-90.02999999999997, 26.53], [-89.68, 26.68], [-89.64999999999998, 26.75], [-89.75, 27.0], [-89.52999999999997, 27.53], [-89.18, 27.68], [-89.02999999999997, 28.03], [-88.68, 28.18], [-88.52999999999997, 28.53], [-88.0, 28.75], [-87.47000000000003, 28.53], [-87.32, 28.18], [-87.25, 28.15], [-87.0, 28.25], [-86.47000000000003, 28.03], [-86.32, 27.68], [-86.25, 27.65], [-86.18, 27.68], [-86.02999999999997, 28.03], [-85.5, 28.25], [-84.97000000000003, 28.03], [-84.82, 27.68], [-84.75, 27.65], [-84.5, 27.75], [-84.25, 27.65], [-84.0, 27.75], [-83.75, 27.65], [-83.5, 27.75], [-83.25, 27.65], [-83.0, 27.75], [-82.47000000000003, 27.53], [-82.25, 27.0], [-82.47000000000003, 26.47], [-82.82, 26.32], [-82.97000000000003, 25.97], [-83.5, 25.75], [-83.75, 25.85], [-83.82, 25.82], [-83.97000000000003, 25.47], [-84.32, 25.32], [-84.47000000000003, 24.97], [-84.82, 24.82], [-84.97000000000003, 24.47], [-85.5, 24.25], [-85.75, 24.35], [-86.0, 24.25], [-86.25, 24.35], [-86.32, 24.32], [-86.47000000000003, 23.97], [-87.0, 23.75], [-87.25, 23.85], [-87.5, 23.75], [-88.02999999999997, 23.97], [-88.25, 24.5], [-88.14999999999998, 24.75], [-88.19999999999999, 24.88], [-88.5, 24.75], [-88.75, 24.85], [-88.82, 24.82], [-88.97000000000003, 24.47], [-89.5, 24.25], [-89.75, 24.35], [-90.0, 24.25], [-90.52999999999997, 24.47], [-90.75, 25.0], [-90.64999999999998, 25.25], [-90.75, 25.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.023133844378549}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.394485884434359}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.572332250876457, 16.693216630279096, 19.00080671883677]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.525126393636071, 14.741948699951195, 16.888631439209007]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.535804211741438, -5.488417481036827, -3.1592359605248097]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.023133844378549, -6.2962257032443745, -3.7733978992375796]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2054974527675935, -2.7982797568581583, -1.6163853315466736]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.0372664893646837, -3.239293376073691, -2.242962505543527]}}