{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:47.595270", "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-Jan-10_to_2026-Jan-15_257.5_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": 2026010000395}, "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": "January 10 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 15 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 207367.21611568175}, "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": 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": 257.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-101.82, 24.32], [-101.97, 23.97], [-102.5, 23.75], [-102.75, 23.85], [-103.0, 23.75], [-103.25, 23.85], [-103.5, 23.75], [-103.75, 23.85], [-104.0, 23.75], [-104.25, 23.85], [-104.5, 23.75], [-105.03, 23.97], [-105.18, 24.32], [-105.25, 24.35], [-105.5, 24.25], [-106.03, 24.47], [-106.25, 25.0], [-106.15, 25.25], [-106.18, 25.32], [-106.53, 25.47], [-106.68, 25.82], [-106.75, 25.85], [-107.0, 25.75], [-107.53, 25.97], [-107.75, 26.5], [-107.65, 26.75], [-107.68, 26.82], [-108.03, 26.97], [-108.25, 27.5], [-108.15, 27.75], [-108.25, 28.0], [-108.03, 28.53], [-107.68, 28.68], [-107.53, 29.03], [-107.18, 29.18], [-107.15, 29.25], [-107.25, 29.5], [-107.03, 30.03], [-106.5, 30.25], [-105.97, 30.03], [-105.75, 29.5], [-105.85, 29.25], [-105.82, 29.18], [-105.75, 29.15], [-105.5, 29.25], [-104.97, 29.03], [-104.82, 28.68], [-104.75, 28.65], [-104.5, 28.75], [-103.97, 28.53], [-103.82, 28.18], [-103.75, 28.15], [-103.5, 28.25], [-103.25, 28.15], [-103.0, 28.25], [-102.47, 28.03], [-102.32, 27.68], [-101.97, 27.53], [-101.75, 27.0], [-101.87, 26.7], [-101.75, 26.65], [-101.5, 26.75], [-101.25, 26.65], [-101.0, 26.75], [-100.47, 26.53], [-100.25, 26.0], [-100.47, 25.47], [-100.82, 25.32], [-100.97, 24.97], [-101.32, 24.82], [-101.47, 24.47], [-101.82, 24.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.25, 28.0], [-108.03, 28.53], [-107.68, 28.68], [-107.53, 29.03], [-107.18, 29.18], [-107.15, 29.25], [-107.25, 29.5], [-107.03, 30.03], [-106.5, 30.25], [-105.97, 30.03], [-105.75, 29.5], [-105.85, 29.25], [-105.75, 29.0], [-105.85, 28.75], [-105.75, 28.5], [-105.96000000000001, 28.0], [-105.75, 27.5], [-105.85, 27.25], [-105.82, 27.18], [-105.47, 27.03], [-105.25, 26.5], [-105.35, 26.25], [-105.25, 26.0], [-105.37, 25.7], [-104.97, 25.53], [-104.75, 25.0], [-104.97, 24.47], [-105.5, 24.25], 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"Mean t2m anomaly over entire duration", "value": -6.05732437075629}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.850990549723349, 4.577430386013475, 3.5455043877495314, 5.74605615077877, 8.970791371663381, 8.766094970703136]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.844337717692099, -0.2262100219726335, 0.4664169311523665, 3.0256159464518646, 7.219668324788415, 8.331964111328148]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7778740070828967, -6.083187085486147, -7.204192983863423, -5.70568910620544, -4.06446103512277, -4.317580727384268]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.923755587192204, -8.407064782878876, -11.009632506786772, 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