{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:53:30.722268", "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-May-27_to_2026-May-30_245.0_33.0"}, "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": 2026050000670}, "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": "May 27 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 30 2026"}, "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": 142066.6587650383}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-America", "W.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 California"]}, "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": 33.0}, "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": 245.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "245.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 243.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 248.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-116.03, 31.03], [-115.5, 31.25], [-114.97, 31.03], [-114.82, 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33.75], [-116.25, 33.65], [-116.0, 33.75], [-115.5, 33.54], [-115.18, 33.68], [-115.15, 33.75], [-115.25, 34.0], [-115.15, 34.25], [-115.25, 34.5], [-115.03, 35.03], [-114.5, 35.25], [-114.25, 35.15], [-114.0, 35.25], [-113.47, 35.03], [-113.32, 34.68], [-112.97, 34.53], [-112.75, 34.0], [-112.85, 33.75], [-112.82, 33.68], [-112.47, 33.53], [-112.32, 33.18], [-111.97, 33.03], [-111.75, 32.5], [-111.85, 32.25], [-111.75, 32.0], [-111.85, 31.75], [-111.75, 31.5], [-111.85, 31.25], [-111.75, 31.0], [-111.85, 30.75], [-111.82, 30.68], [-111.75, 30.65], [-111.5, 30.75], [-110.97, 30.53], [-110.75, 30.0], [-110.85, 29.75], [-110.75, 29.5], [-110.97, 28.97], [-111.5, 28.75], [-111.75, 28.85], [-112.0, 28.75], [-112.25, 28.85], [-112.32, 28.82], [-112.35, 28.75], [-112.25, 28.5], [-112.47, 27.97], [-113.0, 27.75], [-113.25, 27.85], [-113.5, 27.75], [-114.03, 27.97], [-114.25, 28.5], [-114.15, 28.75], [-114.18, 28.82], [-114.53, 28.97], [-114.7, 29.38], [-115.0, 29.25], [-115.53, 29.47], [-115.68, 29.82], [-116.03, 29.97], [-116.25, 30.5], [-116.03, 31.03], [-115.68, 31.18], [-115.65, 31.25], [-115.68, 31.32], [-116.03, 31.47], [-116.2, 31.88], [-116.5, 31.75], [-117.03, 31.97], [-117.25, 32.5], [-117.15, 32.75], [-117.25, 33.0], [-117.03, 33.53]], [[-114.35, 31.25], [-114.32, 31.18], [-113.97, 31.03], [-113.75, 30.5], [-113.87, 30.2], [-113.75, 30.15], [-113.5, 30.25], [-113.25, 30.15], [-113.18, 30.18], [-113.15, 30.25], [-113.18, 30.32], [-113.53, 30.47], [-113.75, 31.0], [-113.65, 31.25], [-113.68, 31.32], [-113.75, 31.35], [-114.0, 31.25], [-114.25, 31.35], [-114.32, 31.32], [-114.35, 31.25]]]]}, "2026-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-117.03, 33.53], [-116.5, 33.75], [-116.25, 33.65], [-116.0, 33.75], [-115.5, 33.54], [-115.18, 33.68], [-115.15, 33.75], [-115.25, 34.0], [-115.15, 34.25], [-115.25, 34.5], [-115.03, 35.03], [-114.5, 35.25], [-114.25, 35.15], [-114.0, 35.25], [-113.47, 35.03], [-113.32, 34.68], [-112.97, 34.53], 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-7.2049078752947935}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.469072303478677}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.50344111124673, 21.510108118881476, 21.60263736866142, 24.407901776026108]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.062685902913415, 11.76215769449874, 12.351285552978538, 21.18416239420577]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7536615650872216, -4.672136134751538, -4.978199739841995, -3.7918680626483643]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.541642514047737, -7.2049078752947935, -6.271715658906373, -4.693338278292401]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4387412457226858, -1.7470625674440483, -1.941368409361201, -1.4790414962154337]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.564071756399559, -2.269728459690121, -2.296310067990702, -1.8679732406932323]}}