{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-22 01:20:17.056374", "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-Jul-08_to_2026-Jul-13_232.5_51.5"}, "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": 2026070000322}, "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": true}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "July 08 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 13 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": 85056.06417739994}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-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": ["North Pacific Ocean", "The Coastal Waters of Southeast Alaska and British Columbia"]}, "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": 51.5}, "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": 232.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "232.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 230.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 234.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 55.03], [-129.5, 55.25], [-129.25, 55.15], [-129.0, 55.25], [-128.75, 55.15], [-128.5, 55.25], [-128.25, 55.15], [-128.0, 55.25], [-127.47, 55.03], [-127.32, 54.68], [-126.97, 54.53], [-126.82, 54.18], [-126.47, 54.03], [-126.32, 53.68], [-125.97, 53.53], [-125.75, 53.0], [-125.85, 52.75], [-125.75, 52.5], [-125.97, 51.97], [-126.5, 51.75], [-126.75, 51.85], [-126.82, 51.82], [-126.85, 51.75], [-126.82, 51.68], [-126.47, 51.53], [-126.25, 51.0], [-126.47, 50.47], [-127.0, 50.25], [-127.3, 50.38], [-127.47, 49.97], [-128.0, 49.75], [-128.53, 49.97], [-128.75, 50.5], [-128.54, 51.0], [-128.75, 51.5], [-128.65, 51.75], [-128.68, 51.82], [-129.03, 51.97], [-129.25, 52.5], [-129.15, 52.75], [-129.18, 52.82], [-129.53, 52.97], [-129.68, 53.32], [-130.03, 53.47], [-130.25, 54.0], [-130.15, 54.25], [-130.25, 54.5], [-130.03, 55.03]]]]}, "2026-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 55.03], [-129.5, 55.25], [-129.25, 55.15], [-129.0, 55.25], [-128.75, 55.15], [-128.5, 55.25], [-128.25, 55.15], [-128.0, 55.25], [-127.47, 55.03], [-127.32, 54.68], [-126.97, 54.53], [-126.82, 54.18], [-126.47, 54.03], [-126.32, 53.68], [-125.97, 53.53], [-125.75, 53.0], [-125.85, 52.75], [-125.75, 52.5], [-125.97, 51.97], [-126.32, 51.82], [-126.35, 51.75], [-126.32, 51.68], [-125.97, 51.53], [-125.75, 51.0], [-125.97, 50.47], [-126.37, 50.3], [-126.25, 50.0], [-126.47, 49.47], [-127.0, 49.25], [-127.25, 49.35], [-127.5, 49.25], [-128.03, 49.47], [-128.18, 49.82], [-128.53, 49.97], [-128.75, 50.5], [-128.54, 51.0], [-128.75, 51.5], [-128.65, 51.75], [-128.68, 51.82], [-129.03, 51.97], [-129.25, 52.5], [-129.15, 52.75], [-129.18, 52.82], [-129.53, 52.97], [-129.68, 53.32], [-130.03, 53.47], [-130.25, 54.0], [-130.15, 54.25], [-130.25, 54.5], [-130.03, 55.03]]]]}, "2026-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 55.03], [-129.5, 55.25], [-129.25, 55.15], [-129.0, 55.25], [-128.75, 55.15], [-128.5, 55.25], [-128.25, 55.15], [-128.0, 55.25], [-127.47, 55.03], [-127.32, 54.68], [-126.97, 54.53], [-126.82, 54.18], [-126.47, 54.03], [-126.32, 53.68], [-125.97, 53.53], [-125.75, 53.0], [-125.85, 52.75], [-125.75, 52.5], [-125.97, 51.97], [-126.32, 51.82], [-126.35, 51.75], [-126.32, 51.68], [-125.97, 51.53], [-125.75, 51.0], [-125.96, 50.5], [-125.75, 50.0], [-125.85, 49.75], [-125.75, 49.5], [-125.97, 48.97], [-126.5, 48.75], [-127.03, 48.97], [-127.18, 49.32], [-127.25, 49.35], [-127.5, 49.25], [-128.03, 49.47], [-128.18, 49.82], [-128.53, 49.97], [-128.75, 50.5], [-128.54, 51.0], [-128.68, 51.32], [-129.03, 51.47], [-129.18, 51.82], [-129.53, 51.97], [-129.75, 52.5], [-129.54, 53.0], [-129.68, 53.32], [-130.03, 53.47], [-130.25, 54.0], [-130.15, 54.25], [-130.25, 54.5], [-130.03, 55.03]]]]}, "2026-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.75, 52.5], [-129.53, 53.03], [-129.0, 53.25], [-128.75, 53.15], [-128.5, 53.25], [-128.2, 53.13], [-128.03, 53.53], [-127.5, 53.75], [-126.97, 53.53], [-126.75, 53.0], [-126.85, 52.75], [-126.82, 52.68], [-126.47, 52.53], [-126.25, 52.0], [-126.35, 51.75], [-126.32, 51.68], [-126.25, 51.65], [-126.0, 51.75], [-125.47, 51.53], [-125.25, 51.0], [-125.35, 50.75], [-125.25, 50.5], [-125.35, 50.25], [-125.25, 50.0], [-125.47, 49.47], [-125.82, 49.32], [-125.97, 48.97], [-126.5, 48.75], [-127.03, 48.97], [-127.18, 49.32], [-127.25, 49.35], [-127.5, 49.25], [-128.03, 49.47], [-128.18, 49.82], [-128.53, 49.97], [-128.75, 50.5], [-128.54, 51.0], [-128.68, 51.32], [-129.03, 51.47], [-129.18, 51.82], [-129.53, 51.97], [-129.75, 52.5]]]]}, "2026-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.75, 52.5], [-129.53, 53.03], [-129.0, 53.25], [-128.47, 53.03], [-128.32, 52.68], [-128.25, 52.65], [-128.18, 52.68], [-128.15, 52.75], [-128.25, 53.0], [-128.03, 53.53], [-127.5, 53.75], [-126.97, 53.53], [-126.75, 53.0], [-126.85, 52.75], [-126.82, 52.68], [-126.47, 52.53], [-126.25, 52.0], [-126.35, 51.75], [-126.32, 51.68], [-126.25, 51.65], [-126.0, 51.75], [-125.47, 51.53], [-125.25, 51.0], [-125.35, 50.75], [-125.25, 50.5], [-125.35, 50.25], [-125.25, 50.0], [-125.47, 49.47], [-125.82, 49.32], [-125.97, 48.97], [-126.5, 48.75], [-127.03, 48.97], [-127.18, 49.32], [-127.25, 49.35], [-127.5, 49.25], [-128.03, 49.47], [-128.18, 49.82], [-128.53, 49.97], [-128.75, 50.5], [-128.54, 51.0], [-128.68, 51.32], [-129.03, 51.47], [-129.18, 51.82], [-129.53, 51.97], [-129.75, 52.5]]]]}, "2026-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.97, 53.03], [-126.82, 52.68], [-126.47, 52.53], [-126.25, 52.0], [-126.35, 51.75], [-126.32, 51.68], [-126.25, 51.65], [-126.0, 51.75], [-125.47, 51.53], [-125.25, 51.0], [-125.35, 50.75], [-125.25, 50.5], [-125.35, 50.25], [-125.25, 50.0], [-125.47, 49.47], [-126.0, 49.25], [-126.25, 49.35], [-126.5, 49.25], [-127.03, 49.47], [-127.18, 49.82], [-127.5, 49.96], [-128.0, 49.75], [-128.53, 49.97], [-128.75, 50.5], [-128.53, 51.03], [-128.12, 51.2], [-128.25, 51.5], [-128.15, 51.75], [-128.25, 52.0], [-128.15, 52.25], [-128.25, 52.5], [-128.03, 53.03], [-127.5, 53.25], [-126.97, 53.03]]], [[[-129.53, 51.97], [-129.75, 52.5], [-129.53, 53.03], [-129.0, 53.25], [-128.47, 53.03], [-128.25, 52.5], [-128.47, 51.97], [-129.0, 51.75], [-129.53, 51.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.544569966910274}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.903983548488119}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.805047183566614, 9.17099193996853, 9.50760728789544, 10.657786729600787, 10.565029398600245, 10.569205729166697]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.912252044677757, 5.839482879638695, 6.742522176106775, 7.778843180338583, 7.086676534016931, 7.685123697916708]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3090200283218034, -3.1278709391729205, -2.930135565732072, -2.5218603711867, -2.6148401044337723, -2.5398490352760255]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.4603427147596335, -4.544569966910274, -3.8973376603595966, -3.5887672527720156, -4.249526801721174, -3.8609047163857326]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3857454969105238, -1.3635642767477254, -1.3573137704294789, -1.4088027044944214, -1.3986331740861415, -1.2742605099928785]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5874221851894184, -1.657873266680458, -1.6995777954161708, -1.8179934834744675, -1.7394233860364046, -1.453422378354419]}}