{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:13.469480", "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-Apr-09_to_2026-Apr-14_36.0_20.0"}, "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": 2026040000259}, "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": "April 09 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 14 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": 310616.04213201045}, "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": ["Egypt", "Eritrea", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": 20.0}, "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": 36.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 37.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.03, 21.53], [33.25, 21.0], [33.15, 20.75], [33.25, 20.5], [33.03, 19.97], [32.5, 19.75], [32.25, 19.85], [32.0, 19.75], [31.47, 19.97], [31.25, 20.5], [31.47, 21.03], [31.82, 21.18], [31.97, 21.53], [32.5, 21.75], [33.03, 21.53]]], [[[33.75, 20.5], [33.85, 20.75], [33.75, 21.0], [33.85, 21.25], [33.75, 21.5], [33.85, 21.75], [33.75, 22.0], [33.85, 22.25], [33.75, 22.5], [33.85, 22.75], [33.75, 23.0], [33.97, 23.53], [34.5, 23.75], [35.03, 23.53], [35.25, 23.0], [35.15, 22.75], [35.25, 22.5], [35.15, 22.25], [35.25, 22.0], [35.15, 21.75], [35.18, 21.68], [35.53, 21.53], [35.68, 21.18], [35.75, 21.15], [36.0, 21.25], [36.25, 21.15], [36.5, 21.25], [37.03, 21.03], [37.25, 20.5], [37.04, 20.0], [37.25, 19.5], [37.15, 19.25], [37.25, 19.0], [37.03, 18.47], [36.5, 18.25], [35.97, 18.47], [35.8, 18.88], [35.68, 18.82], [35.53, 18.47], [35.0, 18.25], [34.47, 18.47], [34.32, 18.82], [33.97, 18.97], [33.75, 19.5], [33.85, 19.75], [33.75, 20.0], [33.85, 20.25], [33.75, 20.5]]]]}, "2026-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.85, 17.75], [29.75, 18.0], [29.97, 18.53], [30.32, 18.68], [30.47, 19.03], [30.82, 19.18], [30.85, 19.25], [30.75, 19.5], [30.85, 19.75], [30.75, 20.0], [30.97, 20.53], [31.32, 20.68], [31.47, 21.03], [31.82, 21.18], [31.97, 21.53], [32.5, 21.75], [33.03, 21.53], [33.25, 21.0], [33.15, 20.75], [33.25, 20.5], [33.47, 21.03], [33.82, 21.18], [33.85, 21.25], [33.75, 21.5], [33.85, 21.75], [33.75, 22.0], [33.85, 22.25], [33.75, 22.5], [33.85, 22.75], [33.75, 23.0], [33.97, 23.53], [34.5, 23.75], [35.03, 23.53], [35.25, 23.0], [35.15, 22.75], [35.25, 22.5], [35.15, 22.25], [35.25, 22.0], [35.15, 21.75], [35.18, 21.68], [35.53, 21.53], [35.68, 21.18], [35.75, 21.15], [36.0, 21.25], [36.25, 21.15], [36.5, 21.25], [37.03, 21.03], [37.25, 20.5], [37.15, 20.25], [37.25, 20.0], [37.15, 19.75], [37.25, 19.5], [37.15, 19.25], [37.25, 19.0], [37.03, 18.47], [36.5, 18.25], [37.03, 18.03], [37.2, 17.63], [37.5, 17.75], [38.03, 17.53], [38.25, 17.0], [38.03, 16.47], [37.5, 16.25], [37.0, 16.46], [36.68, 16.32], [36.53, 15.97], [36.0, 15.75], [35.75, 15.85], [35.5, 15.75], [35.25, 15.85], [35.0, 15.75], [34.47, 15.97], [34.32, 16.32], [34.0, 16.46], [33.68, 16.32], [33.53, 15.97], [33.0, 15.75], [32.75, 15.85], [32.5, 15.75], [32.0, 15.96], [31.5, 15.75], [30.97, 15.97], [30.82, 16.32], [30.75, 16.35], [30.5, 16.25], [29.97, 16.47], [29.75, 17.0], [29.85, 17.25], [29.75, 17.5], [29.85, 17.75]], [[33.13, 20.2], [33.25, 20.15], [33.32, 20.18], [33.35, 20.25], [33.25, 20.5], [33.13, 20.2]], [[36.2, 18.38], [36.15, 18.25], [36.18, 18.18], [36.25, 18.15], [36.5, 18.25], [36.2, 18.38]], [[33.85, 17.75], [33.75, 18.0], [33.65, 17.75], [33.68, 17.68], [33.8, 17.63], [33.85, 17.75]], [[33.85, 18.25], [33.75, 18.5], [33.65, 18.25], [33.75, 18.0], [33.85, 18.25]], [[33.93, 18.93], [33.68, 18.82], [33.65, 18.75], [33.75, 18.5], [33.93, 18.93]], [[32.32, 17.68], [32.35, 17.75], [32.32, 17.82], [32.25, 17.85], [32.0, 17.75], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.18, 17.82], [31.15, 17.75], [31.18, 17.68], [31.53, 17.53], [31.68, 17.18], [31.8, 17.13], [31.97, 17.53], [32.32, 17.68]]]]}, "2026-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.85, 17.75], [29.75, 18.0], [29.97, 18.53], [30.32, 18.68], [30.47, 19.03], [30.82, 19.18], [30.85, 19.25], [30.75, 19.5], [30.85, 19.75], [30.75, 20.0], [30.97, 20.53], [31.32, 20.68], [31.47, 21.03], [31.82, 21.18], [31.97, 21.53], [32.5, 21.75], [33.03, 21.53], [33.25, 21.0], [33.15, 20.75], [33.25, 20.5], [33.47, 21.03], [33.82, 21.18], [33.85, 21.25], [33.75, 21.5], [33.85, 21.75], [33.75, 22.0], [33.85, 22.25], [33.75, 22.5], [33.85, 22.75], [33.75, 23.0], [33.97, 23.53], [34.5, 23.75], [35.03, 23.53], [35.25, 23.0], [35.15, 22.75], [35.25, 22.5], [35.15, 22.25], [35.18, 22.18], [35.53, 22.03], [35.75, 21.5], [35.65, 21.25], [35.68, 21.18], [35.75, 21.15], [36.0, 21.25], [36.25, 21.15], [36.5, 21.25], [37.03, 21.03], [37.25, 20.5], [37.15, 20.25], [37.25, 20.0], [37.15, 19.75], [37.25, 19.5], [37.15, 19.25], [37.25, 19.0], [37.15, 18.75], [37.25, 18.5], [37.15, 18.25], [37.25, 18.0], [37.15, 17.75], [37.2, 17.63], [37.5, 17.75], [38.03, 17.53], [38.25, 17.0], [38.15, 16.75], [38.25, 16.5], [38.03, 15.97], [37.68, 15.82], [37.53, 15.47], [37.0, 15.25], [36.75, 15.35], [36.68, 15.32], [36.53, 14.97], [36.0, 14.75], [35.47, 14.97], [35.32, 15.32], [34.97, 15.47], [34.82, 15.82], [34.47, 15.97], [34.32, 16.32], [34.0, 16.46], [33.68, 16.32], [33.65, 16.25], [33.75, 16.0], [33.53, 15.47], [33.18, 15.32], [33.03, 14.97], [32.5, 14.75], [31.97, 14.97], [31.75, 15.5], [31.85, 15.75], [31.8, 15.88], [31.5, 15.75], [30.97, 15.97], [30.82, 16.32], [30.75, 16.35], [30.5, 16.25], [29.97, 16.47], [29.75, 17.0], [29.85, 17.25], [29.75, 17.5], [29.85, 17.75]], [[33.13, 20.2], [33.25, 20.15], [33.32, 20.18], [33.35, 20.25], [33.25, 20.5], [33.13, 20.2]], [[33.85, 17.75], [33.75, 18.0], [33.65, 17.75], [33.68, 17.68], [33.8, 17.63], [33.85, 17.75]], [[33.85, 18.25], [33.75, 18.5], [33.65, 18.25], [33.75, 18.0], [33.85, 18.25]], [[33.93, 18.93], [33.68, 18.82], [33.65, 18.75], [33.75, 18.5], [33.93, 18.93]], [[32.32, 17.68], [32.35, 17.75], [32.32, 17.82], [32.25, 17.85], [32.0, 17.75], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.18, 17.82], [31.15, 17.75], [31.18, 17.68], [31.53, 17.53], [31.68, 17.18], [31.8, 17.13], [31.97, 17.53], [32.32, 17.68]]]]}, "2026-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.85, 17.75], [29.75, 18.0], [29.97, 18.53], [30.32, 18.68], [30.47, 19.03], [30.82, 19.18], [30.85, 19.25], [30.75, 19.5], [30.85, 19.75], [30.75, 20.0], [30.97, 20.53], [31.5, 20.75], [31.75, 20.65], [32.0, 20.75], [32.53, 20.53], [32.68, 20.18], [32.75, 20.15], [33.0, 20.25], [33.25, 20.15], [33.32, 20.18], [33.35, 20.25], [33.25, 20.5], [33.47, 21.03], [33.82, 21.18], [33.96, 21.5], [33.75, 22.0], [33.97, 22.53], [34.5, 22.75], [35.03, 22.53], [35.18, 22.18], [35.53, 22.03], [35.75, 21.5], [35.65, 21.25], [35.68, 21.18], [35.75, 21.15], [35.82, 21.18], [35.97, 21.53], [36.5, 21.75], [37.03, 21.53], [37.25, 21.0], [37.15, 20.75], [37.25, 20.5], [37.15, 20.25], [37.25, 20.0], [37.15, 19.75], [37.25, 19.5], [37.15, 19.25], [37.18, 19.18], [37.53, 19.03], [37.75, 18.5], [37.53, 17.97], [37.18, 17.82], [37.15, 17.75], [37.2, 17.63], [37.5, 17.75], [38.03, 17.53], [38.25, 17.0], [38.15, 16.75], [38.25, 16.5], [38.03, 15.97], [37.68, 15.82], [37.53, 15.47], [37.0, 15.25], [36.75, 15.35], [36.68, 15.32], [36.53, 14.97], [36.0, 14.75], [35.47, 14.97], [35.32, 15.32], [35.25, 15.35], [35.0, 15.25], [34.47, 15.47], [34.32, 15.82], [34.25, 15.85], [34.0, 15.75], [33.7, 15.88], [33.53, 15.47], [33.18, 15.32], [33.03, 14.97], [32.5, 14.75], [31.97, 14.97], [31.75, 15.5], [31.85, 15.75], [31.8, 15.88], [31.5, 15.75], [30.97, 15.97], [30.82, 16.32], [30.75, 16.35], [30.5, 16.25], [29.97, 16.47], [29.75, 17.0], [29.85, 17.25], [29.75, 17.5], [29.85, 17.75]], [[32.32, 17.68], [32.35, 17.75], [32.32, 17.82], [32.25, 17.85], [32.0, 17.75], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.18, 17.82], [31.15, 17.75], [31.18, 17.68], [31.53, 17.53], [31.68, 17.18], [31.8, 17.13], [31.97, 17.53], [32.32, 17.68]]]]}, "2026-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.85, 16.25], [31.75, 16.5], [31.85, 16.75], [31.75, 17.0], [31.97, 17.53], [32.32, 17.68], [32.35, 17.75], [32.25, 18.0], [32.35, 18.25], [32.25, 18.5], [32.47, 19.03], [32.82, 19.18], [32.85, 19.25], [32.75, 19.5], [32.97, 20.03], [33.32, 20.18], [33.35, 20.25], [33.25, 20.5], [33.47, 21.03], [34.0, 21.25], [34.25, 21.15], [34.32, 21.18], [34.35, 21.25], [34.25, 21.5], [34.47, 22.03], [35.0, 22.25], [35.53, 22.03], [35.75, 21.5], [35.65, 21.25], [35.68, 21.18], [35.75, 21.15], [35.82, 21.18], [35.97, 21.53], [36.5, 21.75], [37.03, 21.53], [37.25, 21.0], [37.15, 20.75], [37.25, 20.5], [37.15, 20.25], [37.25, 20.0], [37.15, 19.75], [37.25, 19.5], [37.15, 19.25], [37.18, 19.18], [37.53, 19.03], [37.75, 18.5], [37.53, 17.97], [37.18, 17.82], [37.15, 17.75], [37.2, 17.63], [37.5, 17.75], [38.03, 17.53], [38.25, 17.0], [38.15, 16.75], [38.25, 16.5], [38.03, 15.97], [37.68, 15.82], [37.53, 15.47], [37.0, 15.25], [36.75, 15.35], [36.68, 15.32], [36.53, 14.97], [36.0, 14.75], [35.47, 14.97], [35.32, 15.32], [35.25, 15.35], [35.0, 15.25], [34.47, 15.47], [34.32, 15.82], [34.25, 15.85], [34.0, 15.75], [33.7, 15.88], [33.53, 15.47], [33.18, 15.32], [33.03, 14.97], [32.5, 14.75], [31.97, 14.97], [31.75, 15.5], [31.85, 15.75], [31.75, 16.0], [31.85, 16.25]]]]}, "2026-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.97, 17.53], [32.32, 17.68], [32.35, 17.75], [32.25, 18.0], [32.35, 18.25], [32.25, 18.5], [32.47, 19.03], [32.82, 19.18], [32.85, 19.25], [32.75, 19.5], [32.97, 20.03], [33.5, 20.25], [33.75, 20.15], [34.0, 20.25], [34.53, 20.03], [34.68, 19.68], [34.75, 19.65], [34.82, 19.68], [34.97, 20.03], [35.32, 20.18], [35.35, 20.25], [35.25, 20.5], [35.47, 21.03], [35.82, 21.18], [35.97, 21.53], [36.5, 21.75], [37.03, 21.53], [37.25, 21.0], [37.15, 20.75], [37.25, 20.5], [37.15, 20.25], [37.25, 20.0], [37.15, 19.75], [37.25, 19.5], [37.15, 19.25], [37.18, 19.18], [37.53, 19.03], [37.75, 18.5], [37.53, 17.97], [37.0, 17.75], [36.75, 17.85], [36.5, 17.75], [36.2, 17.88], [36.15, 17.75], [36.25, 17.5], [36.15, 17.25], [36.25, 17.0], [36.15, 16.75], [36.25, 16.5], [36.03, 15.97], [35.68, 15.82], [35.53, 15.47], [35.0, 15.25], [34.47, 15.47], [34.32, 15.82], [34.25, 15.85], [34.0, 15.75], [33.5, 15.96], [33.0, 15.75], [32.75, 15.85], [32.5, 15.75], [31.97, 15.97], [31.75, 16.5], [31.85, 16.75], [31.75, 17.0], [31.97, 17.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.986669021882108}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8385207814827442}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.478744337293847, 25.112244076199033, 25.67820140824341, 25.94917048136398, 26.09502454025335, 26.47910927666561]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.33159535725912, 21.724017079671228, 21.799061075846396, 20.947700754801474, 20.865213012695335, 21.487493133544945]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9855090823649846, -4.001128241833773, -3.725393434321999, -3.786842768171635, -3.939677865805132, -3.6618842568879053]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.986669021882108, -4.829033439528075, -4.772808117631314, -4.424151986862739, -4.478668241529306, -4.593402390664437]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.481550777062283, -1.4965581685837943, -1.4252662211218492, -1.5212884679197238, -1.6967978964000061, -1.5925998875379799]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6842375786880432, -1.9180979444415511, -1.6320580946110554, -1.7871267916177194, -1.944200938878264, -1.867237740600009]}}