{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:28.657320", "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-18_to_2026-Apr-27_128.5_-12.5"}, "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": 2026040000534}, "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 18 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 214884.6233143485}, "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": ["Australia", "Timor-Leste"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "S.E.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Australia"]}, "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": ["Arafura Sea", "Banda Sea", "Indian Ocean", "Timor Sea"]}, "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": -12.5}, "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": 128.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "128.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 132.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -12.0], [124.97, -11.47], [125.5, -11.25], [125.75, -11.35], [125.82, -11.32], [125.97, -10.97], [126.32, -10.82], [126.47, -10.47], [127.0, -10.25], [127.53, -10.47], [127.75, -11.0], [127.65, -11.25], [127.68, -11.32], [127.8, -11.37], [127.97, -10.97], [128.5, -10.75], [128.75, -10.85], [128.82, -10.82], [128.97, -10.47], [129.5, -10.25], [129.75, -10.35], [130.0, -10.25], [130.25, -10.35], [130.5, -10.25], [131.03, -10.47], [131.25, -11.0], [131.15, -11.25], [131.25, -11.5], [131.03, -12.03], [130.63, -12.2], [130.75, -12.5], [130.65, -12.75], [130.75, -13.0], [130.53, -13.53], [130.0, -13.75], [129.7, -13.63], [129.53, -14.03], [129.18, -14.18], [129.03, -14.53], [128.5, -14.75], [128.25, -14.65], [128.0, -14.75], [127.47, -14.53], [127.32, -14.18], [126.97, -14.03], [126.82, -13.68], [126.5, -13.54], [126.0, -13.75], [125.47, -13.53], [125.25, -13.0], [125.38, -12.7], [124.97, -12.53], [124.75, -12.0]]]]}, "2026-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -12.0], [124.97, -11.47], [125.5, -11.25], [125.75, -11.35], [125.82, -11.32], [125.97, -10.97], [126.32, -10.82], [126.47, -10.47], [127.0, -10.25], [127.25, -10.35], [127.5, -10.25], [128.03, -10.47], [128.18, -10.82], [128.25, -10.85], [128.5, -10.75], [128.75, -10.85], [128.82, -10.82], [128.97, -10.47], [129.5, -10.25], [129.75, -10.35], [130.0, -10.25], [130.25, -10.35], [130.5, -10.25], [131.03, -10.47], [131.25, -11.0], [131.15, -11.25], [131.25, -11.5], [131.03, -12.03], [130.63, -12.2], [130.75, -12.5], [130.65, -12.75], [130.75, -13.0], [130.53, -13.53], [130.0, -13.75], [129.7, -13.63], [129.53, -14.03], [129.18, -14.18], [129.03, -14.53], [128.5, -14.75], [128.25, -14.65], [128.0, -14.75], [127.47, -14.53], [127.32, -14.18], [127.25, -14.15], [127.0, -14.25], [126.75, -14.15], [126.5, -14.25], [125.97, -14.03], [125.82, -13.68], [125.47, -13.53], [125.25, -13.0], [125.35, -12.75], [125.32, -12.68], [124.97, -12.53], [124.75, -12.0]]]]}, "2026-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -12.0], [124.97, -11.47], [125.5, -11.25], [125.75, -11.35], [125.82, -11.32], [125.97, -10.97], [126.32, -10.82], [126.47, -10.47], [127.0, -10.25], [127.25, -10.35], [127.32, -10.32], [127.47, -9.97], [128.0, -9.75], [128.53, -9.97], [128.68, -10.32], [128.75, -10.35], [129.0, -10.25], [129.25, -10.35], [129.5, -10.25], [129.75, -10.35], [129.82, -10.32], [129.97, -9.97], [130.5, -9.75], [130.75, -9.85], [131.0, -9.75], [131.25, -9.85], [131.5, -9.75], [131.75, -9.85], [132.0, -9.75], [132.53, -9.97], [132.75, -10.5], [132.53, -11.03], [132.13, -11.2], [132.25, -11.5], [132.03, -12.03], [131.5, -12.25], [131.25, -12.15], [131.0, -12.25], [130.75, -12.15], [130.63, -12.2], [130.75, -12.5], [130.65, -12.75], [130.75, -13.0], [130.53, -13.53], [130.0, -13.75], [129.75, -13.65], [129.68, -13.68], [129.53, -14.03], [129.18, -14.18], [129.03, -14.53], [128.5, -14.75], [128.25, -14.65], [128.0, -14.75], [127.47, -14.53], [127.32, -14.18], [127.25, -14.15], [127.0, -14.25], [126.75, -14.15], [126.5, -14.25], [125.97, -14.03], [125.82, -13.68], [125.47, -13.53], [125.25, -13.0], [125.35, -12.75], [125.32, -12.68], [124.97, -12.53], [124.75, -12.0]]]]}, "2026-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -11.47], [125.82, -11.32], [125.97, -10.97], [126.32, -10.82], [126.35, -10.75], [126.25, -10.5], [126.47, -9.97], [127.0, -9.75], [127.25, -9.85], [127.5, -9.75], [127.75, -9.85], [128.0, -9.75], [128.53, -9.97], [128.68, -10.32], [128.75, -10.35], [129.0, -10.25], [129.25, -10.35], [129.5, -10.25], [129.75, -10.35], [129.82, -10.32], [129.97, -9.97], [130.5, -9.75], [130.75, -9.85], [131.0, -9.75], [131.25, -9.85], [131.5, -9.75], [131.75, -9.85], [132.0, -9.75], [132.53, -9.97], [132.75, -10.5], [132.53, -11.03], [132.13, -11.2], [132.25, -11.5], [132.03, -12.03], [131.5, -12.25], [131.25, -12.15], [131.0, -12.25], [130.57, -12.07], [130.75, -12.5], [130.65, -12.75], [130.75, -13.0], [130.53, -13.53], [130.0, -13.75], [129.75, -13.65], [129.68, -13.68], [129.53, -14.03], [129.0, -14.25], [128.75, -14.15], [128.5, -14.25], [128.25, -14.15], [128.0, -14.25], [127.75, -14.15], [127.5, -14.25], [127.25, -14.15], [127.0, -14.25], [126.75, -14.15], [126.5, -14.25], [125.97, -14.03], [125.75, -13.5], [125.85, -13.25], [125.82, -13.18], [125.47, -13.03], [125.25, -12.5], [125.35, -12.25], [125.25, -12.0], [125.47, -11.47]]]]}, "2026-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.25, -12.0], [125.47, -11.47], [125.82, -11.32], [125.97, -10.97], [126.32, -10.82], [126.35, -10.75], [126.32, -10.68], [125.97, -10.53], [125.75, -10.0], [125.97, -9.47], [126.5, -9.25], [126.75, -9.35], [127.0, -9.25], [127.25, -9.35], [127.5, -9.25], [128.03, -9.47], [128.18, -9.82], [128.53, -9.97], [128.68, -10.32], [128.75, -10.35], [129.0, -10.25], [129.25, -10.35], [129.5, -10.25], [129.75, -10.35], [129.82, -10.32], [129.97, -9.97], [130.5, -9.75], [130.75, -9.85], [131.0, -9.75], [131.25, -9.85], [131.5, -9.75], [131.75, -9.85], [132.0, -9.75], [132.53, -9.97], [132.75, -10.5], [132.53, -11.03], [132.13, -11.2], [132.25, -11.5], [132.03, -12.03], [131.5, -12.25], [131.25, -12.15], [131.0, -12.25], [130.57, -12.07], [130.75, -12.5], [130.53, -13.03], [130.18, -13.18], [130.03, -13.53], [129.5, -13.75], [129.25, -13.65], [129.0, -13.75], [128.75, -13.65], [128.5, -13.75], [128.25, -13.65], [128.0, -13.75], [127.75, -13.65], [127.5, -13.75], [126.97, -13.53], [126.82, -13.18], [126.75, -13.15], [126.5, -13.25], [125.97, -13.03], [125.82, -12.68], [125.47, -12.53], [125.25, -12.0]], [[130.32, -11.68], [130.25, -11.65], [130.18, -11.68], [130.13, -11.8], [130.43, -11.93], [130.32, -11.68]]]]}, "2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, -8.97], [126.5, -8.75], [127.03, -8.97], [127.18, -9.32], [127.25, -9.35], [127.5, -9.25], [128.03, -9.47], [128.18, -9.82], [128.53, -9.97], [128.75, -10.5], [128.53, -11.03], [128.0, -11.25], [127.75, -11.15], [127.5, -11.25], [127.25, -11.15], [127.0, -11.25], [126.47, -11.03], [126.32, -10.68], [125.97, -10.53], [125.75, -10.0], [125.85, -9.75], [125.75, -9.5], [125.97, -8.97]]]]}, "2026-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, -8.97], [126.32, -8.82], [126.35, -8.75], [126.25, -8.5], [126.47, -7.97], [127.0, -7.75], [127.25, -7.85], [127.5, -7.75], [128.03, -7.97], [128.25, -8.5], [128.03, -9.03], [127.68, -9.18], [127.63, -9.3], [128.03, -9.47], [128.25, -10.0], [128.03, -10.53], [127.5, -10.75], [127.25, -10.65], [127.0, -10.75], [126.75, -10.65], [126.5, -10.75], [125.97, -10.53], [125.75, -10.0], [125.85, -9.75], [125.75, -9.5], [125.97, -8.97]]]]}, "2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, -8.97], [126.32, -8.82], [126.35, -8.75], [126.32, -8.68], [125.97, -8.53], [125.75, -8.0], [125.97, -7.47], [126.5, -7.25], [126.75, -7.35], [127.0, -7.25], [127.53, -7.47], [127.68, -7.82], [128.03, -7.97], [128.25, -8.5], [128.03, -9.03], [127.68, -9.18], [127.54, -9.5], [127.75, -10.0], [127.53, -10.53], [127.0, -10.75], [126.75, -10.65], [126.5, -10.75], [125.97, -10.53], [125.75, -10.0], [125.85, -9.75], [125.75, -9.5], [125.97, -8.97]]]]}, "2026-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.75, -8.0], [125.97, -7.47], [126.5, -7.25], [126.75, -7.35], [127.0, -7.25], [127.53, -7.47], [127.68, -7.82], [128.03, -7.97], [128.25, -8.5], [128.03, -9.03], [127.68, -9.18], [127.53, -9.53], [127.0, -9.75], [126.47, -9.53], [126.25, -9.0], [126.35, -8.75], [126.32, -8.68], [125.97, -8.53], [125.75, -8.0]]]]}, "2026-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, -8.53], [125.75, -8.0], [125.97, -7.47], [126.5, -7.25], [126.75, -7.35], [127.0, -7.25], [127.53, -7.47], [127.75, -8.0], [127.53, -8.53], [127.0, -8.75], [126.75, -8.65], [126.5, -8.75], [125.97, -8.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.8013979801348228}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1987207691647355}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.184120686848928, 27.098786078559044, 27.09489568074548, 27.193205167536178, 27.14519063530247, 26.82428330920993, 26.40517614455456, 26.22630589803066, 26.048622131347656, 26.35756581624355]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.006372070312523, 26.282556152343773, 26.085846201578818, 26.367620086669945, 26.45361989339193, 26.602557118733728, 24.591106669108115, 24.395759836832724, 24.479269917805993, 26.14752349853518]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2819696426757559, -1.3669024944686388, -1.2613056955910358, -1.1419707985464362, -1.0712402669161876, -1.0272630483427747, -0.9606328689494603, -1.044365916046054, -0.9462354427282662, -0.9150424665202763]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6203508810614835, -1.8013979801348228, -1.6577567746402906, -1.45170384721024, -1.2324982011539305, -1.297408062103898, -1.097544453080161, -1.16074730096625, -0.9916814820532522, -1.067224978589934]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6363653082004888, -1.8392813977246893, -1.741240475538462, -1.6160590440788611, -1.5424710195238054, -1.5630250725147117, -1.4716472572429653, -1.6530162521505074, -1.6174100578538506, -1.6277684574329094]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9729634508878844, -2.449652217651888, -2.2199858196026474, -1.923649123067868, -1.8523677128620726, -1.9731758024037394, -1.6674846244286066, -2.0453354600272213, -1.9730244357588405, -1.7461114944331582]}}