Investigate rainfall context and the documented warning timeline around the September 2024 floods. This point is not a measurement of the whole Bagmati basin.
What rainfall evidence and official bulletins preceded the September 2024 Nepal floods, and what would a properly validated early-awareness workflow require?
This chronology is reconstructed from later reports. It is not a run of Iris before the event and does not demonstrate warning lead time.
DHM's later report records a bulletin on 23 September, updated on 25 September. This is retrospective evidence of an existing official forecast, not a warning produced by Iris.
Government of Nepal · Department of Hydrology and Meteorology · document dated 2024-10-08 ↗The later DHM report describes a special bulletin on 26 September and identifies several basins at elevated flood risk. Independent issue-time archives are still required for a hindsight-free replay.
Government of Nepal · Department of Hydrology and Meteorology · document dated 2024-10-08 ↗Report dates do not prove public availability before the event. A hindsight-free forecast evaluation needs archived forecasts and original issue times.
Daily mean rate · mm/day · UTC · coarse-grid point sample