NOAA National Water Model Retrospective Dataset
Open multi-decade historical NWM simulation archive, versioned by NWM release and distributed in NetCDF and Zarr/cloud files. RTOUT terrain-routing files directly emit modelled ponded-water depth every three hours. Retr…
Questions this answers
2 · best fit firstVersioned multi-decade three-hourly ponded-water grids support thresholded modeled recurrence under explicit geometry/window/version; they are reconstructions, not observations.
Versioned public NWM retrospective files provide three-hourly geospatial RTOUT ponded-water depth for historical valid times. Retain archive release, model configuration, initialization/output-valid times, and code version, and characterize the result as simulated ponding without stream-gauge assimilation rather than direct observed inundation.
Fields it delivers
1 fieldThe NOAA Big Data Program identifies this retrospective archive as the CONUS dataset. The structured footprint enumerates the contiguous states and District of Columbia; it does not imply Alaska, Hawaii, or separately coded territories.
The cited agency/open-data terms and download or API page provide direct public access without an order, subscription, or payment step. An ordinary business buyer can therefore use the standing no-cost route, subject to the linked terms.
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