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National Digital Forecast Database

The National Digital Forecast Database (NDFD) is a suite of products generated by the National Weather Service (NWS) using data from regional NWS Weather Forecast Offices (WFOs) and the National Centers for Environmental Prediction (NCEP). The database provides access to forecasts produced at WFOs, as well as NCEP gridded model data enhanced by WFO staff. The NWS uses these products to make text, graphic, and digital products for emergency managers and the public. The NDFD also provides data for commercial weather companies to generate their own products based on NWS forecasts.

Access Methods

NDFD products are available through NCEI model data services. For data prior to October 6, 2008 use the NCEI Archive Information Request System (AIRS). Requests are limited to one day’s worth of data at a time due to size and processing requirements. AIRS access is recommended for users wanting to obtain many days of NDFD data.

The NOAA Big Data Program also provides access to NDFD data from April 16, 2020 to present organized by WMO element in the AWS Open Data Registry for NDFD.

Product Grid/Scale Period of Record Model Cycle Output Timestep Data Access Links
NDFD Various Approx. ten years to present online Daily, various cycles Various
NDFD - By WMO Header Various 6 Jun 2004–Present Daily, various cycles Various AIRS
NDFD Daily Tar Files Various 6 Jun 2004–5 Oct 2008 Daily, various cycles Various AIRS