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 |
