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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.

ProductGrid/ScalePeriod of RecordModel CycleOutput TimestepData Access Links
NDFDVariousApprox. ten years to present onlineDaily, various cyclesVarious
NDFD - By WMO HeaderVarious6 Jun 2004–PresentDaily, various cyclesVariousAIRS
NDFD Daily Tar FilesVarious6 Jun 2004–5 Oct 2008Daily, various cyclesVariousAIRS