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Due to scheduled maintenance, many NCEI systems will be unavailable on Saturday, August 24 from 11:30 AM ET to 1:30 PM ET. We apologize for any inconvenience.

Derived / Other Model Data

Important Notice: 11.22.2017
The NOMADS Ensemble Probability Tool was retired on 11/22/2017
A National Weather Service graphical sea state analysis over the Atlantic Ocean

A National Weather Service graphical sea state analysis over the Atlantic Ocean. This image was downloaded through NOMADS.

The following other datasets and product-generating services are available through the National Operational Model Archive and Distribution System (NOMADS) or NCEI's Hierarchical Data Storage System (HDSS).

  • Service Records Retention System (SRRS)
    SRRS is a store of weather observations, summaries, forecasts, warnings, and advisories generated by the U.S. National Weather Service (NWS) for public use.
  • NOMADS Ensemble Probability Tool
    The NOMADS Ensemble Probability Tool was a tool that allowed a user to query the Global Ensemble Forecast System (GEFS) to determine the probability that a set of forecast conditions will occur at a given location using all of the 21 separate GEFS ensemble members. It was decommissioned on 11/22/2017.
  • National Digital Forecast Database (NDFD)
    NDFD are gridded forecasts created from weather data collected by NWS field offices and processed through the National Centers for Environmental Prediction. NDFD data are accessed by World Meteorological Organization header or by date range.
  • National Digital Guidance Database (NDGD)
    NDGD consists of forecasts, observations, model probabilities, climatological normals, and other digital data that complement the NDFD.