Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • North American Mesoscale Forecast System (NAM) [12 km]

    Metadata Updated: December 12, 2025

    The North American Mesoscale Forecast System (NAM) is one of the major regional weather forecast models run by the National Centers for Environmental Prediction (NCEP) for producing weather forecasts. Dozens of weather parameters are available from the NAM grids, from temperature and precipitation to lightning and turbulent kinetic energy. The NAM generates multiple grids (or domains) of weather forecasts over the North American continent at various horizontal resolutions. High-resolution forecasts are generated within the NAM using additional numerical weather models. These high-resolution forecast windows are generated over fixed regions and are occasionally run to follow significant weather events, like hurricanes. This dataset contains a 12 km horizontal resolution Lambert Conformal grid covering the Continental United States (CONUS) domain. It is run four times daily at 00z, 06z, 12z and 18z out to 84 hours with a 1 hour temporal resolution.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date December 4, 2025
    Metadata Created Date December 12, 2025
    Metadata Updated Date December 12, 2025
    Reference Date(s) March 1, 2004 (publication)
    Frequency Of Update daily

    Metadata Source

    Harvested from ncdc

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date December 4, 2025
    Metadata Created Date December 12, 2025
    Metadata Updated Date December 12, 2025
    Reference Date(s) March 1, 2004 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact); DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
    Contact Email
    Guid gov.noaa.ncdc:C00630
    Access Constraints
    Bbox East Long -49.4
    Bbox North Lat 61.0
    Bbox South Lat 12.1
    Bbox West Long -152.9
    Coupled Resource
    Frequency Of Update daily
    Harvest Object Id cac9a719-a2a9-453b-a951-ef85c6ac5f3a
    Harvest Source Id 2cb3ef77-1683-4c2a-9119-dc65e50917c6
    Harvest Source Title ncdc
    Licence
    Lineage
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-152.9, 12.1], [-49.4, 12.1], [-49.4, 61.0], [-152.9, 61.0], [-152.9, 12.1]]]}
    Progress
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2004-03-01

    Didn't find what you're looking for? Suggest a dataset here.