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

Meso-ETA [12 km]

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.
Cite this dataset when used as a source.
  • NCEI DSI 6173
  • gov.noaa.ncdc:C00630
Download Data
Distribution Formats
  • GRIB 1 (Version: 1)
    • File Specification: http://www.nco.ncep.noaa.gov/pmb/docs/on388/
    • File Compression:
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
nomads.ncdc@noaa.gov
Coverage Description
Time Period 2004-03-01 to Present
Spatial Bounding Box Coordinates
N: 61.0
S: 12.1
E: -49.4
W: -152.9
Spatial Coverage Map
General Documentation
Publication Dates
  • publication: 2004-03-01
Data Presentation Form Digital model - multi-dimensional digital representation of a feature, process, etc.
Dataset Progress Status Ongoing - data is continually being updated
Data Update Frequency Daily
Purpose To provide mesoscale guidance to public and private sector meteorologists.
Cited Authors
  • DOC/NOAA/NWS/NCEP/EMC > Environmental Modeling Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Originators
  • DOC/NOAA/NWS/NCEP/EMC > Environmental Modeling Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Distributors
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Atmosphere > Air Quality > Visibility
  • Atmosphere > Altitude > Geopotential Height
  • Atmosphere > Altitude > Planetary Boundary Layer Height
  • Atmosphere > Altitude > Tropopause
  • Atmosphere > Altitude > Sea Ice Concentration
  • Atmosphere > Altitude > Albedo
  • Atmosphere > Altitude > Land Cover
  • Atmosphere > Altitude > Soil Moisture/Water Content
  • Atmosphere > Altitude > Soil Porosity
  • Atmosphere > Altitude > Soil Temperature
  • Atmosphere > Altitude > Land Surface Temperature
  • Atmosphere > Altitude > Sea Surface Temperature
  • Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements
  • Atmosphere > Atmospheric Pressure > Pressure Thickness
  • Atmosphere > Atmospheric Pressure > Sea Level Pressure
  • Atmosphere > Atmospheric Pressure > Surface Pressure
  • Atmosphere > Atmospheric Radiation > Albedo
  • Atmosphere > Atmospheric Radiation > Incoming Solar Radiation
  • Atmosphere > Atmospheric Radiation > Longwave Radiation
  • Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation
  • Atmosphere > Atmospheric Radiation > Shortwave Radiation
  • Atmosphere > Atmospheric Radiation > Solar Radiation
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature
  • Atmosphere > Atmospheric Temperature > Atmospheric Stability
  • Atmosphere > Atmospheric Temperature > Boundary Layer Temperature
  • Atmosphere > Atmospheric Temperature > Dew Point Temperature
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Skin Temperature
  • Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature
  • Earth Science > Atmosphere > Atmospheric Temperature > Upper Air Temperature
  • Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Dew Point Temperature
  • Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Evaporation
  • Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Evapotranspiration
  • Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity
  • Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Total Precipitable Water
  • Atmosphere > Atmospheric Water Vapor > Water Vapor
  • Atmosphere > Atmospheric Water Vapor > Water Vapor Profiles
  • Atmosphere > Atmospheric Winds > Boundary Layer Winds
  • Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Convection
  • Atmosphere > Atmospheric Winds > Surface Winds
  • Atmosphere > Atmospheric Winds > Upper Level Winds
  • Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vertical Wind Velocity/Speed
  • Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vorticity
  • Atmosphere > Atmospheric Winds > Wind Profiles
  • Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain > Freezing Rain
  • Atmosphere > Precipitation > Precipitation Amount
  • Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain
  • Earth Science > Atmosphere > Precipitation > Solid Precipitation > Ice Pellets > Sleet
  • Earth Science > Atmosphere > Precipitation > Solid Precipitation > Snow
  • Biosphere > Vegetation > Vegetation Cover
  • Terrestrial Hydrosphere > Snow/Ice > Albedo
  • Terrestrial Hydrosphere > Snow/Ice > Snow Cover
  • Terrestrial Hydrosphere > Snow/Ice > Snow Depth
  • Oceans > Sea Ice > Sea Ice Concentration
  • Earth Science > Land Surface > Surface Radiative Properties > Albedo
  • Earth Science > Land Surface > Land Use/Land Cover > Land Use/Land Cover Classification > Vegetation Index
  • Land Surface > Soils > Soil Moisture/Water Content
  • Land Surface > Soils > Soil Porosity
  • Land Surface > Soils > Soil Temperature
  • Earth Science > Land Surface > Surface Thermal Properties > Land Surface Temperature
  • Oceans > Ocean Temperature > Sea Surface Temperature
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • NOMADS > The NOAA Operational Model Archive and Distribution System
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 10 km - < 50 km or approximately .09 degree - < .5 degree
Stratum keywords Global Change Master Directory (GCMD) Location Keywords
  • Vertical Location > Boundary Layer
  • Vertical Location > Land Surface
  • Vertical Location > Sea Surface
  • Vertical Location > Troposphere
  • Vertical Location > Stratosphere
Use Constraints No constraint information available
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Last Modified: 2018-05-25
For questions about the information on this page, please email: ncei.orders@noaa.gov