NOAA North American Mesoscale Forecast System (NAM)

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The North American Mesoscale Forecast System (NAM) is one of the National Centers For Environmental Prediction’s (NCEP) major models for producing weather forecasts. NAM generates multiple grids (or domains) of weather forecasts over the North American continent at various horizontal resolutions. Each grid contains data for dozens of weather parameters, including temperature, precipitation, lightning, and turbulent kinetic energy. NAM uses additional numerical weather models to generate high-resolution forecasts over fixed regions, and occasionally to follow significant weather events like hurricanes.

Update Frequency

Four times daily (0000, 0600, 1200, and 1800 UTC)


Open Data. There are no restrictions on the use of this data.


Managed By

See all datasets managed by NOAA.


For any questions regarding data delivery not associated with this platform or any general questions regarding the NOAA Big Data Program, email

How to Cite

NOAA North American Mesoscale Forecast System (NAM) was accessed on DATE from

Resources on AWS

  • Description
    North American Mesoscale Forecast System (NAM) Data
    Resource type
    S3 Bucket
    Amazon Resource Name (ARN)
    AWS Region
    AWS CLI Access (No AWS account required)
    aws s3 ls --no-sign-request s3://noaa-nam-pds/
    Browse Bucket
  • Description
    New data notifications for NAM data, only Lambda and SQS protocols allowed
    Resource type
    SNS Topic
    Amazon Resource Name (ARN)
    AWS Region

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