About the GRIB files

These files are in the WMO standard GRIB format. They are UW-NMS model output interpolated onto the AWIPS 211(80 km) & 215(20 km) grids, defined in NMC Office Note 388, available as a postscript document via anonymouc ftp from NMC at nic.fb4.noaa.gov in the pub/nws/nmc/docs/gribed1 directory.

The UW-NMS model domain does not completely fill the 211 grid, so the areas where no data is available are filled in with average values or Zero values where appropriate.

At present, they contain the following variables, with more to follow soon:

Sea Level Pressure (Pa)
2 meter Temperature (K)
Total Accumulated Precipitation (mm) over the last 6/12 hour period (liquid + ice)

At manditory pressure levels (1000,925,850,700,500,400,300,250,200,150,100 hPa)

Geopotential Height (m)
Temperature (K)
Water Vapor Mixing Ratio (g/g)
Grid Relative U-component (m/s)
Grid Relative V-component (m/s)
Vertical Motion (dz/dt) (m/s)

If you find this information useful, or have any questions, comments or suggestions about the web pages or the model output, please feel free to send email to Manda Adams and let us know!

This page is maintained by:

Manda Adams
amanda@java.meteor.wisc.edu