Data Transfer: NCEP Great Lakes Wave Model Forecasts

g2sub V1.1

g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and sends you the result
 
Directory:   /glwu.20250629

**NEW** Select one file only (size in bytes)

GRIB Filter

For GRIB data you have to option to filter the data.

Extract Levels and Variables

You may select some or all levels and variables. The selections below represent common choices which may or may not be relevant to the files that you have selected. For example choosing RH (relative humidity) would be pointless in file of sea-surface temperatures. In addition, not all possibilities are allowed. For example, suppose you only want the virtual temperature at the tropopause at 01Z. In this case you'd have to transfer the entire file.

For GRIB-2 data only.

Select the levels desired:
 all     1 in sequence    2 in sequence    3 in sequence    surface  

Select the variables desired:
 all     DIRPW    HTSGW    PERPW    SWDIR    SWELL    SWPER    UGRD    VGRD    WDIR    WIND    WVDIR    WVHGT    WVPER  

Extract Subregion

File transfer times can be reduced by only transferring a subregion. You can use this section to extract a geographic subsection from a most GRIB files. Use negative numbers for south and west.
make subregion  left longitude right longitude
top latitude bottom latitude

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NCEP NOMADS Version 1.2