Data Transfer: NCEP HREF CONUS Forecasts

g2sub V1.1

g2subset (grib2 subset) allows you to subset (time, field, level, or region) a GRIB2 file and sends you the result
 
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**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     0-0.1 m below ground    0-6000 m above ground    1000 m above ground    10 m above ground    180-0 mb above ground    250 mb    2 m above ground    3000-0 m above ground    400-1000 mb    5000-2000 m above ground    500 mb    700-500 mb    700 mb    80 m above ground    850-300 mb    850 mb    90-0 mb above ground    925 mb    cloud base    cloud ceiling    entire atmosphere (considered as a single layer)    high cloud layer    low cloud layer    mean sea level    middle cloud layer    surface  

Select the variables desired:
 all     APCP    CAPE    CFRZR    CICEP    CIN    CRAIN    CSNOW    DPT    FLGHT    HCDC    HGT    HINDEX    HLCY    LCDC    LTNG    MAXREF    MAXUVV    MCDC    MSLET    MXUPHL    PPFFG    PWAT    REFC    REFD    RETOP    RH    SOILW    TCDC    TMP    TSOIL    UGRD    VGRD    VIS    VVEL    VWSH    WEASD    WIND  

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