There are 5 Surface variables described in terms of the ECMWF GRIB Code Table 128.
| GRIB Parameter Code | Parameter Name | Description | Units | Comments |
| 151 | MSL | Mean sea level pressure | Pa | - |
| 165 | 10U | 10 metre U wind component | m s**-1 | - |
| 166 | 10V | 10 metre V wind component | m s**-1 | - |
| 167 | 2T | 2 metre temperature | K | - |
| 168 | 2D | 2 metre dewpoint temperature | K | - |