| # | Suffix | Units | Description |
| 1 | sfc | | Surface |
| 2 | clbs | | Cloud Base |
| 3 | cltp | | Cloud Top |
| 4 | frzlvl | | 0 Isotherm |
| 5 | adcn | | Adiabatic Condensation |
| 6 | maxwind | | Maximum Wind |
| 7 | trop | | Tropopause |
| 8 | topa | | Top of Atmosphere |
| 9 | sbot | | Sea Bottom |
| 20 | tmpl | .01 degK | Temperature in 1/100 K |
| 100 | | hPa | Isobaric |
| 101 | liso | kPa | Layer Between Two Isobaric |
| 102 | msl | | Mean Sea |
| 103 | fh | meters | Fixed Height |
| 104 | lfhm | hm | Layer Between Two Heights Above MSL |
| 105 | fhg | meters | Fixed Height Above Ground |
| 106 | lfhg | hm | Layer Between Two Fixed Heights Above Ground |
| 107 | sigma | .0001 | Sigma |
| 108 | ls | .01 | Layer Between Two Sigma |
| 109 | hybr | | Hybrid level |
| 110 | lhyb | | Layer between 2 hybrid levels |
| 111 | bls | cm | Below Land Surface |
| 112 | lbls | cm | Layer Between Two Depths Below Land Surface |
| 113 | isen | degK | Isentropic (theta) level |
| 114 | lisn | degK | Layer between 2 isentropic (theta) levels |
| 115 | pdg | hPa | level at specified pressure difference from ground to level |
| 116 | lpdg | hPa | layer between 2 levels at specified pressure differences from ground to levels |
| 117 | pv | .000001 K m2/kg/sec | potential vorticity |
| 119 | etal | .0001 | ETA level |
| 120 | leta | .01 | Layer between two ETA levels |
| 121 | lish | hPa | Layer Between Two Isobaric Surfaces, High Precision |
| 125 | fhgh | cm | Height level above ground (high precision) |
| 128 | lsh | .001 | Layer Between Two Sigma Levels, High Precision |
| 141 | lism | kPa | Layer Between Two Isobaric Surfaces, Mixed Precision |
| 160 | dbs | meters | Depth Below Sea |
| 200 | atm | | Entire atmosphere considered as a single layer |
| 201 | ocn | | Entire ocean considered as a single layer |
| 204 | htfl | | Highest tropospheric freezing level |
| 212 | lcbl | | Low cloud bottom level |
| 213 | lctl | | Low cloud top level |
| 214 | lcy | | Low cloud layer |
| 222 | mcbl | | Middle cloud bottom level |
| 223 | mctl | | Middle cloud top level |
| 224 | mcy | | Middle cloud layer |
| 232 | hcbl | | High cloud bottom level |
| 233 | hctl | | High cloud top level |
| 234 | hcy | | Highcloud layer |
| 243 | ccth | unknown | convective cloud top height |
| 246 | meptp | unknown | maximum equivalent potential temperature pressure |
| 247 | elh | unknown | equilibrium level height |