| Number | Description |
| 0 | Analysis or forecast at a horizontal level or in a horizontal layer at a point in time |
| 1 | Individual ensemble forecast, control and perturbed, at a horizontal level or in a horizontal layer at a point in time |
| 2 | Derived forecast based on all ensemble members at a horizontal level or in a horizontal layer at a point in time |
| 3 | Derived forecasts based on a cluster of ensemble members over a rectangular area at a horizontal level or in a horizontal layer at a point in time |
| 4 | Derived forecasts based on a cluster of ensemble members over a circular area at a horizontal level or in a horizontal layer at a point in time |
| 5 | Probability forecasts at a horizontal level or in a horizontal layer at a point in time |
| 6 | Percentile forecasts at a horizontal level or in a horizontal layer at a point in time |
| 7 | Analysis or forecast error at a horizontal level or in a horizontal layer at a point in time |
| 8 | Average, accumulation, extreme values or other statistically processed values at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval |
| 9 | Probability forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval |
| 10 | Percentile forecasts at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval |
| 11 | Individual ensemble forecast, control or perturbed, at a horizontal level or in a horizontal layer in a continuous or non-continuous interval |
| 12 | Derived forecasts based in all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous interval |
| 13 | Derived forecasts based on a cluster of ensemble members over a rectangular area at a horizontal level or in a horizontal layer in a continuous or non-continuous interval |
| 14 | Derived forecasts based on a cluster of ensemble members over a circular area at a horizontal level or in a horizontal layer in a continuous or non-continuous interval |
| 15-19 | Reserved |
| 20 | Radar product |
| 21-29 | Reserved |
| 30 | Satellite product |
| 31-253 | Reserved |
| 254 | CCITT IA5 character string |
| 255-999 | Reserved |
| 1000 | Cross section of analysis and forecast at a point in time |
| 1001 | Cross section of averaged or otherwise statistically processed analysis or forecast over a range of time |
| 1002 | Cross section of analysis and forecast, averaged or otherwise statistically processed |
| 1003-1099 | Reserved |
| 1100 | Hovmöller-type grid with no averaging or other statistical processing |
| 1101 | Hovmöller-type grid with averaging or other statistical processing |
| 1102-32767 | Reserved |
| 32768-65534 | Reserved for local use |
| 65535 | Missing |