Abbreviations and codes used in the observer's diary
Table 6: Code for state of ground with snow or ice (download PDF version)
| Code | Description |
| 0 | Ground predominantly covered by ice |
| 1 | Compact or wet snow (with or without ice) covering less than one-half of the ground |
| 2 | Compact or wet snow (with or without ice) covering at least one-half of the ground but ground not completely covered |
| 3 | Even layer of compact or wet snow covering ground completely |
| 4 | Uneven layer of compact or wet snow covering ground completely |
| 5 | Loose dry snow covering less than one-half of the ground |
| 6 | Loose dry snow covering at least one-half of the ground (but not completely) |
| 7 | Even layer of loose dry snow covering ground completely |
| 8 | Uneven layer of loose dry snow covering ground completely |
| 9 | Snow covering ground completely; deep drifts |
