| column name | FM12 code form |
remarks | FM94 code form |
|---|---|---|---|
| SV | FM12 | synoptic message version (FM12 / FM94) | FM94 |
| IIiii | IIiii | identification of a fixed land station | 0 01 001 — 0 01 002 |
| TxTx | TxTxTx | Maximum air temperature, in tenths of degrees Celsius | 0 12 111 |
| TnTn | TnTnTn | Minimum air temperature, in tenths of degrees Celsius | 0 12 112 |
| TgTg | TgTg | Ground minimum air temperature, in tenths of degrees Celsius past 12 hours | 0 12 113 |
| E | E | State of the ground without snow or measurable ice cover (Code table 0901) | 0 20 062 |
| ES | E‘ | State of the ground with snow or measurable ice cover (Code table 0975) | 0 20 062 |
| sh | sss | Total depth of snow (Code table 3889) | 0 13 013 |
| SSS | 553SS | Duration of sunshine in the past hour | 0 14 031 |
| 2FF | 2FFFF | Amount of global solar radiation over a one hour period | 0 14 028 |
| 3FF | 3FFFF | Amount of diffuse solar radiation over a one hour period | 0 14 029 |
| 4FF | 4FFFF | Amount of direct solar radiation over a one hour period | 0 14 030 |
| RR_T1 | tR → 5 | Duration of period of reference [1 hour] | 0 04 024 |
| RR_H1 | RRR | Total Precipitation [last hour] | 0 13 011 |
| RR_D1 | Duration of the precipitate during the last hour in minutes | 0 26 020 | |
| RR_T3 | tR → 7 | Duration of period of reference [3 hours] | 0 04 024 |
| RR_H3 | RRR | Total Precipitation [last three hours] | 0 13 011 |
| RR_D3 | Duration of the precipitate during the last three hours in minutes | 0 26 020 | |
| RR_T6 | tR → 1 | Duration of period of reference [6 hours] | 0 04 024 |
| RR_H6 | RRR | Total Precipitation [last six hours] | 0 13 011 |
| RR_D6 | Duration of the precipitate during the last six hours in minutes | 0 26 020 | |
| RR_T12 | tR → 2 | Duration of period of reference [12 hours] | 0 04 024 |
| RR_H12 | RRR | Total Precipitation [last twelve hours] | 0 13 011 |
| RR_D12 | Duration of the precipitate during the last twelve hours in minutes | 0 26 020 | |
| RR_T24 | R24R24R24R24 | Duration of period of reference [24 hours] | 0 04 024 |
| RR_H24 | R24R24R24R24 | Total Precipitation [last twenty four hours] | 0 13 011 |
| RR_D24 | Duration of the precipitate during the last twenty four hours in minutes | 0 26 020 | |
| C1 | 8NsChShShS | Cloud layer one | 0 08 002 — 0 20 011 — 0 20 012 — 0 20 013 |
| C2 | 8NsChShShS | Cloud layer two | 0 08 002 — 0 20 011 — 0 20 012 — 0 20 013 |
| C3 | 8NsChShShS | Cloud layer three | 0 08 002 — 0 20 011 — 0 20 012 — 0 20 013 |
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