Data format
VBar-delimited format
centre | model_id | yyyymm | time | forecast_step | station_id | latitude | longitude | station_elevation | parameter | level | period | score | event | sample_size | mean_value
where
- centre (4-characters string) is the WMO identifier of the originating centre (ammc, cwao, ecmf, edzw, egrr, kwbc, lfpw, rjtd, rksl, rums etc);
model_id (variable-length string) is free model identifier assigned by the originating centre (to distinguish between potentially different models provided by the centre);
- yyyymm is the month of the mean, where yyyy is the year and mm is the month (01-12);
- time is the validity time (in hours UTC) of the forecasts verified;
- forecast_step is the length of the forecast (in hours);
- station_id is the name and/or numeric ID of the observation station verifying the forecasts;
- latitude is the latitude of the observation station verifying the forecasts;
- longitude is the longitude of the observation station verifying the forecasts;
- station_elevation is the elevation of the observation station above the mean sea level in meters;
- parameter is the verified model output parameter:
| parameter | description | unit |
|---|---|---|
| t2m | air temperature at 2 meters above the model orography, corrected to the actual station elevation using the constant lapse rate 6.5K/1000m | K |
| td2m | dewpoint at 2 meters above the model orography | K |
| rh2m | relative humidity at 2 meters above the model orography | % |
| tp06 | total precipitation accumulated over previous 6 hours | mm |
| tp24 | total precipitation accumulated over previous 24 hours | mm |
| ff10m | wind speed at 10 meters above the model orography | m/s |
| dd10m | wind direction at 10 meters above the model orography | deg |
| tcc | total cloud cover | 0-1 (convert to okta for contingency table) |
- score is the name of the verification score or statistic:
| score | description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| me | mean error (bias) | |||||||||
| mae | mean absolute error | |||||||||
| rmse | root mean square error | |||||||||
| ct | contingency table, the 4 values are misses, hits, correct non-events, and false alarms (in this order)
|
- event is the name of the event (for contingency tables)
| event | description |
|---|---|
| val>thr | forecast/observed value greater than a threshold value of the forecast parameter, e.g. for wind speed >15 m/s: val>15 |
| val<=thr | forecast/observed value smaller than or equal to a threshold value of the forecast parameter, e.g. for cloudiness of 0-2 okta: val<=2 |
- sample_size is number of observations used to compute the monthly mean at the given station;
- mean_value is the value or values of the score mean; in case of contingency table these are the 4 values delimited by comma