Basic Info
To get some basic info about all available parameters, use the following request. What you get is the parameter name, leveltype and level for all parameters
GET /api/category/{category}/version/{version}/parameter.json
| Category | For now, there are one category for the API, pmp3g.
|
| Version | When the API for a given category is changed, the version is increased. Old versions will be
available for a limited time.
|
Parameter table
Basic information about the parameters. For now there are two level types, hmsl and hl. hmsl means mean sea level and hl means level above ground.
In the service, for all precipitation parameters you get the unit kg/m2/h. This is the same as mm/h.
For some of the parameters you can find more information.
| Parameter | Unit | Level Type | Level (m) | Description | Value range |
|---|---|---|---|---|---|
| msl | hPa | hmsl | 0 | Air pressure | Decimal number, one decimal |
| t | C | hl | 2 | Air temperature | Decimal number, one decimal |
| vis | km | hl | 2 | Horizontal visibility | Decimal number, one decimal |
| wd | degree | hl | 10 | Wind direction | Integer |
| ws | m/s | hl | 10 | Wind speed | Decimal number, one decimal |
| r | % | hl | 2 | Relative humidity | Integer, 0-100 |
| tstm | % | hl | 0 | Thunder probability | Integer, 0-100 |
| tcc_mean | octas | hl | 0 | Mean value of total cloud cover | Integer, 0-8 |
| lcc_mean | octas | hl | 0 | Mean value of low level cloud cover | Integer, 0-8 |
| mcc_mean | octas | hl | 0 | Mean value of medium level cloud cover | Integer, 0-8 |
| hcc_mean | octas | hl | 0 | Mean value of high level cloud cover | Integer, 0-8 |
| gust | m/s | hl | 10 | Wind gust speed | Decimal number, one decimal |
| pmin | mm/h | hl | 0 | Minimum precipitation intensity | Decimal number, one decimal |
| pmax | mm/h | hl | 0 | Maximum precipitation intensity | Decimal number, one decimal |
| spp | % | hl | 0 | Percent of precipitation in frozen form | Integer, -9 or 0-100 |
| pcat | category | hl | 0 | Precipitation category | Integer, 0-6 |
| pmean | mm/h | hl | 0 | Mean precipitation intensity | Decimal number, one decimal |
| pmedian | mm/h | hl | 0 | Median precipitation intensity | Decimal number, one decimal |
| wsymb2 | code | hl | 0 | Weather symbol | Integer, 1-27 |
More information for some of the parameters
Precipitation Category (pcat)
The precipitation category parameter value is an integer with a value range of 0 to 6. The values represent the following:
| Value | Meaning |
|---|---|
| 0 | No precipitation |
| 1 | Snow |
| 2 | Snow and rain |
| 3 | Rain |
| 4 | Drizzle |
| 5 | Freezing rain |
| 6 | Freezing drizzle |
Percent of precipitation in frozen form (spp)
If there is no precipitation, the value of the spp parameter will be -9. Make sure you handle this in your application!
Cloud cover parameters
The cloud cover is split into four different parameters. They differ by the level above the ground.
| Parameter | Level |
|---|---|
| tcc and tcc_mean | The total cloud cover. How big part of the sky is covered by clouds. |
| lcc and lcc_mean | Low cloud cover. Clouds between 0 and 2500 meters. |
| mcc and mcc_mean | Medium cloud cover. Clouds between 2500 and 6000 meters. |
| hcc and hcc_mean | High cloud cover. Clouds above 6000 meters. |
Weather Symbol
wsymb2, consists of integers, 1 to 27. Every value represents a different kind of weather situation.
| Value | Meaning |
|---|---|
| 1 | Clear sky |
| 2 | Nearly clear sky |
| 3 | Variable cloudiness |
| 4 | Halfclear sky |
| 5 | Cloudy sky |
| 6 | Overcast |
| 7 | Fog |
| 8 | Light rain showers |
| 9 | Moderate rain showers |
| 10 | Heavy rain showers |
| 11 | Thunderstorm |
| 12 | Light sleet showers |
| 13 | Moderate sleet showers |
| 14 | Heavy sleet showers |
| 15 | Light snow showers |
| 16 | Moderate snow showers |
| 17 | Heavy snow showers |
| 18 | Light rain |
| 19 | Moderate rain |
| 20 | Heavy rain |
| 21 | Thunder |
| 22 | Light sleet |
| 23 | Moderate sleet |
| 24 | Heavy sleet |
| 25 | Light snowfall |
| 26 | Moderate snowfall |
| 27 | Heavy snowfall |