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 three categories for the API, pmp1.5g, pmp2g and 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.

For some of the parameters you can find more information.

Parameter Unit Level Type Level (m) Description Value range
msl hPa hmsl 0 Air preassure 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 octas hl 0 Total cloud cover Integer, 0-8
lcc octas hl 0 Low level cloud cover Integer, 0-8
mcc octas hl 0 Medium level cloud cover Integer, 0-8
hcc octas hl 0 High level cloud cover Integer, 0-8
gust m/s hl 10 Wind gust speed Decimal number, one decimal
pit mm/h hl 0 Precipitation intensity Decimal number, one decimal
pis mm/h hl 0 Precipitation intensity, snow Decimal number, one decimal
pcat category hl 0 Precipitation category Integer, 0-6
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 (or Wsymb) code hl 0 Weather symbol Integer, 1-27 (1-15 for pmp2g)

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

There are two different sets of weather symbols. The new set, Wsymb2, consists of integers, 1 to 27. This set can be found in category pmp3g. The old set, Wsymb, consists of integers, 1 to 15. 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 Rain showers
9 Thunderstorm
10 Light sleet
11 Snow showers
12 Rain
13 Thunder
14 Sleet
15 Snowfall
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