Details about parameters

This section describes special parameters in the DANRA dataset.

Special parameters

The following parameters are encoded using a different schema than WMO standards. Thus, we provide a brief description of those below.

Precipitation type

The precipitation type, prtp0m, describes the most prevalent type of precipitation in the given time frame. The following types are available:

Code	Description
0	Drizzle
1	Rain
2	Sleet
3	Snow
4	Freezing drizzle
5	Freezing rain
6	Graupel
7	Hail

Icing index

The icing index, icei0m is a measure of the risk of icing in the atmosphere. The index is calculated as the maximum risk of icing somewhere in the atmosphere column. The index is an integer between 1 and 4, corresponding to the following risk levels:

Code	Description
1	Trace
2	Light
3	Moderate
4	Severe

AROME Hail diagnostic

The hail diagnostic, xhail0m, is a measure of the risk of hail. It is the maximum total column graupel in kg/m^2 since previous post-processing. Values above 16 kg/m^2 are considered to be a risk of hail.