Available lightning data
On average, 95% of cloud-to-ground lightning is observed using this method. Cloud-to-cloud lightning is also detected, and the method used for this captures up to 70% of these strikes.
MeteoSwiss receives the following parameters from the company Météorage for each lightning event:
- Time of strike to a high level of precision
- Longitude and latitude of the location of the strike
- Polarity and intensity of the lightning
- Number of main flashes (strokes)
- Type of lightning (cloud-to-ground or cloud-to-cloud/intracloud)
- Shape and size of the ellipse that can be said to contain the location of the strike with a 50-percent level of confidence
MeteoSwiss creates various products on the basis of this information (e.g. lightning density maps). Lightning strikes are calculated for all automatic monitoring stations (SwissMetNet) within a radius of 3 kilometres (local strikes around the monitoring station) and between 3 and 30 kilometres (distant strikes). These readings are used to calculate various totals (number of lightning strikes every ten minutes, hour, month and year) as well as peak values.