Current thunderstorm hazards
Updated on: 21.09.2021, 07:01
Teaser
Danger level 1 (No or minor danger)
Danger level 2 (Moderate danger)
Danger level 3 (Considerable danger)
Danger level 4 (High danger)
Danger level 5 (Very high danger)
No danger level
Danger level 1 (No or minor danger)
Thunderstorm warnings are only issued for categories 3 and 4.
Danger level 2 (Moderate danger)
Thunderstorm warnings are only issued for categories 3 and 4.
Danger level 3 (Considerable danger)
Effects:
- Flash flooding of streams
- Toppling of trees
- Possibility of localised landslides on steep slopes
- Damage from hail and lightning strikes
- Failure of drainage and sewer systems.
- Flooding of underpasses, underground garages and cellars.
- Disruption to road, rail and air traffic
- Danger to vessels on lakes from very strong gusts of wind arising rapidly without warning
Behaviour:
- Keep an eye on local weather developments
- Seek shelter of lightning strikes, hail or storms
Description of measurement and prognostic values:
- Severe thunderstorm (flash thunderstorm; localised, warning time 0 to 2 hours): 90-120 km/h, 2-4 cm (hailstones), 30-50 mm/h
Danger level 4 (High danger)
Effects:
- Flash flooding of streams
- Toppling of trees
- Possibility of localised landslides on steep slopes
- Damage from hail and lightning strikes
- Failure of drainage and sewer systems.
- Flooding of underpasses, underground garages and cellars.
- Disruption to road, rail and air traffic
- Danger to vessels on lakes from very strong gusts of wind arising rapidly without warning
Behaviour:
- Keep an eye on local weather developments
- Seek shelter of lightning strikes, hail or storms
Description of measurement and prognostic values:
- Very severe thunderstorm (flash storm, local; warning time 0 to 2 hours): > 120 km/h, >4 cm hailstones, >50 mm/h
Danger level 5 (Very high danger)
Thunderstorm warnings are only issued for categories 3 and 4.
No danger level
No evaluation.
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Thunderstorms: No or minor danger, level 1
