Snow is the most common form of solid precipitation and consists of many very small ice crystals. These form at temperatures below -4 °C, and fall to earth, as long as their falling speed and the temperature and humidity below the clouds do not allow the crystals to melt or evaporate.
The snowfall warnings are primarily issued for widespread precipitation. The warning threshold values in category 2 and 3 for lowland areas differ according to region. Snowfall warnings are issued for levels 2 – 5.
There is a danger of icy conditions due to snow-covered roads.
Road, rail and air travel may be disrupted. Branches may break off under the weight of the snowload. The usability of roads may deteriorate significantly.
Disruptions to air and rail travel are to be expected. Road traffic delays and an increased risk of accidents are to be expected due to icy conditions, snow drifts and poor visibility. Branches may break off under the weight of the snowload and some trees may be toppled. The power supply and/or telephone communications network may suffer outages. Roofs may be significantly burdened by heavy snowloads.
Road, rail and air travel may come to a complete standstill. There is a high risk of road accidents due to icy conditions, snow drifts and poor visibility. Branches may break off under the weight of the snowload and entire trees may be toppled.The power supply and telephone communications network may break down completely.