The German Weather Service (DWD) provides information about weather conditions and also issues official severe weather warnings in emergencies. These are divided into four categories:
Level 1 (yellow): Thunderstorm: electrical discharge, also in conjunction with wind gusts from 50 km/h.
Level 2 (orange): Strong thunderstorm: associated with squalls, severe gusts of up to 104 km/h, heavy rain or hail
Level 3 (red): Severe thunderstorms: with hail, heavy rain or hurricane-like gusts up to 119 km/h, possible risk of tornadoes (red)
Level 4 (dark red): Extreme thunderstorm: with hailstorms, extremely heavy rain or extreme hurricane-like gusts from 120 km/h, possible risk of tornadoes.
Purple: Heat warning / Pink: UV warning / Green: No warning / Hatched: Advance warning