A) Weather Europe

1. Central Europe

2. Scandinavia

Wetter.ch (Switzerland)
Landi.ch (Rain radar)
Wetter.de (Germany)
Wetter.com (Europe)

Vedur.is (Iceland)
www.YR.no (Norway, Sweden)

B) Weather Worldwide

1. General

2. Selected special forecasts

Meteoexploration.com (Patagonia)
Meteoblue.com (Patagonia)
Metservice.com (New Zealand)

C) Other information on weather

1. Avalanche bulletins

2. Climate

Slf.ch (Switzerland)
Avalanches.org (Europe overview)

Eumetsat.int (Monitoring)
NOAA (National Climatic Data Center)

3. Earthquake Monitoring

4. Other

Wind finder.com
Animated wind map (Highly recommended!)