Click this for a great animation

My favorites sites to check the weather before flights:

Weatherspark is my favourite and very cool application/ esp. in dashboard mode/ with long term history of climate in specific areas. Many options allows you to grab weather forecast in nearest areas around. You deicide about range of area.

Windyty

and popular Czech

Windguru covering also whole globe

For Finland I’m using http://ennuste.ilmailuliitto.fi/