Windy.com is Spec-Friggin-Tacular !!!
I used it to time and judge strength of Morning glory for hang glider soaring over Crocodile Dundee's outback - right in the spot infested with the meanest fiercest crocodilians around - Salties. The salt-water version.
Since then - its gotten EVEN Better !!! Lightning, waves and Satellites Oh, My - G !