A description of present weather conditions or a forecast of the weather immediately expected.
“nowcast, n.” OED Online. Oxford University Press, June 2016. Web. 16 June 2016.
I think this word is not very useful. It should be called ‘look outside!’.
So this weekend we’re going to be at the Celtic festival down in Water Valley, hopefully, we won’t have too much mead. Just be careful when a Welsh person challenges you to a drinking contest, that you don’t end up waking up in the next town in someone else’s clothing with no memories of how you got there. Not that I’m talking from personal experience that no one lets me live down.