Please be careful of that Nuclear Winter meme: it was made up by Sagan and heavily promulgated by the left for the sole intent of criminalising the West's nuclear weapons. It's one of the most instantly accepted yet completely unexamined 'truths' on the planet.
A good (but indifferently formatted) analysis can be found here
So, the tempature won’t drop 30 degrees c. below zero, which sucks because I was really counting on a nuclear winter to stop all this global warming crap.
But, what would happen if Israel launches, then Iran, then Syria, then Pok-ee-stom followed by India....and we haven’t even fired a shot yet. I would imagine it won’t be fun. I don’t think I’d like the mud falling from the skies as it will when Yellowstone erupts.