I came home from work last night about 11pm and there was not a cloud in the sky, it was CLEAR and there were a BILLION stars in great seeing conditions with hardly any twinking stars. The milky way was a nice ribbon. What a surprise. So i rushed inside, chatted to my wife for half an hour then grabbed my gear and headed outside and then... no stars - it had clouded over. GRRRRRRR !!! And then it poured down half an hour later again...
can't win
