RJM, on 10 January 2010 - 20:11 , said: Thank you Mikel Nimbus for this. So overall 850 uppers of around -8C or less, plus 528 dam or less, plus dew point <0C, plus surface air temp of as close to 0C as possible (up to 2C?) is overall a higher probability for snow Except when it isn't! Watch out for the warm sectors...