I arrive on 20th as well. Its gonnma snow a real lot on 9th (20cms) and again on the 18th (another 10cms) - yes it is coz I have ordered it from Santa Claus for christmas!!!!
We go on the 20th too(12 of us) to borovets, i have had a word with the almighty ( my drinking partner) he said quote " Nick don't worry there will be a shed load of snow before you arrive and whilst you are there " ( he didnt say shed he said something else) lol!!!!!