Latest forecasts from GFS (Global Forecasting System) showing the weather patterns changing from the night of the 12/13 Jan, with snow for pretty much the entire week after in Borovets...
Dancing morning, noon and night. Just found this.
http://www.metcheck.com/SEASONAL/ski_forecast_14days.asp?resortID=20&Country=Bulgaria&Resort=Borovets
There does seem to be a pattern from weather sites.
Yes it would appear that most forecasts are saying pretty consistant snow/rain from around 12th of jan for round a week. As go to pamps on the 18th this is great news!