Bad weather has closed down schools, left some remote villages cut off and disrupted traffic and power supplies in the Balkans.
The Bulgarian Red Cross said the snowboarders' bodies were found at 12pm in the Pirin Mountains, and claimed that the two triggered the avalanche that killed them after ignoring warnings.
Heavy snow has caused fatal avalanches in Germany and Austria, and also caused flights to be cancelled at Frankfurt and Munich Airports.
In Germany, the driver of a snow plow died after his vehicle toppled into an icy river.
Police in Lenggries, south of Munich, said the 48-year-old was rescued after several hours but died in hospital.
Austrian military helicopters had to rescue 66 German teenagers from a mountain guest house on Friday where they had been stuck for several days.
In Salzburg, all parks, public gardens, play areas and cemeteries were closed Friday because of the danger of trees falling under the weight of snow.
In eastern Switzerland, police said three people were hurt when an avalanche hit a hotel at Schwaegalp on Thursday afternoon.
Albania's Energy Ministry said a power company employee suffered a fatal heart attack while repairing damaged supply lines.
About 2,000 soldiers and other emergency workers in Albania were assigned to help people trapped by snow and to clear roads to restore access to rural areas.
Serbian state TV reported that several municipalities in the southwest of the country have introduced emergency measures, warning of snow piling up on the roads and sealing off mountain villages.
Most schools in the area closed down and 10 people had to be rescued from their homes, with strong winds causing complications.