if borovets doesn't cool down and stays the same temperature in 10 days all the snow will be gone at the bottom as there is 50cm of snow at the bottom and each day reasonantly 5cm has melted. but the top isn't melting at all so it will be alright up there. good news in three days it will be back below freezing. unfortunetely pamporovo only has 20cm of snow and thats in the best places.