The Polish Winter Expedition has officially ended. They said that there were 6 reasons that they cancelled it. One can understand from these reasons why it was cancelled.
Firstly, they sent two climbers to check the conditions of the route. These were Janusz Golab and Adam Bielecki. They had to travel to advanced base camp to see what state that camp was in and see the track. Part of advanced base camp was destroyed. The ropes going to C1 were damaged. There was a high probability that all 3 camps to C3 were damaged, and the ropes were likely to be also. Thus they might have to do the whole route again. This would be time consuming and time was running out. Secondly, there was only a short weather window for the summit and that would be on the 11th of March. This was predicted to be lighter winds. Thirdly, some of the climbers felt that they had not been acclimatized. Fourthly, there was over 80 inches of snow in the last 8 days. They believed that the avalanche dangers were too great. K2 is a very steep mountain and that is a real threat. Fifthly, there was reported a large amount of rain at about 7600. This may have added to the threats of avalanche, which is a known area for that. And sixthly, there were bad weather forecasts after the 11th March. This would make it impossible to climb after this date and make the summit before the winter season ended.
They will be obviously be disappointed with this. They held a group discussion and this was what the group decided. They did have sponsors, yet it would have been an expensive expedition. There is a chance that could come back in the future though. K2 is a mountain that can reward patience.