The weather hit the Winter Olympics schedule on Monday, with biathlon and snowboard cross events postponed until Tuesday.
The men's 15km mass start was initially due to take place on Sunday night but sudden fog at the Laura Cross Country Skiing and Biathlon Centre forced organisers to move the event until Monday morning at 1000 local time (0600GMT) as a result of the poor visibility.
Conditions were no better, however, and despite again changing the time to the afternoon, it was decided that the event would be postponed until Tuesday.
If there is no improvement in the weather by Monday night, the women's equivalent - the 12.5km mass start - could follow suit.
The men's snowboard cross was due to start at 1100 local time (0700GMT) on Monday, but it too fell foul of the weather and has now been pushed back to Tuesday.
The event will now get under way at 1030 local time (0600GMT) with a shortened format at the Rosa Khutor Extreme Park.
The competition will begin at the quarter-final stage and athletes will be seeded according to their FIS (International Ski Federation) points.
It was later announced that both runs in the ladies' giant slalom will take place earlier than planned on Tuesday.
The first run will start at 0930 local time (0530GMT) instead of 1100, with the second beginning at 1300 (0900GMT) as opposed to 1430.