Weather became part of the story in the latter half on Day 1 of the 2015 British Open.
As the wind picked up in the afternoon wave at St. Andrews, the Old Course became more difficult and the definition of a good score changed. Though Zach Johnson and Danny Willett were able to fire 6-under 66s in the afternoon, they were rare examples of players who weren't ravaged by the wind.
The weather is expected to become even more of a factor on Friday. A quarter-inch of rain is anticipated overnight, leading into Friday's play, where intermittent heavy rain is forecast until around noon local time. Winds are expected to come from the south at about 25-35 mph in the morning session before weakening to 20-30 mph and changing to come from out of the southeast in the afternoon, though gusts over 40 mph are possible through the day.
On Saturday, it will be brutal for everyone who makes the cut, with winds potentially gusting over 50 mph.
There will be a reprieve for the final round, with partly sunny conditions and little wind expected. The course could play a little softer and lead to an all-out sprint for the Claret Jug.