The Country Club's long rough and tough greens might not be the only thing slowing down players on Friday at the U.S. Open.
Weather may play a part, too.
As the afternoon wave hit the course, rain began to fall with more in the forecast.
According to the USGA's weather report, scattered thunderstorms are expected in the afternoon around 2 p.m. and 3 p.m. local time. The tournament is played in Brookline, Mass.
Rain isn't the biggest issue for the players. As we've seen in other majors this year, rain can be played through for the most part. However, if there is any lightning in the area, play would be suspended and impact the tournament.
Wind is also expected to pick up as the day rolls on. Winds during the 2 o'clock hour will sit around 14 mph. Those winds will reach 16 mph around 5 p.m. local time.
If the thunder and lightning can miss the area, weather shouldn't make a significant impact. At least not more than what was expected.
Players like Rory McIlroy, Jon Rahm, Collin Morikawa and Jordan Spieth were among the players to tee off in the afternoon. Scottie Scheffler and Nick Hardy were in the clubhouse tied at 3-under for the lead after two rounds, while Callum Tarren was the leader at 4-under through six holes of his afternoon second round as of 2:15 p.m. ET.
Rain is not expected on Saturday for the third round or potentially finishing the second round. Winds will be near 20 mph, though, making it another challenge for the players to navigate.