PGA Championship weather: Round 2 resumes after fog delay

Update Saturday, May 18: The second round of the PGA Championship resumed at 9:37 a.m. ET after a 2 hour and 22 minute delay. Play was delayed early Saturday morning due to heavy fog and was originally scheduled to resume at 7:15 a.m.

The second round was unable to be completed Friday after a delay of 80 minutes because of a fatal accident early Friday morning. Seventeen players still need to complete their second round, after which the 36-hole cut will be made.

Round 3 starting times will now be a split tee start in groups of three off of Nos. 1 and 10 tees from approximately 11:17 a.m. - 1:40 p.m.

There is a 25% chance of afternoon thunderstorms today. "Storms that do develop will be slow-moving and could produce heavy rainfall in a short amount of time," according to the official forecast.

Update Friday, May 17: Round 2 was officially been suspended at 8:41 p.m. ET due to darkness. Play will resume at 7:15 a.m. ET on Saturday.

Update: Thursday, 6:10 p.m. ET: Thursday's opening round of the 106th PGA Championship featured pleasant skies for the 156-player field, which took advantage with low scores including Xander Schauffele's 9-under 62, a tournament record.

The second round at Valhalla Golf Club could offer a different test, both mental and physical.

Friday's weather forecast calls for a 90% chance of showers and thunderstorms in Louisville, Kentucky, with rainfall of .50 to .75 inches forecasted. Winds are also expected to gust 10-15 mph. Hence monsoon-like conditions could be in store for the field, with weather delays a possibility throughout the second round.

"A low-pressure system will bring showers and thunderstorms to the region throughout the day Friday," wrote the tournament's official weather forecast. "Rainfall could be heavy at times, especially with thunderstorms."

During the most recent PGA Championship contested at Valhalla (2014), severe weather impacted the final round. After start-and-stop conditions, the final round was completed as darkness fell in the Bluegrass State, with Rory McIlroy memorably defeating Phil Mickelson by one stroke; McIlroy (in the final group) essentially played up with the penultimate group in order to beat darkness.

Even if Friday's second round is pushed into Saturday, the field reduction after the 36-hole cut (top 70 and ties) should mean flexibility to complete 72 holes by Sunday evening. Saturday's weather is no sure thing, though (chance of scattered showers and thunderstorms; 40% chance of rain). In the event of delays both Friday and Saturday, the possibility of a Monday finish would be raised.

Update: Thursday, 7:25 a.m. ET: After a 10-minute fog delay, the opening round of the 106th PGA Championship is underway, with a trumpet ceremony leading into Michael Block's opening tee shot at Valhalla.

Thursday's forecast looks pleasant overall, with partly to mostly cloudy skies. Temperatures should reach 80F, with winds W-SW, 5-10 mph, and perhaps a passing light shower between 5 and 7 p.m. Thunderstorms could arrive overnight, making for a potentially soggy Friday.

Here's the weather forecast for the next three days, as of 6 a.m. Thursday:

• Friday: Showers and thunderstorms likely, 90% chance of rain. Low: 62F, High: 72F. Winds: S-SW 10-15 mph. Projected .50 to .75 inches of rainfall.
• Saturday: Chance of scattered showers and thunderstorms, 40% chance of rain. Low: 62F, High: 78F. Winds: E-NE 4-8 mph. Projected .20 to .30 inches of rainfall.
• Sunday: Partly cloudy and warm, 20% chance of rain. Low: 62F, High: 84F. Winds N-NE, 10-15 mph.

Update: Thursday, 7:20 a.m. ET: The start of Thursday's opening round at the 106th PGA Championship has been delayed 10 minutes due to fog. Michael Block will now hit the opening tee shot at 7:25 a.m. ET.

Update: Tuesday, 10:40 a.m. ET: Tuesday's practice round has resumed after a brief suspension due to dangerous weather in the area. The total time of delay was 46 minutes; play was suspended at 9:50 a.m. and resumed at 10:36 a.m.

Update: Tuesday, 9:50 a.m. ET: Tuesday's practice round at the PGA Championship has been suspended due to potentially dangerous weather in the area. "Please seek shelter immediately," said the official tournament announcement. "The leading edge of the system is potentially dangerous."

The current forecast calls for 1/2 to 1 inch of rain across the day, with locally higher amounts. "Storms are not expected to be severe, but could produce gusty winds, small hail and heavy rainfall," wrote the tournament weather forecast issued at 6 a.m. Tuesday. "Showers and storms will decrease in coverage this evening as we lose the heating of the day."

Scroll below to see the overall weather outlook for the week as well as a day-by-day forecast.

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LOUISVILLE, Ky. – The weather played a prominent role at the 2014 PGA Championship, the last time the year’s second major was hosted at Valhalla Golf Club. Rory McIlroy won his fourth major championship while racing against darkness after torrential rain flooded the course and caused delayed tee times in the final round.

The weather may again play a factor at this week’s PGA Championship, with rain forecasted to arrive at Valhalla as early as Monday evening and remain in the area for several days.

A low-pressure system is expected to slowly move across the region Tuesday, bringing scattered showers and thunderstorms through the day. Rainfall could be heavy at times, with up to 3/4 of an inch forecasted. Showers and isolated thunderstorms are expected to linger for most of Wednesday before the system finally moves east. Drier weather returns Thursday before another low-pressure system brings showers and thunderstorms back to the region Friday into Saturday morning.

Here's a day-by-day breakdown (through Sunday) of the PGA Championship official weather forecast, as of 6 a.m. Tuesday:

• Tuesday: Scattered showers and thunderstorms likely, 80% of rain. Low: 61F, High: 73F. Winds: S 10-15mph.
• Wednesday: Scattered showers and thunderstorms, 60% chance of rain. Low: 60F, High: 73F. Winds: NE to WSW, 4-8 mph.
• Thursday: Partly cloudy, 20% chance of rain. Low: 56F, High: 78F. Winds: SW, 10-15 mph.
• Friday: Showers and thunderstorms likely, 80% chance of rain. Low: 62F, High: 75F. Winds: SW 10-15 mph.
• Saturday: Chance of AM showers, 50% chance of rain. Low: 61F, High: 80F. Winds: NW 10-15 mph.
• Sunday: Mostly sunny and warm, 0% chance of rain. Low: 62F, High: 83F. Winds N 6-12 mph.