The final round of the Pebble Beach National Pro-Am has been washed out by rain and strong winds. Dustin Johnson holds a comfortable four-shot lead but will have to hang on for one more day as the tournament heads into its first Monday finish since 2000. Australian rookie Jason Day is tied for 14th, nine shots off the pace. Tour officials said the final round would begin on Monday if weather permits, but the forecast is not particularly favourable. Monday is expected to be mostly cloudy and windy with showers and an 80 percent chance of precipitation. Winds are expected to be at 15-25 miles per hour with higher gusts. Currently in just his second full year on the PGA Tour, Johnson is looking for his second career win in this event. He picked up his first victory last year in the fall at the Turning Stone Resort Championship. A win and Johnson would join Anthony Kim as the only players under 25 with two PGA Tour titles. Johnson was two strokes off the lead entering the third round and overtook Retief Goosen with a five-under-par 67 at Poppy Hills on Saturday. Goosen fell from the lead after a 74 at Spyglass Hill. Birdies on four of his last nine holes propelled Johnson to a 15-under total of 201. Canadian Mike Weir signed for a 69 at Spyglass Hill to and is in second at 11-under 205. Goosen, a two-time US Open champion is third at 10-under. The South African is looking for his first PGA Tour title in more than three years.