Although parts of California were hit by a near-record snowfall this year, it didn't keep me from hiking the entire trail. I was able to flip-flop sections to avoid deep snow until it melted.
Now another weather condition could cause problems for finishing. High winds were blowing in several parts of California, and wildfires were already beginning to flare up in some places.
Nearly every year, PCT thru-hikers have been forced to skip or hike around a section because of a wildfire. This was especially troublesome for 2017 thru-hikers. In fact, my friend Sunkist was attempting a thru-hike that year when she had to end it in Oregon because of closures and poor air quality.