This is a repost of my own:
I drove down to Laguna Seca on Friday afternoon. The weather was beautiful. The weather forecast was 20% chance of showers by 3 PM race day. My tires work in the rain vs the slick race tires of others. At 7:30 Saturday morning it was now a 10% chance by 5 PM. Rain all day Easter Sunday.
At 8 AM I was at the track and wondering where it had gone. The fog was so thick I could only see perhaps 20-30 feet. Then it started to rain. Some forecast.
Rain we can deal with fog not so much. When one flagger can not see the next they close the track with a black flag.
The fog would roll in thick then pull back, where the track was reopened. Then when the fog came back, close it up again.
Here is my first bit of the day. it does get better. More to come.
Leguna Seca: Black flagged for Fog - YouTube