Yes. I have a story. I climbed Mt. St. Helens in 1979 (when it was almost a perfect "cone" -- that's a separate story, LOL). Mt. St. Helens erupted on May 18th, 1980 (a Sunday). Earlier in the spring of that year (March/April 1980) I was sailing on a regular basis every week (Commencement Bay in Tacoma). We could see the steam/smoke plumes rising into the atmosphere as we tacked back-and-forth east/west/east/west. A front row seat to take-in the action! But those early precursors were only in the range of 10,000 to 15,000 feet high (3000m to 4500m). Then, I was in Ellensburg (middle/eastern part of the State) the weekend it erupted - visiting friends. I had a motorcycle at the time, so it was a nice springtime ride from Seattle to Ellensburg (Friday afternoon/evening). On Saturday, we rafted the Yakima River and then stayed up late having fun that night. There were about 8 of us sleeping on the floor of a college dorm room. On Sunday morning, around 8:30 AM, I woke up. Kind of. For some reason. "Something" woke me up. It was probably the eruption (5.1 on the Richter scale). Maybe I felt a gentle ground vibration? But I was 100 miles away (160 km) as the bird flies. And I don't recall people saying that they "heard" anything. So I must have felt something. Anyway, I looked around the room at 8:30... and everyone else was still asleep, snoring. Makes sense. We had been up LATE drinking beer after a long day of river rafting. The window curtains were closed, but I could definitely "see" that it was "light" outside. I laid there awake. Time passed by. 15 minutes. 30 minutes. Then I started to notice that the light outside was "changing" and by 10:00 AM it was TOTALLY DARK outside with a dense "fog" (ash). Holy smokes! The eruption plume was traveling eastward... and had blocked out the rising sun. It was totally dark. By that time, everyone was awake and we pretty-much knew what had happened. And... we knew that NOTHING was going to happen on Monday... so... we went to the bar and brought back several growlers... and had another party! LOL. :-)
From Google...
The Mount St. Helens ash cloud covered eastern Washington, causing total darkness in cities like Spokane, within just a couple of hours of the May 18, 1980 eruption, as winds carried the ash eastward at speeds of about 60 mph, with the ash eventually spreading across the U.S. in three days and circling the globe in 15 days. After the lateral blast, the ash column rose rapidly, reaching over 12 miles (20 km) high within 10 minutes and approximately 80,000 feet (24 km or 15 miles) in less than 15 minutes.