I was downwind about 200-300 miles from Mount Saint Helens when it erupted.
I never want to go through that again. What to expect was too much of an unknown for nearly everyone here before the eruption. This goes beyond the foolish few who were on the mountain after several weeks of warnings. Most of those people were never found, what with the destroyed forests and massive floods from melting snow.
Downwind, what a mess! It wasn't as tho even just a couple inches of ash would simplygo away in a few days. Thankfully, it was a fairly wet summer after the springtime eruption. However, in the following year and during the dry season, a breeze would hit an evergreen tree right and a cloud of volcanic ash would blow off of it.
The first year, if the ash wasn't wet from rain or covered with snow, it would blow everywhere with any movement of living creatures or vehicles or a breeze. Everywhere. What a mess!
Steve