
Ash from the eruption of Mount St. Helens obscures the Billings skyline in this photo taken from the Grand Avenue on May 19, 1980.
When Washington's Mount St. Helens erupted on May 18, 1980, it sent a plume of volcanic ash across the region. The ash led Montana Gov. Tom Judge to close schools and non-essential businesses across the state. Here are some photos from the day after the eruption in Billings.

Ash from the eruption of Mount St. Helens clouds Billings in this May 19, 1980 photo from the intersection of 17th Street West and Grand Avenue.

Ash from the May 1980 Mount St. Helens eruption coats the ground near Billings.