Mount St. Helens

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Noun1.Mount St. Helens - an active volcano in the Cascade Range in southwestern WashingtonMount St. Helens - an active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivity
Evergreen State, WA, Washington - a state in northwestern United States on the Pacific
Cascade Mountains, Cascade Range, Cascades - a mountain range in the northwestern United States extending through Washington and Oregon and northern California; a part of the Coast Range
References in periodicals archive ?
MOUTH OF HEL Snowmobiler tumbled into the crater at Mt St Helens
US government scientists raised the alert level for Mt St Helens in Washington state after its second steam eruption in two days was followed by a powerful tremor.