1. Mount St. Helens Eruption: On August 27, 1980, the most destructive volcanic eruption in U.S. history occurred when Mount St. Helens erupted in southern Washington. The blast killed 57 people and destroyed miles of forest and homes.

2. First National Park: On August 27, 1916, President Woodrow Wilson signed the Organic Act creating the National Park Service. It was created to oversee and protect the country's growing collection of national parks, monuments, and historic sites. Washington state is home to three national parks: Mount Rainier, Olympic, and North Cascades.

3. Boeing's First Flight: On August 27, 1916, Boeing's first airplane, the B&W, took its inaugural flight in Seattle. From this small beginning, Boeing has grown to become the world's largest aircraft manufacturer.

4. Seattle's First Public Library: On August 27, 1891, the Seattle Public Library opened its doors for the first time. It began as a small reading room in the Occidental Hotel, but it quickly outgrew its space and moved to several locations before finding a permanent home in the beautiful Central Library building in downtown Seattle.

5. Seattle Mariners' Historic Win: On August 27, 2019, the Seattle Mariners won a historic game against the New York Yankees, 10-2, at T-Mobile Park. The win marked the first time in Major League Baseball history that a team had hit five home runs in the first two innings of a game.