The Boundary Waters–Canadian Derecho (also called the Boundary Waters Blowdown) was an international derecho that occurred during the afternoon and evening hours of July 4 and the early morning hours of July 5, 1999. It traveled and lasted 22 hours. Storm path North Dakota In the pre-dawn hours of July 4, a band of thunderstorms developed over far eastern North Dakota. Hector International Airport in northwest Fargo recorded winds in excess of 58 mph (95 km/h) for 40 minutes and a maximum wind gust of . Many planes were damaged or overturned. The hangars suffered damage as well. The worst damage occurred farther south in West Fargo, North Dakota and in south central Fargo, North Dakota. Wind gusts in these areas were estimated at as high as . The storm caused $85 million in damage (1999 dollars) in the Fargo metropolitan area. Over 40,000 people were without power. Cars were overturned, roofs were severely damaged, and power poles were blown down. Minnesota The derecho moved into Minnesota and caused massive damage in Cass, Itasca, and Aitkin Counties, at around $3 million. A semi-trailer truck was blown over on U.S. Route 53 near Canyon. One person was killed and 60 were injured as the derecho passed through the Boundary Waters Canoe Area Wilderness (BWCAW) and Superior National Forest. People were there to enjoy canoeing and other recreation for the Independence Day weekend. Straight line winds in excess of 90 mph (145 km/h) uprooted and snapped off trees in over 370,000 acres (1,500 km²) of the 1 million acre (4,000 km²) wilderness area. In total, more than 477,000 acres (1,930 km²) of forest was affected in the Superior National Forest in a swath 30 miles (48.3 km) long and 4 to 12 miles (6.4 to 19.3 km) wide. It is estimated that 25 million trees were blown down in the BWCAW. Ontario The derecho brought more damage when it crossed the border into Ontario during the early afternoon hours of July 4. At its peak near Thunder Bay, the winds were estimated to have been much stronger, around 100 mph (160 km/h) and it spawned some small tornadoes. One small sailboat was overturned and two people were thrown into the cold waters of Lake Superior. They were rescued by a nearby boater. The storm carved a path of destruction into the sparsely populated forested areas of northern Ontario. The Canadian Pacific track