Storm clouds are pictured in Milton Tuesday August 4, 2020. (@Ela06243870 /Twitter)
Published Tuesday, August 4, 2020 4:50PM EDT
Last Updated Wednesday, August 5, 2020 5:18AM EDT
A series of tornado watches for Toronto and other parts of the GTA have ended, Environment Canada says.
A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. The windstorm is often referred to as a twister, whirlwind or cyclone, although the word cyclone is used in meteorology to name a weather system with a low-pressure area in the center around which, from an observer looking down toward the surface of the earth, winds blow counterclockwise in the Northern Hemisphere and clockwise in the Southern. Tornadoes come in many shapes and sizes, and they are often visible in the form of a condensation funnel originating from the base of a cumulonimbus cloud, with a cloud of rotating debris and dust beneath it. Most tornadoes have wind speeds less than 110 miles per hour (180 km/h), are about 250 feet (80 m) across, and travel a few miles (several kilometers) before dissipating. The most extreme tornadoes can attain wind speeds of more than 300 miles per hour (480 km/h), are more than two miles (3 km) in diameter, and stay on the ground for dozens of miles (more than 100 km).Various types of tornadoes include the multiple vortex tornado, landspout, and waterspout. Waterspouts are characterized by a spiraling funnel-shaped wind current, connecting to a large cumulus or cumulonimbus cloud. They are generally classified as non-supercellular tornadoes that develop over bodies of water, but there is disagreement over whether to classify them as true tornadoes. These spiraling columns of air frequently develop in tropical areas close to the equator and are less common at high latitudes. Other tornado-like phenomena that exist in nature include the gustnado, dust devil, fire whirl, and steam devil.
Tornadoes occur most frequently in North America (particularly in central and southeastern regions of the United States colloquially known as tornado alley), Southern Africa, northwestern and southeast Europe, western and southeastern Australia, New Zealand, Bangladesh and adjacent eastern India, and southeastern South America. Tornadoes can be detected before or as they occur through the use of Pulse-Doppler radar by recognizing patterns in velocity and reflectivity data, such as hook echoes or debris balls, as well as through the efforts of storm spotters.
Tornado watches issued for Toronto and GTA end
A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person’s activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps or any other kind of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain. The study of timekeeping is known as horology.
Watches progressed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called mechanical watches. In the 1960s the electronic quartz watch was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from the mechanical watch. Historically, this is called the quartz revolution. Developments in the 2010s include smartwatches, which are elaborate computer-like electronic devices designed to be worn on a wrist. They generally incorporate timekeeping functions, but these are only a small subset of the smartwatch’s facilities.
In general, modern watches often display the day, date, month, and year. For mechanical watches, various extra features called “complications”, such as moon-phase displays and the different types of tourbillon, are sometimes included. Most electronic quartz watches, on the other hand, include time-related features such as timers, chronographs and alarm functions. Furthermore, some modern watches (like smart watches) even incorporate calculators, GPS and Bluetooth technology or have heart-rate monitoring capabilities, and some of them use radio clock technology to regularly correct the time.
Today, most watches in the market that are inexpensive and medium priced, used mainly for timekeeping, have quartz movements. However, expensive collectible watches, valued more for their elaborate craftsmanship, aesthetic appeal, and glamorous design than for simple timekeeping, often have traditional mechanical movements, even though they are less accurate and more expensive than electronic ones. As of 2018, the most expensive watch ever sold at auction was the Patek Philippe Henry Graves Supercomplication, which is the world’s most complicated mechanical watch until 1989, fetching USD 24 million (CHF 23,237,000) in Geneva on 11 November 2014.
As of December 2019, the most expensive watch ever sold at auction (and wristwatch) ever sold at auction is the Patek Philippe Grandmaster Chime Ref. 6300A-010, fetching USD 31.19 million (CHF 31,000,000) in Geneva on 9 November 2019.
The weather agency issued the warnings as a severe thunderstorm made its way east across Ontario.
“A severe thunderstorm capable of producing a tornado is located 5 kilometres east of Arthur, moving east at 60 km/h,” the weather agency said in a statement shortly before 5 p.m.
Tornado watches issued for Toronto and GTA end
Torrnado watches were in effect for Toronto, Newmarket, Georgina, Northern York Region, Vaughan, Richmond Hill and Markham.
There were also watches issued for Grand Valley, Southern Dufferin County, Guelph, Erin, Southern Wellington County, Mount Forest, Arthur and Northern Wellington County.
People in those areas were advised to seek shelter immediately if threatening weather approaches.
“This is a dangerous and potentially life-threatening situation,” Environment Canada said at the time. “Take cover immediately if threatening weather approaches. If you hear a roaring sound or see a funnel cloud, swirling debris near the ground, flying debris, or any threatening weather approaching, take shelter immediately.”
No injuries have been reported in connection with the storm so far.