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- Polar vortex. The menacing phrase "polar vortex" is a relatively new term for winter weather forecasting, but meteorologists have understood it as a concept for decades.
- Atmospheric (barometric) pressure. Humans inhabit the very bottom of the Earth's atmosphere and everything above creates atmospheric pressure. High-pressure systems form when downward pressure creates a clockwise air rotation, unlike low-pressure systems, which generate counter-clockwise rotation.
- Inch of mercury. Inch of mercury is a unit used to measure air pressure. It represents the amount of pressure the atmosphere places on a one-inch column of mercury under standard gravity at zero degrees Celsius.
- Ball lightning. Lightning in its traditional form is frightening and deadly on its own, but ball lightning is scary even in the context of instant electrocution from the heavens.
A trough is the result of the movements of the air in the atmosphere. In regions where there is upward movement near the ground and divergence at altitude, there is a loss of mass. The pressure becomes lower at this point.
May 10, 2024 · How do ridges influence the weather? Ridges form when the jet stream builds northward in an arc-like shape, and are associated with warm air, high pressure aloft, and a more stable atmosphere. This tends to result in dry, fair weather conditions underneath the ridge.
This glossary of meteorology is a list of terms and concepts relevant to meteorology and atmospheric science, their sub-disciplines, and related fields.
Learn the basics of weather map interpretation and forecast like a meteorologist with this guide from BBC Science Focus Magazine.
Also, the WMO works with most nations of the world to coordinate and synchronize weather observations. Such observations are made simultaneously at specified Coordinated Universal Times (UTC) to allow meteorologists to create a synoptic (snapshot) picture of the weather ( see Chapter 1).
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Jan 23, 2003 · The Snag airstrip, located about 15 miles east of the border town of Beaver Creek, Yukon, does not look like the coldest place in North America. It sits on a plateau above the White River, 1,925 feet above sea level.
