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What are high pressure systems and how do they contribute to our weather?
When the weather is dry, tranquil and nice, you can typically thank high pressure systems for keeping stormy and rainy weather at bay.Get more news about high and low pressure components wholesaler,you can vist our website!
A high pressure system is essentially a clockwise flow of dry, sinking air that typically builds into a region behind a departing storm system. High pressure systems can be linked to the jet stream by finding areas where the jet bulges northward.The jet stream is essentially an atmospheric river of air located at the level where jets cruise. Winds in the jet stream often reach 250 mph.
On the eastern side of a high pressure, winds coming out of the north generally drag chillier air southward from northern latitudes.
Winds blow out of the south on the western side of a high pressure and bring warmer air northward from more tropical climates.The calmest conditions and sunniest skies are found near the center of a high pressure system, where air sinks most efficiently and warms as it does so.
Most frequently, high pressures move around the globe in a west-to-east manner. However, these systems can sometimes reverse course or “buckle” and stop over a region for as long as a couple of weeks.
It is when these systems become semi-permanent over southeastern Canada and/or Greenland during the winter months that the jet stream is forced southward into the central and eastern United States, as well as parts of Europe. This type of weather pattern can breed dangerous blizzards and lead to bitter cold snaps in both Europe and the eastern U.S.
“High pressure systems can help strengthen nor'easters by funneling moisture from the Atlantic Ocean into these storms," AccuWeather Senior Meteorologist Alex Sosnowski said.
"At other times, moisture can develop on the southern side of high pressure areas," he added. "During the winter, this moisture can help produce bands of heavy snow downwind of the Great Lakes."
Another example of when high pressures can spoil the weather occurs when fog forms and becomes trapped in valley locations for days at a time.
"Light winds and cold, moist air trapped near the ground lead to this persistent fog, which is common in the broad, extensive valleys of the western United States in the winter," according to Sosnowski.
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