Jet Stream Loops Spawn Many Tornadoes
KOCO’s Matt Leinbauer reported seeing damage from another confirmed tornado just east of Arnett, Oklahoma.Rescue crews pulled some people alive from the rubble, and more are expected to be found in upcoming days, Greensburg City Administrator Steve Hewitt said.This weekend’s tornadoes were probably F4s and F5s. The last picture I screen captured from CNN shows a hardwood tree ripped out of the ground. I dig up lots of old tree stumps with backhoes. Yesterday, I spent 3 hours using the backhoe and an axe, taking out a hardwood stump that was only 2 1/2 feet in diameter. It was very difficult and the stump was so heavy, I had trouble dragging it away. Last week, I spent 6 hours digging a vast, deep hole, digging up a 4′ oak stump. The stump weighed over a ton, with roots!This satellite photograph shows how huge this storm system still is after three days! The Jet Stream is stuck in place because of the two stationary highs, one on the West Coast and the other on the East Coast. It has been sunny and breezy here on my mountain. We have had a very wet and cold year so far and this is the first dry week we have had in a long time. According to a Jet stream forecast shown above, by Tuesday, the jet stream will be much closer to normal, moving to Canada and the two lower loops will become storms, one over the Atlantic Ocean and one over the Four Corners region in the Southwest. Let us see in detail what is this thing called the "Jet Stream".It is a [عزيزي الزائر يتوجب عليك التسجيل لمشاهدة الرابط للتسجيل اضغط هنا] current of very strong winds in the stratosphere whirling around the North Pole, from west to east, and they do [عزيزي الزائر يتوجب عليك التسجيل لمشاهدة الرابط للتسجيل اضغط هنا] it varying speeds, for not very well understood reasons. Some years they blow at very high speeds, making the current fairly straight; other years they slow down and start ‘snaking’ and twisting in their path, making deep entrances to the equator, and far north to the North Pole. Figure 1 (and the next ones) gives some idea about how climatologists understand this process.At the same time, in the temperate region enclosing North America and Europe, the now slower Jet Stream and its accompanying depressions at the surface (low pressures) can be diverted by other atmospheric general circulation factors. The regions where the atmospheric pressure is high anticyclones behave as hills or stability islands in the atmosphere around which flow the [عزيزي الزائر يتوجب عليك التسجيل لمشاهدة الرابط للتسجيل اضغط هنا] Jet Stream and its depressions [عزيزي الزائر يتوجب عليك التسجيل لمشاهدة الرابط للتسجيل اضغط هنا] (low pressures or "cyclones"). Unlike real mountains, high atmospheric pressures are temporal features and also move eastwards in those latitudes.The weak circulation also creates problems farther north. with strong circulation, depressions carrying rains generally travel through Great Britain and enter the European continent. with a weak circulation, instead, "blocking anticyclones" can settle in some regions deflecting rain carrying currents, causing droughts and heat waves, as happened in Great Britain during the summer of 1976 and the recent summer of 2024.Anyone can try to predict the next 24 hour weather assuming the high pressure systems seen on the weather charts will move slightly to the east, carrying along dry and good weather, while the low pressures will flow around their flanks carrying rain and snow.On occasions, however, for not too well understood reasons, a high pressure system remains "nailed" in some place. This is known as a "blocking anticyclone" and can remain there for days, weeks, even months, acting as a real mountain around which all other weather systems must flow. Given that anticyclones are areas of clear and calm air, the geographic regions under them experience dry and good weather in summer, and cold weather with nocturnal frosts in winter. A summer high that remains too long in any place soon becomes a problem: it can be easily provoke a drought or a heat wave (See figure 3).Weather systems occillate. They also can have stability points. Some can last for many thousands of years such as when the Jet Stream decides to form a loop that runs into the Artic and then down over the middle of the USA and then up over the Atlantic just before the British Isles and then down again over Central Europe: this loopy path then gets locked into place and terrific storms rage on the northern side and glaciers form and we get an Ice Age. Indeed, the loops look almost like the ones we see right now. Just shift them slightly to the east.From Wikipedia:The [عزيزي الزائر يتوجب عليك التسجيل لمشاهدة الرابط للتسجيل اضغط هنا] Super Outbreak is the largest tornado outbreak on record. On April 3 4, 1974, there were 148 tornadoes confirmed in 13 states and one Canadian province: Ontario, Illinois, Indiana, Michigan, Ohio, Kentucky, Tennessee, Alabama, Mississippi, Georgia, North Carolina, Virginia, West Virginia and New York. It extensively damaged approximately 900 square miles (1,440 square kilometers) along a total combined path length of 2,600 miles (4,160 km).[1]It is believed such an outbreak of this magnitude occurs once every 500 years, according to a 2024 special report of the 30th anniversary of the outbreak on WHAS TV in Louisville.I remember that year really well. In Tucson, it was cold! We had sudden freezes. And I had a baby. Since I was going to school, I lived in real cheap housing. And to keep the baby warm, I bought an old mink coat from [عزيزي الزائر يتوجب عليك التسجيل لمشاهدة الرابط للتسجيل اضغط هنا] Value Village and turned it into a fancy velvet lined quilt for my baby. Well, we are just about to exit an el Nino period and these sorts of storms seem to happen more often during el Ninos. I may be mistaken, by the year I was hit by lighning was also a year I was nearly lost in a sudden blizzard, trying to get home from kindergarten.In an El Nino, the warming of the eastern Pacific feeds moisture and energy into storms approaching California and the Southern tier of states. But during a La Nina, colder than normal temperatures in the eastern Pacific bring severe droughts and increases in the intensity and frequency of hurricanes along the Atlantic seaboard.In addition to the droughts in the Southwest and Southeast, La Ninas also bring more winter storms in the Pacific Northwest, more forest fires in the South, and a sharp increase in the number of tornadoes during the spring in the Ohio River and Tennessee River Valley regions, according to Mr. O’Brien and other scientists who have studied the connections between the cold water phenomenon and atmospheric weather systems.Of course, we get huge snow storms so the hills have to be at least 1 1/2 stories tall, perferably 2 stories with a ramp leading up to the front door. This way, you simply close the shutters when the tornado alarm sounds and even if it is a terrible F5 tornado, the people snug in their homes can laugh. I wish I lived in such a place when I was a child in Wisconsin! Indeed, these structures can be good in snow: the roof won’t collapse and like my place here, the kids can take their sleds onto the roof and have fun!
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