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Cirrus clouds (WMO abbreviation Ci) are formed in a natural way when water vapor freezes into ice crystals at altitudes above 8000 meters (26,000 ft) in the higher part of the troposphere. The exact altitude depends also on the height of the tropopauze, the boundary with the stratosphere and the higher levels of earth's atmosphere. That means that Cirrus clouds in polar regions will appear at a much lower altitude than at the equator.
High-level Clouds: 16,500 to 45,000 ft.
Originally posted by luxordelphi
Las Vegas is a desert. There is no water. There is no rain. There are no clouds.
Las Vegas gets between 3 1/2 to 4 1/2 inches of rain a year. Of late, it's not unusual for 1/2 to 3/4 of an inch to fall in one day - basically the allotment for a month and a half.
As for cloud seeding in the USA, it's about as secretive as the location of the nearest Starbucks
These exponentially growing programs have no government or public oversight, limited oversight in a very few states which allow them, and no government or public oversight or consent for the rest of them. These programs change the climate, the micro-climates needed for watersheds, negatively impact tree health, and agriculture crop production. NOAA lists some of these programs but most are not listed due to their experimental nature, military classification, university experiments, and failures to notify NOAA by various states, counties, cities, weather modification companies, and private individuals and corporations who may all modifying your weather
If the tropopauze decreases in height with increasing latitude, then cirrus aviaticus becomes intrinsically tied to lower altitudes.
You have propogated disinformation on this site regarding the height of cirrus aviaticus.
Originally posted by Essan
Anyway, if you are so concerned about cloud seeding, why not contact those who pay for it - farmers, winter ski resorts and water authorities?
Originally posted by CherubBaby
ski resorts? they dont seed clouds or pay for it, they they dont even require natural snow. Its called snow making machines at dusk till dawn ok?
This paper presents the modeling results from a ground and airborne cloud seeding case in the Walker River Basin for a period from 1-3 February 2004. The inner domain of MM5 was centered on a region that encompassed all ground seeding generators, the aircraft seeding track and the downwind instrument and snow sampling sites. MM5 output variables are compared to precipitation data at several locations, radiometer vertically integrated cloud water and vapor, and aircraft data. LAP seeding plume simulations are used to evaluate the effectiveness of ground seeding sites for this case, and a new elevated line source simulation is used for the first time to show the predicted evolution of the aircraft seeding plume."
Extended Abstract: ams.confex.com...
“[Project Stormfury] was discontinued just as new planes for doing the interventions were made available. It seems that we had a deliberate effort to stifle success at the very time that the national weather bureau and other weather-related government agencies were being privatized (the National Weather Service, like the Federal Reserve Bank, the Atomic Energy Commission and the National Science Foundation are privately owned and controlled organizations -- each operating in their respective fields in totally unregulated and largely unsupervised environments, with the public thinking that each is part of the government...
In 2011, the House of Rothschild acquired a majority stake in Weather Central, the world’s leader in weather, forecasting, traffic, news and sports systems.
“NEW YORK--(BUSINESS WIRE)--E.L. Rothschild LLC, a private investment company led by Chairman Sir Evelyn de Rothschild and CEO Lynn Forester de Rothschild, today announced the signing of a definitive agreement to acquire a 70% interest in Weather Central, LP (www.wxc.com). The world’s leading provider of interactive weather graphics and data services for television, web, and mobile, Weather Central’s highly accurate and personalized forecasting offers businesses and consumers a truly unique suite of science-driven weather information products. The company will continue to operate under CEO and founder, Terry Kelly, as well as current management. Financial terms of the acquisition were not disclosed...