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UWNDSUpper Winds
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Forecasters say the high-pressure ridge that has brought the searing heat this summer to the center of the country is forecast to move toward the Rocky Mountains, which could turn upper winds over the area more to the south, perhaps opening that window of opportunity for a tropical system to move north along the Eastern Seaboard.
The number of observations taken is too small for an adequate description of the atmosphere, and there are still large, data-sparse regions (particularly in the Southern Hemisphere), despite the recent introduction of more sophisticated weather satellites that provide data on upper winds, sea surface temperatures and winds, and upper level temperatures.
He should also be aware of the parameters of lower and upper winds speeds that these turbines are able to operate.
It provides international forecasting services to meet Annex 3 of the ICAO Convention on Civil Aviation, which means it supplies forecasts of upper winds, temperatures and significant weather for all flights around the world.
North of the tropics, however, the upper winds usually blow in a different direction from the winds near the surface- a factor called wind shear, which hinders the development of hurricanes.