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BOUNDARY-LAYER WIND MAXIMA AND ASSOCIATED TEMPERATURE DISTRIBUTIONS AS OBSERVED ON THE 1400-FOOT TELEVISION TOWER NEAR DALLAS, TEXAS,
TEXAS UNIV AUSTIN ELECTRICAL ENGINEERING RESEARCH LAB
Nearly two full years of wind and temperature data obtained from the instrumental television tower at Cedar Hill, Texas, provide the basis of the following summary. Significant wind maxima, one occurrence of a ten-minute average wind maximum per day 2000 CST to noon of the following day were tabulated, along with time and height of occurrence and wind speed. In 606 days of wind data in 1961 and 1962, there were 369 cases 61 of significant wind maxima on the tower. Wind maxima occurred at all tower levels from 4 300 feet to the top 1420 feet. Time of occurrence was centered near 0300 CST with a mean speed of about 35 miles per hour. Wind maxima were most frequent in July 80 and at a minimum in the winter months approximately 40. Some relationship was noted between wind maximum occurrences and mean 850 mb flow patterns, although an index was not found to represent this relationship. Wind profiles were related to temperature structure by cataloging the temperature profiles, and comparing wind profiles on tge basis of temperature profile category. More cases of wind maximum were associated with a ground-based inversion surmounted by a lapse layer thanany other temperature category. Author
AF19 604 2459