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<br />southwest. The average speed of these winds was 11 m/s. <br /> <br />Winds from the west, and occasionally from the northwest were <br /> <br />also recorded during periods of SLW, but with significantly <br /> <br />reduced frequency. <br /> <br />When winds recorded by a sensor 70 magI on the Mesa top were <br />examined for the same period, the greatest SLW production and <br />highest frequency were associated with southerly flow -7 m/s. <br />Winds measured at 16 magI at the same location as the 70 m <br />sensor exhibited similar turning, such that the lowest (16 m) <br />winds were nearly orthogonal to the Mesa as they passed over <br />it. <br /> <br />Winds recorded at Carson Lake, between the arms of the Mesa, <br /> <br />displayed strong diurnal variation in the form of <br /> <br />mountain/valley winds, but periods of SLW were invariably <br /> <br />associated with flow at Carson Lake that was from the south- <br /> <br />west, regardless of hour. <br /> <br />There may be an underestimate in northwest flow cases with <br />detectable SLW because of the location of the microwave <br />radiometer on the south edge of Grand Mesa. Subsidence of <br />the air prior to the vertical passage over the instrument may <br />often deplete some or all of the SLW associated with north- <br />west flow. <br /> <br />Synoptic Overview of SLW Production <br /> <br />The 23 episodes with most abundant SLW over the Grand Mesa <br /> <br />24 <br />