2016 Mixing Height Average Std Dev By Local Daylight Time By Local Daylight Time and Season January 504.5 406.9 Hour Annual Std Dev Winter Avg Spring Avg Summer Avg Fall Avg February 690.0 636.0 1 295.5 293.8 396.4 316.0 231.1 283.7 March 755.2 721.9 2 276.6 249.3 364.4 273.6 243.1 265.9 April 1037.0 1131.1 3 271.3 231.6 358.3 284.0 218.4 261.6 May 1074.2 1159.4 4 280.8 261.5 370.2 299.6 219.0 276.7 June 1245.6 1483.6 5 260.5 194.5 345.5 249.0 218.5 259.2 July 1236.4 1450.7 6 272.2 217.2 352.1 293.7 208.5 255.8 August 1192.2 1406.9 7 279.1 266.7 343.7 311.1 227.1 248.2 September1172.5 1419.0 8 335.5 337.7 383.1 382.7 319.2 274.6 October 829.2 998.0 9 479.2 484.1 439.7 560.9 630.7 296.0 November 583.1 610.5 10 920.4 932.6 555.2 994.5 1641.8 462.5 December 468.9 392.9 11 1425.9 1082.1 724.8 1367.1 2206.6 1190.4 12 1622.8 1156.3 820.1 1588.1 2397.5 1425.8 Annual 899.0 13 1804.4 1130.2 917.8 1760.2 2497.6 1708.1 Max 9787.2 14 1960.6 1160.9 962.8 1928.9 2717.4 1867.1 Min 60.0 15 2021.3 1222.2 1003.7 2104.9 2795.7 1831.3 Std Dev 1098.5 16 2095.8 1209.8 1036.7 2190.1 2947.2 1846.0 17 2031.9 1260.8 813.2 2216.4 2891.9 1803.1 18 1854.8 1387.8 533.4 2090.2 2809.3 1556.3 19 1326.9 1406.4 449.9 1551.0 2488.1 675.1 20 536.3 787.7 445.8 754.5 600.0 343.7 21 324.3 411.0 452.1 359.6 210.1 316.5 22 317.7 421.8 382.5 399.4 219.4 291.8 23 293.5 359.9 381.6 329.1 233.7 265.4 24 288.9 296.1 403.4 304.8 210.7 272.5 2016 Synoptic Pressure Gradient ORNL-NAM Boundary Layer Wind (kts) Average Std Dev Average Std Dev January 0.012 0.007 January 4.7 2.1 February 0.012 0.007 February 5.3 2.3 March 0.010 0.005 March 5.2 2.2 April 0.009 0.005 April 5.3 2.2 May 0.007 0.004 May 4.7 1.6 June 0.004 0.002 June 4.2 1.3 July 0.004 0.002 July 4.1 1.5 August 0.004 0.002 August 3.9 1.3 September 0.005 0.003 September 4.0 1.2 October 0.007 0.005 October 4.5 1.8 November 0.008 0.006 November 6.1 5.4 December 0.012 0.007 December 5.1 2.7 Annual 0.008 0.005 ORNL 850-mb Wind (kts) Average Std Dev June 12.0 6.7 July 10.8 7.0 August 9.9 5.5 September 9.6 5.3 October 15.3 8.2 November 17.5 12.3 December 25.6 13.9