2012 Mixing Height Average Std Dev By Local Time of Day By Local Time of Day and Season January 379.8 378.8 Hour Annual Std Dev Winter Avg Spring Avg Summer Avg Fall Avg February 476.3 479.6 1 301.7 229.0 289.3 299.5 266.1 352.5 March 731.6 943.6 2 307.3 191.5 307.5 292.5 267.4 362.5 April 705.0 724.3 3 315.2 207.9 312.6 315.2 275.1 358.5 May 860.7 1055.4 4 312.8 187.3 310.7 293.8 282.8 364.3 June 1013.6 1108.7 5 302.1 144.0 296.5 275.8 275.4 361.4 July 955.9 1146.4 6 301.1 166.7 292.6 290.8 264.0 357.7 August 801.0 872.7 7 304.4 176.3 294.9 282.6 272.9 367.6 September 786.6 829.8 8 334.0 167.7 329.8 324.9 318.5 363.2 October 638.7 543.2 9 474.4 347.9 376.0 492.7 591.4 436.1 November 464.5 326.2 10 775.1 703.4 461.6 892.6 1162.1 578.7 December 497.8 341.5 11 1042.0 820.9 522.8 1211.7 1663.7 761.0 12 1257.9 889.7 612.0 1511.3 1817.0 1082.3 Annual 690.0 13 1344.4 850.4 698.5 1680.5 1810.7 1179.2 Max 7674.8 14 1440.9 938.5 753.6 1807.1 1987.6 1205.3 Min 60.0 15 1594.5 1108.0 859.6 1998.1 2163.6 1346.0 Std Dev 804.5 16 1582.8 1070.7 908.4 1920.5 2121.6 1371.2 17 1470.0 1079.9 755.6 1722.0 2158.5 1233.3 18 1134.0 1087.8 456.1 1216.4 2013.6 839.3 19 560.4 829.6 382.1 351.8 1178.7 324.7 20 290.5 307.9 341.8 235.2 278.3 307.4 21 271.4 210.0 329.8 231.8 217.2 308.2 22 242.4 220.4 354.6 250.1 217.2 317.0 23 284.4 219.5 290.1 248.4 232.8 332.8 24 282.5 160.4 284.2 252.9 245.7 347.7 2012 Synoptic Pressure Gradient 850 mb Wind Speed (mph) Average Std Dev Average Std Dev January 0.012 0.006 January 29.0 13.7 February 0.010 0.006 February 22.7 13.4 March 0.010 0.006 March 20.7 10.8 April 0.010 0.006 April 16.2 8.5 May 0.006 0.003 May 12.9 6.6 June 0.006 0.003 June 10.3 5.5 July 0.004 0.002 July 10.4 4.6 August 0.004 0.002 August 8.5 4.7 September 0.006 0.003 September 11.8 7.5 October 0.009 0.007 October 18.2 12.1 November 0.007 0.005 November 15.6 9.3 December 0.011 0.007 December 22.7 10.3 Annual 0.008 0.006 Annual 15.3 10.0