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 S td Dev Winter Avg Spring Avg Summer Avg Fall Avg February 470.5 482.8 1 253.6 230.7 268.3 245.6 210.5 290.6 March 691.4 963.0 2 258.1 195.7 284.3 238.3 211.5 299.0 April 674.7 742.2 3 264.1 212.8 287.3 260.7 212.0 297.2 May 832.2 1071.7 4 260.8 191.5 285.5 236.2 219.3 302.8 June 982.2 1129.7 5 249.0 143.8 268.0 221.1 216.5 291.3 July 928.6 1163.1 6 253.6 168.7 266.3 238.6 210.7 300.2 August 761.5 895.9 7 257.9 179.2 270.3 230.3 215.2 316.8 September 750.4 850.1 8 289.9 175.3 307.0 277.1 269.2 306.5 October 603.2 564.4 9 439.1 361.9 353.6 455.0 561.1 385.1 November 420.7 348.3 10 753.2 716.3 440.3 879.4 1151.4 535.9 December 443.8 363.8 11 1038.8 830.0 504.8 1209.5 1659.9 740.1 12 1251.5 896.3 597.8 1507.9 1813.8 1077.4 Annual 658.8 13 1339.1 856.8 687.6 1678.9 1806.6 1174.5 Max 7674.8 14 1435.7 944.8 745.6 1802.3 1983.0 1202.0 Min 75.0 15 1588.6 1114.2 859.6 1992.3 2156.7 1342.3 Std Dev 820.1 16 1576.5 1078.2 899.3 1913.3 2115.1 1368.6 17 1461.2 1089.6 745.2 1712.3 2151.3 1225.5 18 1118.6 1100.0 440.1 1200.4 2002.5 820.8 19 531.8 839.7 359.6 322.4 1153.6 287.0 20 254.9 311.1 315.3 197.1 236.4 271.5 21 233.3 210.2 303.0 189.7 180.7 260.5 22 242.4 220.4 330.5 201.5 178.4 260.4 23 229.5 160.9 264.1 200.3 183.0 271.6 24 235.6 159.5 257.9 197.6 196.6 291.1 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