2014 Mixing Height Average Std Dev By Local Daylight Time By Local Daylight Time and Season January 652.9 469.0 Hour Annual Std Dev Winter Avg Spring Avg Summer Avg Fall Avg February 693.4 476.6 1 359.3 381.3 404.1 459.6 248.3 328.4 March 807.4 662.8 2 352.0 329.1 426.3 379.5 259.8 343.9 April 1021.7 997.0 3 360.4 348.7 399.3 381.7 297.1 364.4 May 1125.0 1256.5 4 363.9 388.3 372.9 445.5 296.7 340.5 June 1204.0 1277.2 5 342.1 314.0 321.0 418.1 272.1 356.9 July 1059.4 1112.1 6 342.4 312.1 309.0 346.4 276.2 388.7 August 990.5 1072.4 7 354.1 315.7 359.2 387.4 289.8 385.7 September 911.7 1039.5 8 411.1 411.3 353.7 473.8 357.5 393.9 October 751.4 768.8 9 480.8 466.3 427.9 563.9 543.2 385.4 November 626.1 541.8 10 772.9 677.9 526.1 811.4 1155.7 591.2 December 533.9 435.9 11 1149.2 872.5 679.2 1229.5 1741.4 933.9 12 1376.4 947.7 802.3 1509.7 2034.5 1144.1 Annual 865.4 13 1502.3 939.9 925.4 1678.6 2002.8 1388.4 Max 8815.0 14 1628.3 946.6 1001.0 1828.7 2170.3 1498.2 Min 105.0 15 1678.3 846.5 1053.0 1871.9 2172.3 1601.6 Std Dev 920.7 16 1764.3 891.3 1091.7 1993.2 2283.4 1673.3 17 1914.5 1108.4 1129.1 2199.4 2616.4 1693.8 18 1822.6 1144.7 1072.0 2211.3 2510.1 1477.1 19 1434.3 1183.7 740.6 1991.8 2027.6 957.0 20 778.1 898.3 574.4 820.5 1108.8 602.3 21 437.5 527.3 509.8 366.5 475.9 399.0 22 400.7 444.8 479.2 394.8 360.7 369.5 23 382.9 402.2 480.3 449.4 266.4 337.2 24 357.6 367.3 437.4 405.8 233.2 355.7 2014 Synoptic Pressure Gradient 850 mb Wind Speed (mph) Average Std Dev Average Std Dev January 0.014 0.009 January 26.4 12.0 February 0.013 0.007 February 22.0 11.3 March 0.011 0.009 March 18.6 10.9 April 0.010 0.006 April 23.6 11.2 May 0.007 0.003 May 19.1 8.9 June 0.005 0.003 June 14.6 8.0 July 0.005 0.003 July 13.9 7.5 August 0.004 0.002 August 12.4 6.2 September 0.005 0.003 September 11.9 6.9 October 0.008 0.004 October 15.2 6.3 November 0.013 0.008 November 25.6 13.3 December 0.012 0.006 December 20.5 9.4 Annual 0.009 0.006 Annual 18.9 9.3