2013 Mixing Height Average Std Dev By Local Daylight Time By Local Daylight Time and Season January 355.7 257.3 Hour Annual S td Dev Winter Avg Spring Avg Summer Avg Fall Avg February 445.6 388.8 1 263.4 119.4 284.9 263.7 238.0 267.7 March 524.6 482.8 2 275.8 147.6 313.7 269.3 231.7 289.3 April 578.5 541.1 3 278.4 154.8 313.7 271.1 230.7 299.3 May 633.3 633.9 4 288.9 207.9 334.1 282.4 233.2 307.2 June 617.4 621.3 5 284.5 158.1 325.6 274.7 235.3 303.6 July 618.0 736.6 6 276.2 125.7 309.0 270.0 240.5 286.2 August 882.8 968.2 7 273.7 125.2 297.3 262.5 243.7 291.8 September 793.7 836.3 8 292.4 154.5 308.7 268.0 274.9 318.4 October 583.1 515.4 9 356.3 201.3 332.8 343.3 353.5 395.6 November 634.8 585.0 10 509.6 323.3 390.1 500.7 559.4 586.6 December 542.4 361.0 11 698.1 369.8 485.5 683.4 862.0 757.5 12 931.9 616.5 579.4 939.8 793.9 978.7 Annual 601.5 13 1118.2 641.9 675.2 1110.5 1421.7 1257.4 Max 6474.2 14 1237.5 733.1 744.0 1233.1 1629.0 1334.2 Min 82.1 15 1319.9 738.4 808.6 1341.1 1699.7 1420.2 Std Dev 623.9 16 1364.3 808.2 873.4 1379.2 1740.1 1454.7 17 1341.1 832.8 824.2 1364.9 1663.9 1501.8 18 1132.5 753.0 645.6 1127.4 1338.9 1410.5 19 662.8 825.1 363.6 320.8 989.6 974.0 20 400.5 469.1 323.1 273.1 576.6 427.9 21 285.7 198.8 312.7 269.6 265.4 295.9 22 282.9 194.6 306.1 264.0 241.8 320.5 23 279.3 159.2 295.7 284.3 241.4 296.6 24 280.0 166.0 304.4 287.6 235.6 293.3 2013 Synoptic Pressure Gradient 850 mb Wind Speed (mph) Average Std Dev Average Std Dev January 0.012 0.006 January 25.1 11.1 February 0.012 0.006 February 23.5 11.4 March 0.011 0.006 March 22.5 10.9 April 0.010 0.004 April 19.8 10.8 May 0.008 0.004 May 18.0 7.6 June 0.006 0.003 June 15.7 8.8 July 0.005 0.003 July 14.1 7.2 August 0.004 0.002 August 10.8 4.5 September 0.005 0.002 September 9.8 6.1 October 0.006 0.005 October 15.5 16.9 November 0.011 0.007 November 21.8 10.5 December 0.011 0.008 December 25.5 12.8 Annual 0.008 0.006 Annual 18.4 11.6