| YEAR(S | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1974 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 21.50 | 117.41 | a | 466.00 | 746.90 | a | 1072.60 | a | 2424.41 | |||
| 1975 | 1021.45 | a | 818.50 | 768.00 | 701.00 | 311.50 | 117.50 | 7.50 | 41.00 | 65.00 | 506.50 | 818.57 | b | 957.38 | a | 6133.90 | ||||||||||
| 1976 | 1021.00 | 799.57 | a | 790.00 | 559.00 | 156.00 | 97.00 | 6.00 | 82.00 | 125.50 | 467.50 | 703.00 | 1142.50 | 5949.07 | ||||||||||||
| 1977 | 1075.91 | b | 738.89 | a | 813.00 | 398.00 | 462.50 | 25.50 | 9.30 | a | 9.00 | 156.00 | 398.87 | a | 689.42 | d | 831.50 | 5607.89 | ||||||||
| 1978 | 885.00 | 754.50 | 558.52 | a | 542.68 | b | 347.00 | 79.66 | a | 13.50 | 67.50 | 237.22 | c | 409.50 | 881.90 | a | 1264.36 | c | 6041.33 | |||||||
| 1979 | 1140.36 | c | 817.00 | 684.67 | b | 423.50 | f | 220.10 | a | 96.35 | d | 2.14 | b | 34.44 | d | 83.50 | 373.60 | b | 844.00 | 972.48 | d | 5268.64 | ||||
| 1980 | 713.50 | f | 700.50 | 547.00 | i | 457.50 | 178.50 | m | 49.00 | k | 10.85 | a | 53.73 | a | 214.29 | b | 537.50 | 779.42 | d | 709.50 | i | 2753.79 | ||||
| 1981 | 1003.76 | b | 721.78 | a | 697.50 | a | 426.50 | 256.00 | 80.77 | d | 0.00 | z | 68.72 | a | 91.50 | 539.00 | 428.50 | j | 777.00 | 4662.52 | ||||||
| 1982 | 1187.00 | 715.50 | 787.00 | 565.00 | 228.50 | 89.50 | 3.50 | 0.50 | g | 179.50 | 471.50 | 806.00 | 979.00 | 6012.00 | ||||||||||||
| 1983 | 964.50 | 688.50 | 675.00 | 620.50 | 326.00 | 54.00 | 43.50 | 14.50 | 122.59 | a | 434.00 | 445.00 | m | 922.00 | 4865.09 | |||||||||||
| 1984 | 1086.00 | 874.50 | 674.00 | 575.50 | 203.50 | 117.00 | 0.00 | 0.00 | a | 160.00 | 606.00 | 790.00 | 1129.00 | 6215.50 | ||||||||||||
| 1985 | 1181.00 | 914.00 | 872.13 | a | 384.00 | 248.50 | 54.50 | 0.00 | 27.50 | 290.69 | a | 407.00 | i | 959.00 | 1127.00 | 6058.32 | ||||||||||
| 1986 | 870.00 | 660.07 | a | 541.50 | 464.00 | 300.50 | 17.00 | 3.50 | l | 0.00 | 340.50 | 271.50 | o | 747.00 | 1013.50 | 4954.07 | ||||||||||
| 1987 | 1121.00 | 777.50 | 652.00 | 376.03 | a | 167.50 | 20.00 | 24.50 | 2.50 | 64.50 | 313.50 | 735.50 | 1039.50 | 5294.03 | ||||||||||||
| 1988 | 1055.55 | a | 820.00 | 687.50 | 417.00 | 277.50 | 17.00 | 0.00 | r | 0.00 | c | 140.50 | 233.00 | 693.50 | 1076.00 | 5417.55 | ||||||||||
| 1989 | 1170.00 | 1050.52 | a | 542.50 | a | 325.50 | 248.50 | 13.50 | 1.00 | 28.00 | 76.50 | 437.50 | 760.00 | 1043.00 | 5696.52 | |||||||||||
| 1990 | 1104.50 | 942.00 | 599.50 | 216.00 | i | 285.50 | 47.50 | 0.50 | 19.50 | 49.00 | 344.50 | 792.00 | 1355.50 | 5540.00 | ||||||||||||
| 1991 | 1161.00 | 649.50 | 738.00 | 513.00 | 388.00 | 113.50 | 0.00 | 4.13 | a | 78.50 | 321.00 | 726.50 | 1048.00 | 5741.13 | ||||||||||||
| 1992 | 1053.00 | 694.00 | 577.00 | 275.50 | 93.00 | 82.00 | 9.00 | 17.00 | 64.50 | 310.00 | 844.50 | 1105.50 | 5125.00 | |||||||||||||
| 1993 | 1187.50 | 833.50 | 497.50 | 466.00 | 164.00 | 150.50 | 24.50 | 25.83 | a | 139.50 | 388.50 | 904.50 | 1006.50 | 5788.33 | ||||||||||||
| 1994 | 987.50 | 833.00 | 564.00 | 363.00 | e | 197.00 | 48.00 | 0.00 | 2.50 | 75.50 | 455.50 | 947.00 | 988.50 | 5461.50 | ||||||||||||
| 1995 | 846.00 | 580.50 | 682.00 | 524.50 | 313.50 | 150.50 | 9.00 | 7.50 | 58.00 | 395.50 | 559.00 | 831.50 | 4957.50 | |||||||||||||
| 1996 | 838.00 | 687.50 | 674.50 | 441.00 | 234.00 | 57.00 | 0.00 | 2.00 | 154.50 | 415.50 | 702.00 | 853.50 | 5059.50 | |||||||||||||
| 1997 | 929.00 | 740.00 | 561.50 | 476.00 | 135.22 | b | 73.50 | 17.00 | 1.00 | 84.00 | 442.50 | 676.50 | 1109.00 | 5245.22 | ||||||||||||
| 1998 | 818.50 | 749.50 | 683.55 | a | 558.50 | 419.00 | 89.50 | 0.00 | z | 0.00 | 95.50 | 497.00 | 709.50 | 1102.00 | 5722.55 | |||||||||||
| 1999 | 907.61 | d | 722.00 | 699.57 | a | 519.23 | d | 260.18 | c | 96.00 | 1.00 | 2.30 | d | 95.50 | 222.00 | k | 617.50 | 1041.00 | 4961.88 | |||||||
| 2000 | 830.00 | 657.52 | c | 649.50 | 365.00 | 206.00 | 36.00 | 0.00 | z | 0.00 | z | 136.03 | a | 420.57 | a | 885.00 | c | 651.50 | i | 4185.62 | ||||||
| 2001 | 250.50 | x | 860.00 | 559.00 | 491.25 | b | 80.17 | b | 0.00 | z | 0.00 | t | 0.00 | z | 0.00 | z | 305.50 | g | 656.50 | 915.53 | a | 3562.46 | ||||
| 2002 | 1001.00 | 788.00 | 791.50 | 439.50 | 319.50 | 61.50 | 0.00 | 3.50 | 97.50 | 488.50 | 749.50 | 926.50 | 5666.50 | |||||||||||||
| 2003 | 693.50 | 894.78 | e | 646.72 | b | 464.50 | g | 257.41 | c | 46.50 | 0.00 | 0.53 | b | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 2539.45 | ||||
| 2004 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 2005 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 2006 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | |
| 2007 | 917.50 | i | 771.83 | e | 608.50 | 452.00 | 0.00 | z | 58.27 | d | 0.00 | g | 0.00 | 178.00 | i | 483.50 | 494.00 | g | 0.00 | z | 2374.10 | |||||
| 2008 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 76.00 | 401.40 | b | 665.00 | 1094.00 | 2236.40 | ||||
| 2009 | 1034.62 | c | 770.00 | 779.50 | 516.50 | 107.50 | 70.00 | 0.00 | 21.00 | 32.00 | 491.50 | 0.00 | z | 0.00 | z | 3822.62 | ||||||||||
| 2010 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 481.00 | 73.50 | 0.00 | j | 2.00 | m | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 554.50 | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1006.22 | 775.00 | 668.51 | 471.90 | 256.49 | 71.10 | 7.62 | 19.21 | 123.37 | 430.34 | 763.90 | 1025.85 | 5598.86 | |||||||||||||
| S.D. | 132.48 | 98.06 | 95.02 | 93.61 | 101.03 | 36.85 | 10.73 | 23.32 | 71.26 | 80.44 | 97.32 | 127.84 | 398.10 | |||||||||||||
| SKEW | -0.42 | 0.61 | 0.17 | 0.17 | 0.35 | 0.35 | 1.88 | 1.32 | 1.43 | -0.28 | 0.20 | 0.29 | -0.09 | |||||||||||||
| MAX | 1187.50 | 1050.52 | 872.13 | 701.00 | 481.00 | 150.50 | 43.50 | 82.00 | 340.50 | 606.00 | 959.00 | 1355.50 | 6215.50 | |||||||||||||
| MIN | 693.50 | 580.50 | 497.50 | 275.50 | 80.17 | 13.50 | 0.00 | 0.00 | 32.00 | 233.00 | 559.00 | 777.00 | 4957.50 | |||||||||||||
| NO YRS | 28 | 31 | 30 | 28 | 30 | 30 | 24 | 29 | 30 | 28 | 28 | 28 | 15 | |||||||||||||