| YEAR(S | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1953 | 521.50 | 464.50 | 561.50 | 583.00 | 696.50 | 792.00 | 924.83 | a | 913.50 | 842.50 | 808.00 | 742.50 | 553.50 | 8403.83 | ||||||||||||
| 1954 | 486.00 | 415.50 | 464.00 | 479.50 | 625.68 | a | 796.50 | 861.36 | c | 888.67 | a | 830.50 | 814.50 | 661.50 | 598.00 | 7921.71 | ||||||||||
| 1955 | 502.50 | 429.00 | 463.50 | 526.50 | 715.50 | 833.50 | 873.00 | 865.00 | 830.17 | a | 777.58 | a | 628.00 | 545.50 | 7989.76 | |||||||||||
| 1956 | 299.00 | j | 452.50 | 493.50 | 529.50 | 629.50 | 777.93 | a | 825.50 | 859.00 | 880.00 | 798.00 | 607.00 | 522.00 | 7374.43 | |||||||||||
| 1957 | 266.50 | j | 417.50 | 509.50 | 509.00 | 647.00 | 806.90 | a | 608.00 | j | 895.50 | 839.00 | 667.00 | 562.00 | 584.50 | 6437.90 | ||||||||||
| 1958 | 489.00 | 393.00 | 468.00 | 536.50 | 648.00 | 701.00 | 814.50 | 602.00 | j | 581.50 | j | 788.50 | 612.00 | 534.50 | 5985.00 | |||||||||||
| 1959 | 399.00 | 395.00 | 546.50 | 458.00 | 612.00 | 761.50 | 875.50 | 910.00 | 864.00 | 731.50 | 598.50 | 580.00 | 7731.50 | |||||||||||||
| 1960 | 369.50 | j | 401.50 | 489.50 | 528.50 | 679.42 | a | 835.00 | 869.03 | a | 636.50 | i | 869.00 | 737.50 | 646.00 | 546.00 | 6601.45 | |||||||||
| 1961 | 487.00 | 499.50 | 509.50 | 388.50 | 558.50 | 749.50 | 847.00 | 880.00 | 872.50 | 773.50 | 689.50 | 603.50 | 7858.50 | |||||||||||||
| 1962 | 465.50 | 424.00 | 492.50 | 479.00 | 592.50 | 689.50 | 829.50 | 906.00 | 894.00 | 809.50 | 707.07 | a | 574.50 | 7863.57 | ||||||||||||
| 1963 | 510.50 | 414.00 | 513.50 | 510.00 | 683.50 | 808.00 | 839.00 | 884.00 | 901.00 | 863.00 | 703.50 | 518.00 | 8148.00 | |||||||||||||
| 1964 | 583.00 | 531.00 | 524.50 | 461.50 | 643.50 | 742.50 | 853.50 | 863.00 | 863.00 | 824.00 | 646.50 | 483.00 | 8019.00 | |||||||||||||
| 1965 | 403.50 | 418.00 | 467.50 | 468.46 | d | 446.50 | f | 732.00 | 836.00 | 880.50 | 552.00 | j | 539.50 | j | 470.50 | h | 518.98 | b | 4724.94 | |||||||
| 1966 | 517.50 | 396.00 | 534.50 | 528.50 | 565.00 | 478.00 | j | 817.50 | 859.50 | 847.50 | 764.50 | 620.00 | 384.50 | j | 6450.50 | |||||||||||
| 1967 | 589.00 | 409.00 | 390.00 | 544.50 | 613.00 | 738.00 | 829.00 | 901.00 | 904.50 | 865.00 | 734.00 | 579.50 | 8096.50 | |||||||||||||
| 1968 | 444.50 | 370.00 | 423.50 | 457.00 | 648.50 | 760.50 | 897.00 | 945.00 | 864.00 | 726.50 | 528.00 | 544.00 | 7608.50 | |||||||||||||
| 1969 | 406.50 | 427.00 | 496.50 | 597.00 | 763.50 | 755.00 | 898.00 | 885.50 | 841.50 | 768.00 | 615.50 | 570.50 | 8024.50 | |||||||||||||
| 1970 | 478.00 | 430.50 | 0.00 | z | 605.50 | 641.50 | 874.00 | 909.50 | 922.50 | 836.50 | 774.00 | 664.50 | 677.00 | 7813.50 | ||||||||||||
| 1971 | 447.50 | 503.00 | 0.00 | z | 658.50 | 749.00 | 774.00 | 846.00 | 889.00 | 855.00 | 0.00 | z | 671.50 | 468.00 | 6861.50 | |||||||||||
| 1972 | 455.50 | 436.50 | 429.50 | 492.50 | 657.00 | 767.00 | 864.00 | 899.50 | 848.50 | 726.50 | 672.50 | 505.00 | 7754.00 | |||||||||||||
| 1973 | 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 | |
| 1974 | 315.00 | m | 450.00 | g | 0.00 | z | 75.50 | z | 0.00 | z | 0.00 | z | 117.50 | z | 555.50 | l | 857.14 | b | 0.00 | z | 0.00 | z | 86.00 | z | 857.14 | |
| 1975 | 0.00 | z | 475.42 | d | 276.00 | p | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 733.50 | 0.00 | z | 1208.92 | ||
| 1976 | 151.50 | u | 25.00 | z | 528.00 | 165.50 | u | 0.00 | z | 0.00 | z | 471.00 | n | 0.00 | z | 876.00 | 0.00 | z | 141.00 | x | 0.00 | z | 1404.00 | |||
| 1977 | 411.50 | 0.00 | z | 451.00 | 526.00 | 683.50 | 825.50 | 842.00 | 870.50 | 819.00 | 807.50 | 595.50 | 494.50 | 7326.50 | ||||||||||||
| 1978 | 0.00 | z | 421.00 | 482.00 | 519.00 | 590.00 | 823.50 | 903.00 | 0.00 | z | 926.50 | 850.00 | 695.00 | 0.00 | z | 6210.00 | ||||||||||
| 1979 | 554.50 | 477.50 | 566.00 | 0.00 | z | 686.00 | 793.00 | 0.00 | z | 0.00 | z | 936.00 | 915.50 | 685.00 | 0.00 | z | 5613.50 | |||||||||
| 1980 | 0.00 | z | 0.00 | z | 589.00 | 598.00 | 712.50 | 827.59 | a | 968.50 | 965.13 | a | 934.50 | 897.00 | 739.00 | 589.00 | 7820.22 | |||||||||
| 1981 | 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 | |
| 1982 | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 33.00 | z | 96.00 | z | 321.00 | s | 716.50 | 562.50 | 1279.00 | |||
| 1983 | 486.50 | 446.50 | 484.00 | 519.50 | 669.00 | 885.00 | 968.50 | 923.00 | 760.50 | f | 934.50 | 756.35 | d | 604.50 | 7677.35 | |||||||||||
| 1984 | 555.50 | 564.50 | 592.00 | 712.00 | 0.00 | z | 966.00 | 1019.50 | 1028.50 | 946.00 | 844.50 | 439.00 | n | 564.50 | 7793.00 | |||||||||||
| 1985 | 0.00 | z | 0.00 | z | 552.00 | 598.50 | 781.00 | 878.50 | 916.00 | 960.00 | 930.50 | 0.00 | z | 647.00 | 599.50 | 6863.00 | ||||||||||
| 1986 | 552.00 | 422.50 | 503.00 | 546.50 | 553.00 | 818.50 | 920.50 | 943.50 | 886.00 | 855.50 | 698.00 | 622.50 | 8321.50 | |||||||||||||
| 1987 | 536.00 | 439.50 | 537.00 | 0.00 | z | 679.00 | 795.50 | 973.50 | 1038.50 | 928.50 | 838.50 | 709.50 | 605.50 | 8081.00 | ||||||||||||
| 1988 | 551.50 | 473.50 | 576.50 | 588.00 | 0.00 | z | 895.50 | 0.00 | z | 966.50 | 0.00 | z | 906.00 | 0.00 | z | 655.50 | 5613.00 | |||||||||
| 1989 | 598.00 | 430.50 | 527.50 | 0.00 | z | 717.50 | 823.50 | 929.50 | 964.00 | 899.00 | 830.50 | 633.50 | 604.00 | 7957.50 | ||||||||||||
| 1990 | 543.50 | 425.00 | 560.50 | 497.00 | 684.50 | 813.50 | 919.31 | b | 33.00 | z | 944.00 | 847.00 | 658.50 | 0.00 | z | 6892.81 | ||||||||||
| 1991 | 512.00 | 399.00 | 543.50 | 626.50 | 726.00 | 832.00 | 93.50 | z | 984.25 | a | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 4623.25 | |||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 499.52 | 438.77 | 508.42 | 535.75 | 661.70 | 802.25 | 885.17 | 917.54 | 878.88 | 811.85 | 663.79 | 565.79 | 7980.07 | |||||||||||||
| S.D. | 57.61 | 42.78 | 49.00 | 67.45 | 58.47 | 58.39 | 53.17 | 48.73 | 38.29 | 62.90 | 55.66 | 48.97 | 228.08 | |||||||||||||
| SKEW | -0.16 | 1.14 | -0.33 | 0.45 | -0.01 | 0.49 | 0.69 | 0.92 | 0.35 | -0.09 | -0.37 | 0.05 | 0.29 | |||||||||||||
| MAX | 598.00 | 564.50 | 592.00 | 712.00 | 781.00 | 966.00 | 1019.50 | 1038.50 | 946.00 | 934.50 | 756.35 | 677.00 | 8403.83 | |||||||||||||
| MIN | 399.00 | 370.00 | 390.00 | 388.50 | 553.00 | 689.50 | 814.50 | 859.00 | 819.00 | 667.00 | 528.00 | 468.00 | 7608.50 | |||||||||||||
| NO YRS | 27 | 31 | 32 | 30 | 30 | 32 | 29 | 28 | 30 | 29 | 31 | 29 | 13 | |||||||||||||