YEAR(S | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1965 | 236.00 | 129.50 | 206.50 | 292.00 | 364.77 | a | 427.50 | 469.00 | 480.50 | b | 446.38 | a | 397.00 | 350.00 | 241.00 | 4040.15 | ||||||||||
1966 | 209.50 | 194.50 | 285.00 | 269.00 | 389.22 | d | 448.97 | a | 467.67 | b | 513.50 | 488.50 | 452.00 | 344.00 | 309.00 | 4370.86 | ||||||||||
1967 | 214.50 | 251.00 | 272.00 | 282.50 | 422.50 | 429.00 | 494.97 | a | 497.50 | 472.50 | 459.50 | 362.50 | 272.50 | 4430.97 | ||||||||||||
1968 | 238.00 | 227.00 | 312.50 | 361.00 | 398.00 | 446.00 | 479.50 | 510.00 | 503.00 | 462.86 | b | 420.00 | 273.50 | 4631.36 | ||||||||||||
1969 | 134.85 | a | 251.50 | 273.66 | b | 292.50 | 360.00 | 413.00 | 466.50 | 477.73 | c | 436.50 | 391.50 | 338.28 | a | 287.02 | b | 4123.03 | ||||||||
1970 | 264.02 | a | 190.00 | 297.00 | 323.04 | b | 276.50 | j | 335.00 | f | 444.50 | 503.50 | 440.69 | a | 432.50 | 343.50 | 347.50 | 3586.24 | ||||||||
1971 | 218.50 | 264.44 | a | 327.00 | 337.50 | 356.00 | 374.00 | 424.50 | 434.50 | 418.00 | 417.50 | 351.00 | 286.00 | 4208.94 | ||||||||||||
1972 | 199.50 | 191.09 | a | 254.41 | b | 277.00 | 341.50 | 375.52 | a | 427.91 | c | 454.31 | b | 426.00 | 414.50 | 330.00 | 192.95 | b | 3884.69 | |||||||
1973 | 222.17 | a | 182.00 | 298.12 | a | 286.50 | 336.50 | 376.00 | 421.08 | a | 420.00 | 399.00 | 402.00 | 339.50 | 259.48 | d | 3942.35 | |||||||||
1974 | 297.60 | a | 251.50 | 264.50 | 320.50 | 364.77 | a | 402.93 | a | 445.00 | 481.50 | 403.50 | 417.47 | a | 290.50 | 304.00 | 4243.76 | |||||||||
1975 | 200.50 | 173.50 | 227.00 | 238.45 | a | 262.98 | a | 319.50 | 407.50 | 437.10 | a | 402.41 | a | 401.50 | 328.93 | b | 212.50 | 3611.87 | ||||||||
1976 | 260.29 | b | 191.50 | 243.50 | 289.29 | b | 333.25 | a | 323.50 | 377.00 | 413.33 | a | 412.50 | 416.50 | 298.50 | 295.00 | 3854.16 | |||||||||
1977 | 278.50 | 272.50 | 320.33 | a | 301.00 | 348.50 | 372.93 | a | 409.50 | 466.00 | 432.50 | 434.00 | 348.00 | 259.00 | 4242.76 | |||||||||||
1978 | 207.00 | 168.50 | 264.00 | 280.50 | 366.32 | a | 407.00 | 485.50 | 497.50 | 480.50 | 428.50 | 328.00 | 281.67 | b | 4194.99 | |||||||||||
1979 | 219.50 | 204.50 | 237.00 | 275.50 | 350.00 | 259.50 | g | 428.32 | a | 447.95 | a | 466.50 | 457.00 | 353.50 | 312.50 | 3752.27 | ||||||||||
1980 | 248.50 | 219.50 | 336.50 | 349.14 | a | 415.00 | 425.50 | 470.50 | 469.00 | 473.50 | 449.00 | 381.50 | 327.00 | 4564.64 | ||||||||||||
1981 | 299.00 | 281.00 | 332.50 | 347.50 | 390.08 | a | 455.00 | 479.50 | 492.00 | 473.00 | 421.50 | 361.50 | 310.52 | a | 4643.10 | |||||||||||
1982 | 251.50 | 218.00 | 241.50 | 295.34 | a | 373.00 | 409.50 | 487.00 | 492.50 | 476.00 | 419.50 | 350.00 | 252.00 | 4265.84 | ||||||||||||
1983 | 229.50 | 205.00 | 283.13 | a | 301.50 | 349.27 | a | 409.66 | a | 441.00 | 451.50 | 399.00 | 399.12 | c | 351.00 | 264.53 | a | 4084.21 | ||||||||
1984 | 303.50 | 280.16 | a | 354.43 | a | 362.50 | 405.50 | 427.00 | 477.92 | a | 481.10 | e | 470.69 | a | 456.70 | c | 414.81 | d | 286.75 | c | 4721.05 | |||||
1985 | 241.59 | b | 261.92 | d | 291.29 | b | 302.59 | a | 351.52 | c | 294.00 | i | 488.52 | b | 483.82 | c | 442.50 | d | 427.59 | b | 287.50 | 259.22 | b | 3838.05 | ||
1986 | 238.04 | c | 207.20 | c | 352.07 | c | 356.00 | 412.00 | 422.88 | d | 486.00 | 524.42 | a | 494.42 | d | 457.25 | a | 424.04 | d | 299.50 | 4673.82 | |||||
1987 | 274.35 | a | 169.62 | b | 277.45 | a | 309.11 | b | 246.50 | f | 335.50 | f | 523.38 | a | 0.00 | z | 252.50 | n | 435.00 | 371.00 | 312.58 | a | 2672.49 | |||
1988 | 248.00 | b | 268.00 | 309.48 | a | 327.41 | a | 381.82 | a | 421.00 | 464.00 | 484.12 | a | 461.50 | 433.48 | a | 408.00 | 328.27 | c | 4535.08 | ||||||
1989 | 295.07 | d | 250.88 | c | 318.55 | b | 203.00 | g | 379.15 | e | 432.41 | a | 469.13 | a | 469.28 | b | 447.32 | b | 421.08 | a | 0.00 | z | 226.96 | c | 3709.85 | |
1990 | 284.68 | a | 196.00 | b | 265.50 | 348.00 | e | 365.11 | d | 416.50 | 463.50 | 507.88 | a | 402.00 | f | 477.92 | a | 371.00 | 292.90 | b | 3988.99 | |||||
1991 | 224.00 | 250.38 | b | 242.50 | 320.00 | 369.33 | b | 390.00 | 446.50 | 485.15 | a | 447.50 | 426.50 | 391.00 | 316.50 | 4309.36 | ||||||||||
1992 | 202.00 | 180.21 | a | 259.62 | c | 202.00 | i | 334.00 | 441.00 | 438.00 | 0.00 | z | 0.00 | z | 13.50 | z | 357.86 | b | 335.00 | 2547.70 | ||||||
1993 | 173.50 | 159.50 | 258.33 | a | 337.76 | a | 365.50 | 437.59 | a | 443.50 | 468.62 | a | 442.50 | 404.00 | 311.50 | 272.50 | 4074.79 | |||||||||
1994 | 169.50 | 217.78 | a | 235.00 | 304.00 | 396.00 | 415.00 | 473.00 | 490.50 | 485.00 | 474.50 | 410.00 | 290.50 | 4360.78 | ||||||||||||
1995 | 234.00 | 194.50 | 293.00 | 304.50 | 371.00 | 426.72 | a | 496.52 | a | 490.00 | 471.50 | 465.50 | 380.50 | 364.25 | a | 4491.99 | ||||||||||
1996 | 275.56 | d | 208.91 | b | 231.98 | a | 385.18 | b | 415.50 | 473.50 | 511.00 | 525.00 | 483.00 | 486.00 | 362.59 | a | 245.50 | 4603.71 | ||||||||
1997 | 193.75 | a | 283.50 | 318.50 | 326.50 | 330.50 | 465.00 | 487.00 | 514.00 | 499.00 | 459.00 | 316.00 | 278.50 | 4471.25 | ||||||||||||
1998 | 198.00 | 203.50 | 293.00 | 309.50 | 345.50 | 379.50 | 430.50 | 484.12 | a | 457.50 | 438.50 | 365.00 | 298.00 | 4202.62 | ||||||||||||
1999 | 255.50 | 239.00 | 296.00 | 312.50 | 367.50 | 398.00 | 423.50 | 476.00 | 443.28 | a | 302.00 | h | 366.72 | a | 291.00 | 3869.00 | ||||||||||
2000 | 245.50 | 260.50 | 324.00 | 298.97 | a | 407.50 | 444.50 | 479.90 | e | 512.03 | b | 454.50 | 472.50 | 385.50 | 304.50 | 4589.90 | ||||||||||
2001 | 298.50 | 248.50 | 317.50 | 356.00 | 266.50 | j | 323.50 | h | 495.00 | 507.50 | 485.50 | 439.68 | a | 339.50 | 335.50 | 3823.18 | ||||||||||
2002 | 254.00 | 217.50 | 279.50 | 327.50 | 401.45 | a | 460.00 | 486.50 | 520.59 | b | 462.50 | 431.13 | d | 366.92 | d | 209.50 | k | 4207.59 | ||||||||
2003 | 233.50 | 166.50 | i | 258.00 | f | 363.00 | 419.50 | 464.00 | 530.10 | a | 529.50 | 484.00 | 479.50 | 379.00 | 302.50 | 4184.60 | ||||||||||
2004 | 245.70 | d | 308.00 | 274.50 | 356.50 | 391.67 | e | 476.50 | 394.50 | f | 522.00 | 502.00 | 485.31 | b | 332.88 | d | 302.50 | 4197.57 | ||||||||
2005 | 247.48 | a | 247.33 | a | 257.00 | 368.00 | 439.50 | 451.55 | a | 494.50 | 490.32 | a | 492.50 | 425.00 | 375.50 | 287.78 | a | 4576.47 | ||||||||
2006 | 300.18 | a | 184.07 | a | 278.47 | b | 312.93 | a | 330.15 | a | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 0.00 | z | 1405.80 | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 239.64 | 222.04 | 283.02 | 317.70 | 371.83 | 418.28 | 463.36 | 484.77 | 457.28 | 437.68 | 357.18 | 287.96 | 4308.57 | |||||||||||||
S.D. | 38.88 | 40.36 | 35.81 | 32.55 | 34.10 | 37.21 | 33.35 | 28.84 | 30.32 | 26.44 | 33.14 | 35.38 | 281.43 | |||||||||||||
SKEW | -0.30 | 0.02 | 0.06 | 0.00 | -0.50 | -0.80 | -0.35 | -0.64 | -0.43 | 0.18 | 0.02 | -0.44 | -0.51 | |||||||||||||
MAX | 303.50 | 308.00 | 354.43 | 385.18 | 439.50 | 476.50 | 530.10 | 529.50 | 503.00 | 486.00 | 424.04 | 364.25 | 4721.05 | |||||||||||||
MIN | 134.85 | 129.50 | 206.50 | 238.45 | 262.98 | 319.50 | 377.00 | 413.33 | 399.00 | 391.50 | 287.50 | 192.95 | 3611.87 | |||||||||||||
NO YRS | 42 | 41 | 41 | 40 | 39 | 36 | 40 | 39 | 38 | 39 | 40 | 40 | 29 |