Davis 00Z 300hPa height 1959 - - - 8275.6 8340.4 8385.9 8221.7 8273.1 8148.8 8330.7 8321.8 8604.8 1960 8587.4 8540.8 8305.0 8384.1 8318.7 8198.9 8175.0 8239.0 8141.1 8292.1 8376.2 - 1961 - 8601.5 8444.4 8442.8 8361.3 8395.4 8209.3 8223.0 8384.8 8348.0 8485.4 8421.9 1962 8452.2 8518.5 8364.5 8334.5 8290.0 8477.5 8157.9 8086.9 8216.0 8219.7 8441.3 8514.2 1963 8569.7 8490.0 8389.0 8311.8 8345.2 8310.4 8232.6 8449.3 8319.3 8202.6 8287.0 8599.4 1964 8657.1 8544.1 8440.7 8352.4 8247.4 8431.1 8480.6 8287.1 8109.7 8233.7 - - 1965 - - - - - - - - - - - - 1966 - - - - - - - - - - - - 1967 - - - - - - - - - - - - 1968 - - - - - - - - - - - - 1969 - - - 8378.5 8364.6 - 8131.5 8070.7 8176.9 8287.0 8442.9 8608.5 1970 8561.9 8462.5 8566.8 8426.9 8404.7 8289.7 8288.3 8182.1 8219.3 8250.7 8404.5 8608.7 1971 8707.1 8614.6 8413.2 8391.0 8370.6 8190.0 8231.9 8232.8 8283.3 8300.0 8394.0 8681.9 1972 8673.0 8538.6 8458.7 8405.4 8296.6 8276.4 8292.0 8415.4 8315.2 8300.0 8365.3 8561.3 1973 8618.4 8517.4 8347.0 8382.8 8450.0 8353.0 8175.5 8146.3 8296.6 8333.5 8437.9 8485.7 1974 8581.3 8531.8 8372.4 8410.0 8281.7 8339.7 8275.5 8336.0 8159.3 8330.6 8500.3 8665.8 1975 8649.4 8562.9 8473.2 8322.3 8427.1 8365.3 8297.2 8192.3 8201.1 8264.0 8428.3 8562.6 1976 8651.9 8529.7 8424.5 8288.3 8211.3 8241.7 8190.3 8158.1 8119.7 8207.4 8474.7 8707.4 1977 8656.5 8566.8 8374.3 8311.7 8378.6 8359.3 8338.7 8367.0 8085.0 8223.0 8392.3 8509.0 1978 8493.0 8512.5 8482.7 8377.0 8377.7 8247.9 8333.9 8066.5 8234.1 8232.9 8470.0 8502.2 1979 8631.1 8515.0 8327.4 8428.3 8276.0 8197.5 8145.4 8148.2 8204.2 8227.9 8528.2 8580.0 1980 8643.0 8555.0 8455.2 8502.7 8250.3 8229.6 8328.7 8326.3 8321.0 8223.0 8470.3 8560.3 1981 8578.3 8565.9 8491.7 8386.6 8265.2 8226.3 8321.3 8339.3 8245.0 8183.9 8382.7 8579.3 1982 8572.5 8512.9 8316.7 8202.0 8236.5 8187.7 8214.5 8114.3 8102.6 8217.7 8513.7 8693.2 1983 8601.9 8522.1 8434.5 8307.3 8351.6 8288.6 8195.7 8199.0 8240.7 8233.8 8303.7 8486.5 1984 8629.0 8511.7 8429.7 8366.8 8404.5 8255.5 8162.3 8254.2 8195.0 8122.9 8416.0 8676.1 1985 8695.0 8507.5 8405.5 8406.3 8307.6 8408.0 8091.4 8176.6 8186.2 8208.3 8278.3 8484.3 1986 8614.5 8662.5 8511.0 8340.3 8389.0 8268.7 8191.9 8165.8 8170.7 8204.0 8390.3 8503.2 1987 8668.7 8546.8 8425.3 8396.0 8259.4 8309.3 8273.9 8061.3 8145.7 8251.0 8423.3 8527.7 1988 8651.6 8413.1 8441.1 - - 8403.5 8232.7 8202.4 8323.9 8389.6 8393.7 8512.0 1989 8589.3 8539.6 8395.9 8337.0 8155.2 8253.9 8216.6 8293.3 8285.7 8293.7 8410.8 8604.3 1990 8644.0 8541.9 8426.8 8515.2 8425.0 8288.6 8473.2 8171.7 8093.1 8323.9 8457.9 8564.7 1991 8514.9 8539.4 8488.6 8384.8 8328.5 8416.1 8446.8 8236.9 8248.5 8226.1 8412.1 8664.6 1992 8606.9 8593.0 8470.8 8375.3 8472.9 8388.6 8252.5 8165.8 8085.0 8272.4 8385.5 8444.0 1993 8702.5 8475.2 8418.2 8338.5 8152.0 8210.0 8183.5 8136.5 8172.4 8227.3 8355.7 8497.4 1994 8560.0 8458.8 8381.8 8328.3 8340.0 - 8326.8 8146.3 8236.1 8252.0 8499.2 8453.3 1995 8535.7 8560.4 8420.1 8436.6 8282.1 8278.4 8446.3 8217.0 8084.3 8248.0 8435.0 8499.4 1996 8601.6 8600.5 8422.6 8378.5 8225.3 8363.0 8269.4 8300.4 8364.0 8285.4 8464.7 8564.6 1997 8583.7 8512.3 8399.8 8377.4 8261.0 8317.4 8135.6 8197.1 8097.3 8284.8 8439.6 8622.3 1998 8546.2 8523.6 8419.7 8205.1 8259.5 8275.1 8245.5 8191.1 8272.1 8267.4 8368.0 8434.0 1999 8558.1 8514.4 8448.0 8239.7 8276.8 8404.0 8191.9 8183.0 8229.6 8166.8 8376.5 8391.3 2000 8504.4 8486.4 8405.7 8438.3 8256.6 8424.4 8254.6 8217.6 8309.4 8145.8 8462.9 8639.0 2001 8591.2 8619.9 8445.7 8257.1 8319.9 8272.1 8276.5 8152.1 8159.8 8233.5 8363.0 8501.6 2002 8531.1 8461.3 8492.8 8377.7 8491.0 8306.3 8300.9 8181.6 8281.0 8406.2 8417.5 8493.5 2003 8691.2 8587.6 8447.6 8293.5 8313.1 8348.6 8270.0 8172.9 8260.9 8228.4 8429.3 8606.9 2004 8617.3 8658.4 8388.4 8329.6 8348.2 8214.4 - 8111.6 8126.4 8328.7 8430.3 8609.0 2005 8584.4 8564.9 8501.0 8271.0 8351.2 8382.8 8271.4 8187.8 8219.7 8285.1 8383.3 8708.6 2006 8557.4 8515.8 8404.4 8376.0 8267.5 8245.3 8100.5 8323.7 8259.2 8259.7 8391.9 8478.1 2007 8632.1 8485.2 8411.3 8471.2 8410.3 8410.3 8403.9 8289.6 8209.9 8306.2 8450.6 8501.2 2008 8494.0 8482.2 8439.6 8416.5 8389.1 8192.0 8327.8 8108.1 8196.7 8168.9 8369.3 8511.6 2009 8604.2 8618.9 8470.2 8400.7 8382.2 8447.0 8331.7 8253.4 8296.6 8262.6 8463.7 8517.2 2010 8668.8 8618.6 8459.1 8333.1 8289.4 8186.9 8091.0 8117.8 8276.0 8249.2 8399.3 8541.4 2011 8699.8 8483.9 8441.1 8409.1 8285.1 8393.8 8370.9 8216.2 8282.5 8232.9 8557.2 8409.6 2012 8506.8 8562.9 8402.7 8369.7 8304.9 8275.6 8147.5 8204.7 8168.2 8317.6 8541.4 8632.9 2013 8664.5 8523.9 8347.1 8351.0 8238.0 8390.8 8242.9 8313.7 8390.8 8381.5 8529.8 8559.5 2014 8611.4 8516.5 8439.5 8282.1 8443.4 8264.8 8241.0 8177.7 8306.2 8288.8 8436.2 8483.1 2015 8592.8 8472.2 8472.9 - - - - - - 8229.0 8383.5 8543.1 2016 8525.2 8538.5 8380.0 8385.2 8270.0 8193.8 8219.3 8324.5 8184.3 8326.8 8509.0 8571.7 2017 8643.7 8526.8 8431.3 8243.6 8296.7 8256.9 8305.9 8162.4 8166.6 8274.5 8467.2 8542.9 2018 8615.8 8591.6 8470.8 8473.6 8253.8 8381.4 8286.3 8346.9 8151.7 8204.3 8362.9 8553.3 2019 8575.2 8638.1 8449.7 8420.7 8333.2 8307.2 8264.2 8223.3 8189.0 8421.3 8576.7 8668.7 2020 8693.5 8550.0 8361.6 8399.7 8375.7 8352.5 8334.0 8324.1 8260.3 8318.6 8494.3 8493.9 2021 8523.9 8479.3 8446.5 8349.3 8277.0 8225.2 8278.3 8236.1 8185.0 8301.6 8397.7 8478.4 2022 8573.3 8480.8 8441.3 8337.9 8326.8 8435.4 8216.3 8303.5 8145.0 8314.0 8321.8 8437.0 2023 8470.3 8528.9 8544.3 8432.8 8300.6 8354.5 8244.5 8177.7 8313.4 8282.9 8365.3 8525.5 2024 8573.7 8511.0 8420.0 8325.7 - - - - - - - -