Halley 12Z 300hPa height 1957 - - - 8465.0 8277.2 8187.3 8152.2 8197.1 8307.1 8326.7 8504.1 8593.9 1958 8535.2 8558.9 8379.4 8365.7 8255.5 8239.3 8223.4 8114.2 8164.0 8251.6 8412.0 8413.9 1959 8560.3 8483.6 8453.2 8316.5 8354.3 8335.3 8129.6 8253.2 8149.6 8250.9 8230.0 8564.8 1960 8500.0 8514.8 8335.2 8366.3 8343.9 8284.7 8216.6 8170.0 8297.3 8314.6 8347.5 8470.7 1961 8612.9 8570.7 8435.8 8342.4 8355.0 8283.7 8200.6 8201.0 8294.7 8257.7 8419.3 8440.0 1962 8529.4 8497.4 8395.8 8328.3 8329.7 8346.7 8194.1 8200.7 8244.3 8287.8 8409.3 8449.7 1963 8578.2 8444.6 8337.5 8279.7 8371.4 8233.0 8228.4 8358.1 8293.7 8283.4 8353.7 8536.0 1964 8706.7 8581.5 8404.8 8320.0 8134.8 8441.2 8421.6 8169.3 8119.0 8232.0 8481.3 8501.0 1965 8591.6 8596.5 8428.7 8337.9 8404.8 8179.0 8242.6 8282.3 8270.0 8324.8 8365.7 8603.9 1966 8547.1 8598.3 8514.4 8320.7 8384.7 8274.0 8220.7 8122.3 8173.8 8267.7 8445.7 8558.1 1967 8676.3 8531.1 8447.1 8379.3 8353.0 8308.6 8161.1 8212.3 8247.6 8249.6 8338.3 8575.8 1968 8530.0 8567.2 8501.4 8421.7 8386.7 8219.2 8199.3 8162.3 8130.0 8407.3 8467.7 8554.2 1969 8622.6 8532.5 8367.7 8414.4 8308.0 8252.3 8154.2 8226.0 8291.7 8271.8 8366.6 8619.7 1970 8551.0 8511.9 8428.4 8373.2 8352.6 8246.7 8278.6 8171.4 8355.0 8366.9 8451.8 8587.1 1971 8621.8 8466.7 8432.6 8508.6 8325.7 8239.3 8230.4 8316.2 8206.7 8280.8 8410.7 8580.0 1972 8583.9 8530.7 8431.3 8383.2 8375.7 8233.9 8336.9 8296.8 8245.5 8300.0 8417.9 8562.9 1973 8605.0 8483.6 8377.7 8283.8 8344.0 8293.7 8175.9 8218.4 8233.4 8379.3 8399.3 8473.5 1974 8594.0 8479.2 8432.1 8362.8 8232.3 8329.3 8175.5 8320.7 8152.5 8311.6 8452.8 8575.7 1975 8637.3 8551.5 8427.6 8243.8 8319.5 8195.7 8266.0 - - - - 8608.6 1976 8624.2 8533.1 8454.4 8370.0 8276.0 8306.2 8235.7 8099.4 8160.0 8188.3 8472.9 8701.4 1977 8595.0 8477.3 8444.5 8500.0 - 8370.0 8188.3 8269.2 8119.1 8256.8 8428.1 8471.4 1978 8550.0 8457.1 8462.1 8495.7 8425.0 8313.3 8231.9 8164.4 8198.0 8334.8 8427.2 8496.0 1979 8612.4 8481.2 8453.8 8383.5 8240.0 8241.4 8094.5 8177.0 8263.2 8276.3 8427.2 8616.1 1980 8570.0 8587.2 8429.0 8342.7 8275.2 8256.9 8200.7 8208.5 8298.9 8291.4 8429.3 8545.0 1981 - 8547.8 8533.3 8395.0 8336.3 8216.5 8272.1 - - - - - 1982 - - 8392.9 8285.8 8321.4 8323.8 8152.1 8131.2 8178.6 8320.6 8441.3 8616.9 1983 8587.5 8561.9 8405.9 8420.5 8486.5 8316.3 8216.0 8220.0 8254.7 8255.8 8391.5 8534.3 1984 - 8563.3 8412.2 8389.0 8397.3 8225.3 8284.3 8303.8 8298.9 8290.3 8408.6 8701.5 1985 8674.5 8552.2 8485.7 8381.0 8306.7 8295.4 8156.4 8288.9 8225.9 8326.0 8317.2 8511.6 1986 8643.2 8695.9 8542.4 8402.1 8283.2 8298.7 8283.1 8147.8 8113.4 8228.9 8394.5 8529.3 1987 8653.6 8752.5 8443.5 8403.1 8355.7 8325.0 8266.3 8115.0 8231.7 8286.3 8371.4 8584.3 1988 8636.3 8498.9 8501.6 8365.7 8371.0 8352.8 8185.0 8351.9 8408.5 8469.7 8445.6 8547.3 1989 8647.4 8526.9 8507.7 8306.1 8218.1 8289.6 8271.3 8361.6 8327.2 8316.5 8456.9 8541.0 1990 8639.2 8492.0 8485.5 8439.0 8434.9 8371.0 8299.8 8213.3 8248.6 8343.4 8441.5 8534.2 1991 8568.2 8621.2 8389.4 8452.6 8286.9 8281.0 8247.3 8220.4 8365.2 8303.9 8438.7 8699.2 1992 - 8564.1 8321.0 8424.8 8382.5 8305.5 8212.4 8125.9 8267.2 8419.1 8375.0 8594.0 1993 8650.1 8507.9 8430.5 8338.3 8278.8 8229.7 8234.3 8222.3 8186.1 8246.5 8505.8 8505.2 1994 8588.4 8474.4 8426.3 8348.7 8330.5 8395.6 8180.1 8162.9 8305.2 8179.8 8482.2 8459.1 1995 8582.3 8483.2 8467.8 8337.0 8271.0 8332.4 8248.6 8172.0 8197.4 8376.8 8393.8 8488.3 1996 8566.9 8606.2 8436.8 8383.0 8318.5 8286.5 8182.6 8383.6 8299.1 8307.3 8464.4 8573.9 1997 8643.0 8491.3 8364.9 8379.9 8236.7 8252.0 8152.4 8189.3 8136.7 8203.6 8441.1 8558.6 1998 8624.8 8584.2 8440.4 8277.3 8253.7 8326.9 8242.2 8232.4 8254.9 8277.5 8400.7 8519.0 1999 8623.7 8582.5 8493.1 8322.2 8380.1 8371.0 8231.9 8163.4 8243.0 8322.7 8466.6 8425.0 2000 8457.8 8518.0 8514.7 8343.7 8326.8 8309.2 8329.2 8190.6 8238.9 8292.6 8463.0 8542.6 2001 8544.6 8559.0 8389.8 8269.3 8439.2 8208.1 8215.0 8140.1 8305.6 8184.6 8360.7 8459.2 2002 8579.7 8483.8 8486.6 8414.5 8318.3 8211.4 8249.2 8266.2 8288.0 8344.6 8370.7 8538.0 2003 8658.9 8593.6 8445.9 8321.2 8273.4 8272.2 8195.8 8217.4 8290.2 8326.7 8388.2 8596.6 2004 8561.7 8488.0 8442.1 8377.3 8326.3 8239.7 8177.3 8112.4 8349.0 8373.8 8419.9 8578.6 2005 8624.5 8499.7 8484.7 8383.5 8291.8 8255.7 8186.8 8257.6 8305.6 8354.4 8424.8 8601.6 2006 8564.9 8465.6 8541.8 8374.4 8199.0 8328.5 8236.6 8203.6 8233.1 8293.5 8428.7 8497.3 2007 8647.7 8477.8 8442.6 8339.7 8392.3 8362.5 8330.7 8238.6 8320.0 8297.1 8399.6 8461.4 2008 8513.7 8458.8 8421.6 8443.3 8348.5 8219.4 8254.2 8173.3 8384.2 8230.9 8346.5 8397.4 2009 8493.6 8494.7 8461.3 8308.9 8372.0 8312.4 8255.3 8259.5 8259.7 8233.2 8429.9 8520.8 2010 8677.4 8579.4 8432.5 8298.2 8364.5 8317.1 8215.4 8253.6 8329.9 8333.5 8394.3 8560.2 2011 8652.3 8570.9 8512.4 8411.6 8323.4 8293.7 8282.3 8296.8 8267.2 8284.7 8432.3 8375.9 2012 8471.0 8554.6 8450.8 8401.8 8345.1 8242.1 8237.2 8212.1 8245.7 8271.6 8457.8 8619.9 2013 8607.7 8456.2 8411.0 8376.7 8253.5 8401.1 8249.6 8333.5 8370.0 8277.4 8348.5 8556.8 2014 8554.9 8500.4 8402.0 8453.4 8429.2 8307.9 8207.2 - - 8293.7 8349.7 8462.4 2015 8493.0 8498.8 8403.5 8354.8 8344.4 8226.4 8176.9 8125.1 8133.4 8322.4 8363.5 8561.3 2016 8521.3 8537.0 8381.8 8347.7 8269.6 8243.0 8193.8 8251.7 8191.4 8299.1 8513.5 8550.2 2017 8615.3 8574.7 - - - - - - - - - 8577.5 2018 8524.9 8416.9 - - - - - - - - - 8590.0 2019 8523.1 8474.4 - - - - - - - - - 8702.1 2020 8622.5 - - - - - - - - - - - 2021 - - - - - - - - - - - 8413.3 2022 8643.4 - - - - - - - - - - 8466.0 2023 8528.0 - - - - - - - - - - 8348.8 2024 8584.0 - - - - - - - - - - -