Mcmurdo 00Z 300hPa height 1956 - - - - - - - 8122.0 8104.6 8076.0 - - 1957 - - - 8232.8 8283.1 8209.2 8086.6 8120.1 8133.8 8247.2 8384.1 8572.7 1958 - - 8373.2 8386.6 8212.1 8169.5 8076.9 8115.4 7965.7 8125.9 8262.9 8372.6 1959 8544.1 8463.1 - - 8162.3 8151.1 8156.8 8184.1 7993.1 8087.4 8250.5 8454.0 1960 8558.4 8460.2 - - - - - - - - - - 1961 8490.0 8527.1 8335.0 8281.1 8238.7 8227.2 8113.3 8033.6 8198.0 8232.2 8320.7 - 1962 8415.8 8495.3 8322.3 8164.5 8109.9 8196.0 7989.2 8127.2 8183.8 8167.1 8378.6 8419.9 1963 8516.6 8437.1 8344.6 8230.4 8130.2 8102.8 8096.1 8249.6 8114.4 8090.7 8289.0 8478.1 1964 8544.0 8436.6 8352.0 8195.1 8039.5 8221.0 8301.3 8222.2 8059.9 8142.4 8390.0 8527.1 1965 8527.4 8602.9 8335.8 8236.4 8210.0 8183.4 8181.9 8016.5 8130.2 8197.0 8311.0 8542.3 1966 8470.6 8482.7 8480.9 8276.7 8210.5 8147.7 8183.6 7911.6 7993.5 8071.1 8340.9 8499.5 1967 8634.4 8542.2 8325.8 8215.2 8209.2 8179.3 8109.1 8019.8 8119.8 8132.1 8422.2 8542.9 1968 8530.8 8480.5 8337.1 8236.3 8298.7 8162.6 7985.6 8062.0 8096.5 8208.9 8377.6 8450.6 1969 8622.7 8411.7 8334.2 8322.5 8223.1 8291.9 8001.4 8034.3 8164.4 8154.4 8276.0 8482.8 1970 8556.9 8434.5 8372.6 8322.8 8118.2 8215.8 8224.3 8000.0 8139.4 8259.5 8284.9 8541.9 1971 8570.8 8450.8 - - 8296.6 8159.8 8135.1 8178.1 8146.2 8276.2 8338.5 8506.3 1972 8676.3 8527.3 8360.2 8373.0 8248.6 8318.8 8186.4 8195.2 8185.4 8086.6 8268.4 8531.1 1973 8596.8 8383.5 8273.1 8350.8 8353.9 8237.1 8210.2 8098.2 8179.3 8179.8 8396.0 8425.4 1974 8636.1 8405.8 8284.0 8165.6 8259.4 8372.8 8197.5 8330.3 8044.9 8227.1 8438.7 8582.2 1975 8578.4 8431.7 8361.7 8226.8 8314.2 8237.4 8223.3 8058.1 8034.4 8124.6 8389.4 8533.9 1976 8661.7 8490.6 8307.9 8161.7 8172.1 8126.7 8208.8 8100.3 8040.3 8020.8 8361.2 8662.3 1977 8674.7 8435.9 8298.1 8295.4 8224.0 8203.3 8136.6 8245.2 7996.2 8143.4 8281.7 8531.9 1978 8497.2 8512.2 8370.7 8289.7 8197.9 8183.8 8295.1 7971.4 8106.2 8141.6 8356.8 8453.3 1979 8491.3 8413.2 8238.6 8271.8 8179.7 8141.7 7978.1 8067.4 8082.2 8098.5 8347.6 8578.3 1980 8632.9 8487.4 8408.7 - 8249.2 8085.0 8233.8 8161.3 8266.5 8091.4 8408.5 8480.0 1981 8474.3 8492.3 8372.5 - 8167.6 8159.5 8156.7 8247.3 8246.7 - - - 1982 - - - 8127.2 8274.7 8095.0 8147.3 8049.0 - - 8295.9 8638.5 1983 - - - - 8356.2 8185.0 8156.9 - - - 8243.1 8572.5 1984 8658.5 8511.9 8336.9 - 8302.9 8125.0 7972.6 8116.0 8115.7 8173.9 8375.9 8578.7 1985 8651.2 8396.7 8370.5 8247.8 8176.0 8101.6 8012.0 8194.7 8025.4 8130.2 8255.4 8381.8 1986 - 8554.3 - - - - - - - 8137.9 8272.6 8516.1 1987 8638.9 8458.0 8323.8 8256.0 8202.5 - 8206.4 8062.9 8255.6 8223.2 8297.9 8485.4 1988 8525.5 8430.0 8265.2 8292.8 8226.2 8295.2 8177.5 8190.7 8195.3 8357.8 8348.7 8515.0 1989 8485.8 8465.2 8341.0 8347.5 8093.5 8058.1 8090.0 8088.5 8180.6 8228.4 8246.7 8586.9 1990 8553.3 8399.4 8263.3 8276.1 8329.4 8215.7 - 8084.3 8112.4 8311.8 - 8678.9 1991 8662.3 8553.8 - 8404.4 8248.2 8351.8 8295.0 8303.6 8240.6 8331.8 8433.0 8631.9 1992 8537.0 8520.8 8382.9 8252.3 8308.2 - 8140.0 8240.5 8024.1 8180.7 8380.6 8464.6 1993 8661.4 8467.5 8356.0 8225.0 8122.9 8032.7 7995.8 8122.1 8149.4 8125.0 8338.2 8449.2 1994 8515.3 8368.2 - - - 8279.5 8303.3 7940.0 - 8226.5 8387.5 8431.2 1995 8473.6 8432.7 - 8243.5 8147.5 8234.4 8327.2 8218.9 - 8191.2 8343.9 8414.6 1996 8446.5 8492.1 8378.0 8235.5 8137.0 - 8102.9 8247.3 8180.5 8092.6 8452.4 8517.8 1997 8507.5 8458.0 8303.3 - - - - - 8161.7 8293.8 8556.7 8521.1 1998 8472.8 8524.0 8452.7 8239.0 8317.7 8293.5 8234.7 8267.1 8266.0 8288.5 8277.6 8452.2 1999 8485.7 8435.4 8296.1 8210.4 8125.6 8364.6 8164.8 8149.3 8205.2 8119.0 8289.5 8391.9 2000 8440.0 8391.0 8309.0 8237.9 8221.4 8212.9 8170.7 8131.5 8256.8 8195.7 8389.6 8553.6 2001 8555.1 8465.0 8333.1 8231.3 8227.8 8194.7 8200.4 8080.2 8148.5 8170.0 8285.6 8453.3 2002 8557.3 8380.4 8452.3 8205.7 8353.2 8318.9 8160.6 8031.9 8298.5 8311.5 8403.6 8452.7 2003 8631.7 8495.0 8333.2 8189.4 8185.1 8264.8 8164.9 8104.7 8182.7 8142.5 8367.8 8609.3 2004 8578.6 8612.1 8300.0 8193.8 8145.9 8237.5 7979.4 8173.0 8142.3 8199.7 8353.8 8574.7 2005 8575.2 8440.0 8302.0 8171.7 8212.7 8275.1 8187.4 8108.6 8171.1 8239.1 8341.0 8648.5 2006 8548.6 8460.9 8366.5 8277.0 8137.6 8133.4 8071.7 - 8173.1 8216.2 8385.9 8430.5 2007 8612.1 8457.7 8459.4 8267.9 8326.4 8243.8 8297.8 8161.8 8125.0 8226.9 8339.7 8406.5 2008 8550.1 8341.8 8320.7 8359.2 8216.3 8187.2 8080.2 8104.7 8120.9 8181.0 8314.1 8480.6 2009 8476.9 8446.9 8298.4 8244.3 8284.1 8226.5 8297.0 8221.6 8149.5 8149.9 8374.0 8445.2 2010 8673.1 8512.3 8408.6 8239.3 8176.4 8098.9 7991.0 8007.7 8141.3 8194.9 8275.5 8517.5 2011 8540.0 8461.8 8390.4 8321.4 8198.5 8212.2 8219.5 8246.3 8264.8 8184.1 8433.7 8417.4 2012 8445.8 8456.3 8324.4 8182.6 8214.0 8242.2 8080.0 8160.4 8144.8 8196.9 8408.9 8566.9 2013 8612.3 8395.2 8258.3 8192.5 8245.7 8231.4 8033.2 8285.7 8323.7 8223.5 8270.0 8504.7 2014 8643.0 - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - 8360.0 8249.5 8183.0 8086.2 8075.5 8067.6 8086.0 8280.9 8270.0 8435.5 2018 8486.8 8396.0 8334.5 8346.1 8154.4 8182.9 8193.6 8231.5 8110.4 8171.1 8320.4 8453.5 2019 8501.4 8489.6 8385.7 8244.1 8249.0 8023.0 8289.6 8205.7 8055.0 8193.9 8480.4 8591.9 2020 8548.8 8478.7 8229.1 8244.8 8163.8 8078.4 8233.8 8147.4 8151.7 8114.2 8239.6 8411.6 2021 8436.3 8395.5 8317.5 8165.7 8123.6 8128.2 8227.2 8234.1 8066.5 8235.7 8256.0 8361.9 2022 8433.1 8464.5 8333.0 8236.2 8196.5 8296.2 8135.2 8099.6 8094.4 8210.7 8275.2 8383.3 2023 8402.1 8386.8 8338.8 8357.5 8170.0 8213.8 8131.1 8040.7 8173.5 8107.4 8289.1 8395.0 2024 8452.3 8378.5 8272.5 8099.5 - - - - - - - -