Mcmurdo 12Z 300hPa height 1956 - - - - - - - 8068.0 8161.3 8060.5 - - 1957 - - - 8229.5 8282.9 8217.2 8085.3 8139.2 8127.0 8245.5 8381.9 8554.2 1958 - - 8364.0 8368.8 8211.9 8168.3 8096.9 8097.4 7947.5 8126.3 8258.0 8358.0 1959 8530.0 8456.0 8307.8 - 8209.6 8164.9 8148.8 8159.2 7994.8 8076.6 8242.0 8455.0 1960 8546.2 8437.0 - - - - - - - - - - 1961 8471.3 8511.8 8333.3 8291.0 8239.1 8245.2 8104.9 8031.9 8187.1 8197.3 8310.4 - 1962 8398.0 8483.5 8336.7 8165.7 8116.6 8148.0 7999.8 8145.4 8187.2 8172.9 8379.1 8407.3 1963 8508.6 8416.2 - - - - - - - 8107.2 8276.6 8470.0 1964 8536.2 8382.0 - - - - - - - 8133.5 8387.6 8514.8 1965 8514.9 8603.8 - - - - - - - 8179.2 8309.6 8558.3 1966 8468.1 8484.3 - - - - - - - 8068.4 8338.5 8496.7 1967 8624.1 8553.5 - - - - - - - 8126.5 8422.3 8543.9 1968 8515.0 8484.8 - - - - - - - 8217.8 8369.1 8451.5 1969 8617.0 8424.9 - - - - - - - 8137.4 8264.7 8475.5 1970 8553.1 8437.9 - - - - - - - 8249.0 8272.0 8526.7 1971 8566.8 8435.7 - - - - - - - 8261.5 8341.1 8493.0 1972 8675.2 8511.2 - - - - - - - 8074.7 8251.4 8526.8 1973 8579.8 8406.4 - - - - - - - 8186.2 8379.5 8423.1 1974 8627.6 8361.5 - - - - - - - 8213.6 8429.1 8583.5 1975 8568.7 8430.1 - - - - - - - 8115.6 8381.9 8531.7 1976 8653.9 8467.5 - - - - - - - 8031.3 8356.0 8655.3 1977 8652.4 8452.8 - - - - - - - 8128.9 8266.4 8525.2 1978 8486.6 8493.8 - - - - - - - 8132.4 8341.0 8437.7 1979 8483.7 - - - 8079.5 8048.5 - - - - 8357.6 8571.3 1980 8622.8 8492.2 - - - - - - - 8092.0 8417.3 8472.6 1981 8491.7 8511.2 - - - - - - - - - - 1982 - - - - - - - - - 8185.5 8381.9 8590.0 1983 - - - - - - - - - - 8215.2 8533.9 1984 8660.4 8555.5 - - - - - - - 8168.7 8364.0 8560.2 1985 8655.7 8464.6 - - - - - - - 8127.5 8204.4 8359.5 1986 - 8548.1 - - - - - - - 8172.9 8294.0 8481.9 1987 8612.2 8466.9 - - - - - - - 8213.9 8290.7 8482.1 1988 8523.9 8419.6 - - - - - - - 8358.8 8358.3 8488.5 1989 8491.9 8495.0 - - - - - - - 8199.5 8276.4 8592.5 1990 8542.9 8379.3 - - - - - - 8083.3 8250.6 - 8640.3 1991 8619.3 8552.5 - - - - - - - 8272.9 8466.4 8650.5 1992 - 8534.8 - - - - - - - 8181.8 8390.0 8473.3 1993 8656.5 8390.0 - - - - - - - 8120.0 8332.6 8446.7 1994 8510.8 8374.0 8220.7 8303.8 - - - - - - 8381.2 8419.2 1995 8446.1 8444.7 - - - - - - - 8221.8 8279.6 8403.7 1996 8475.4 8469.3 - - - - - - 8192.2 8089.6 8401.2 8510.0 1997 8516.3 8449.3 - - - - - - - 8240.0 8537.9 8484.2 1998 8471.5 8485.6 - - - - - - - 8345.6 8340.8 8430.0 1999 8489.0 8481.6 - - - - - - - 8121.7 8263.7 8403.7 2000 8397.9 8406.3 - - - - - - - 8196.7 8384.2 8549.6 2001 8555.1 8473.7 - - - - - 8146.9 - 8163.7 8281.8 8456.8 2002 8552.2 8391.2 - - - - - 8071.8 - 8324.6 8392.1 8432.0 2003 8624.5 8482.8 - - - - - - 8122.8 8143.2 8365.6 8607.1 2004 8564.5 8619.8 - - - - - 8119.0 - 8206.8 8355.0 8568.6 2005 8580.4 8430.5 - - - - - - - 8205.1 8347.5 8665.7 2006 8551.9 8462.8 - - - - - - - 8216.1 8373.5 8438.6 2007 8614.0 8468.4 - - - - - - - 8228.3 8328.4 8400.8 2008 8521.9 8324.5 - - - - - - 8116.4 8183.4 8314.3 8476.2 2009 8481.3 8508.7 - - - - - - - 8145.5 8384.1 8436.0 2010 8668.9 8538.5 - - - - - 8032.9 8252.9 8195.4 8279.5 8538.9 2011 8524.5 8442.7 - - - - - 8120.7 - 8190.7 8431.4 8436.4 2012 8444.7 8462.1 - - - - - 8193.6 - 8197.1 8399.2 8570.7 2013 8599.0 8381.9 - - - - - - - 8229.3 8276.7 8504.8 2014 8646.0 - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - 8261.4 8274.6 8430.4 2018 8531.6 8398.6 - - - - - - - 8189.0 8311.2 8451.4 2019 8491.8 8472.9 - - - - - 8120.9 8038.9 8197.5 8472.8 8575.0 2020 8551.2 8511.1 - - - - - - - 8131.5 8256.1 8421.9 2021 - 8378.4 8307.5 - - - - 8212.0 - 8237.5 8258.5 8366.7 2022 8430.7 8465.6 - - - - 8132.1 8090.0 - 8237.1 8271.5 8389.6 2023 8416.1 8388.6 - - - - - 8046.7 8151.0 8126.3 8290.0 8400.4 2024 8458.3 8414.3 8337.3 8130.0 - - - - - - - -