Syowa 00Z 300hPa height 1968 - - 8476.7 8353.2 8396.1 8305.8 8092.6 8158.4 8036.5 8291.9 8423.8 8541.6 1969 8663.1 8576.4 8397.3 8417.5 8284.9 8438.6 8103.3 8076.4 8101.1 8350.3 8444.0 8582.9 1970 8527.8 8484.0 8465.2 8344.4 8277.5 8266.3 8177.9 8068.1 8171.7 8264.2 8451.8 8574.3 1971 8654.9 8559.9 8425.2 8335.4 8384.4 8135.7 8166.6 8159.2 8222.5 8198.3 8351.4 8661.6 1972 8632.0 8510.2 8413.7 8450.3 8316.6 8369.6 8125.4 8293.2 8206.9 8213.2 8331.6 8554.9 1973 8596.4 8504.7 8382.2 8347.8 8383.6 8337.9 8140.5 8077.0 8185.0 8219.6 8360.6 8465.8 1974 8620.5 8449.4 8420.3 8360.7 8365.9 8338.2 8209.1 8297.5 8165.7 8213.2 8459.8 8615.7 1975 8651.5 8541.6 8500.4 8288.3 8482.7 8277.8 8296.5 8172.4 8166.6 8200.0 8391.0 8579.4 1976 8673.4 8483.1 8398.4 8278.5 8172.1 8310.1 8142.4 8157.1 8107.8 8133.8 8472.3 8746.2 1977 8637.6 8526.5 8413.9 8381.1 8414.8 8379.7 8357.4 8326.1 8132.4 8217.6 8330.5 8514.0 1978 8469.6 8524.4 8430.5 8324.1 8322.7 8236.6 8268.7 8043.2 8175.7 8288.2 8407.8 8524.7 1979 8583.8 8495.8 8414.4 8420.5 8311.1 8174.3 8097.4 8076.7 8132.8 8300.2 8453.0 8633.1 1980 8577.1 8533.2 8520.5 8419.6 8371.5 8219.4 8352.4 8256.9 8287.8 8178.2 8466.4 8516.0 1981 8582.3 8579.4 8456.2 8354.3 8335.1 8241.1 8391.8 8327.9 8239.4 8196.5 8340.8 8502.9 1982 8602.1 8520.3 8348.8 8327.4 8312.6 8205.5 8177.9 8210.9 8153.7 8270.4 8523.4 8682.1 1983 8593.2 8533.9 8422.9 8397.3 8392.2 8268.9 8164.6 8121.7 8239.2 8231.9 8328.5 8465.0 1984 8584.1 8539.8 8443.5 8345.2 8453.1 8246.7 8239.6 8233.3 8174.2 8194.4 8395.4 8674.6 1985 8627.9 8536.5 8496.5 8421.2 8277.7 8329.9 8151.2 8145.2 8178.4 8198.9 8308.9 8447.5 1986 8604.5 8641.2 8511.8 8343.7 8361.2 8313.0 8187.7 8273.8 8131.0 8219.4 8400.2 8452.1 1987 8629.0 8552.6 8460.7 8384.5 8372.8 8297.6 8282.3 8132.5 8159.9 8239.9 8390.5 8533.1 1988 8662.4 8535.0 8560.2 8353.3 8362.5 8452.2 8141.9 8172.5 8298.0 8393.5 8360.1 8522.6 1989 8628.6 8546.9 8447.1 8363.9 8172.5 8225.8 8137.5 8179.4 8200.7 8231.1 8412.8 8548.4 1990 8589.6 8496.2 8449.1 8442.2 8439.3 8276.1 8393.4 8125.2 8029.2 8339.9 8424.8 8503.2 1991 8505.2 8622.4 8423.7 8316.8 8307.7 8378.4 8258.0 8210.0 8204.5 8226.9 8362.2 8710.5 1992 8656.0 8540.0 8489.1 8389.1 8453.7 8403.5 8234.3 8093.8 8108.9 8255.2 8286.7 8511.3 1993 8656.6 8490.7 8374.0 8348.6 8323.6 8276.2 8183.3 8161.8 8229.9 8284.4 8358.6 8474.6 1994 8505.4 8495.2 8402.7 8410.9 8302.1 8418.3 8267.0 8203.5 8198.3 8263.3 8416.5 8480.4 1995 8527.5 8556.3 8473.2 8372.4 8256.8 8256.9 8349.1 8235.6 8047.4 8304.2 8386.5 8531.9 1996 8557.0 8608.7 8392.6 8385.4 8263.9 8304.9 8366.9 8311.5 8433.9 8263.7 8460.8 8545.3 1997 8584.5 8547.4 8374.0 8371.7 8292.0 8371.0 8205.4 8191.1 8199.6 8250.1 8556.5 8556.9 1998 8536.9 8473.4 8416.7 8257.6 8362.1 8271.5 8223.3 8197.9 8190.2 8242.1 8322.6 8458.8 1999 8572.3 8576.7 8411.7 8261.3 8258.0 8391.8 8165.9 8282.5 8289.9 8195.2 8367.4 8406.7 2000 8461.5 8486.4 8347.9 8389.9 8231.9 8358.7 8236.9 8262.4 8329.3 8228.3 8441.5 8556.6 2001 8570.5 8572.7 8428.3 8348.6 8389.2 8387.8 8349.2 8133.6 8141.0 8258.8 8332.9 8443.6 2002 8551.6 8458.3 8522.1 8468.5 8499.9 8349.2 8335.1 8208.6 8217.5 8443.7 8364.6 8512.5 2003 8597.8 8560.2 8464.7 8339.7 8353.1 8281.7 8203.0 8173.2 8170.5 8260.9 8459.0 8636.0 2004 8565.3 8611.4 8407.3 8332.0 8281.6 8227.5 8071.7 8099.8 8122.2 8269.5 8343.8 8556.9 2005 8562.8 8477.2 8487.2 8346.7 8293.7 8341.0 8270.2 8226.3 8139.6 8219.4 8327.0 8666.3 2006 8555.9 8509.7 8410.8 8357.7 8290.7 8307.6 8119.9 8424.2 8225.9 8201.0 8417.1 8468.4 2007 8580.5 8492.1 8448.6 8427.9 8388.0 8417.2 8391.9 8246.5 8256.0 8313.5 8533.2 8434.1 2008 8495.9 8430.3 8480.0 8484.1 8376.3 8245.8 8272.1 8134.2 8200.2 8202.7 8342.1 8452.4 2009 8556.1 8490.8 8476.8 8344.8 8512.1 8464.8 8322.7 8214.7 8226.3 8312.3 8490.0 8530.0 2010 8663.3 8630.4 8463.0 8344.8 8289.6 8127.3 8146.1 8100.0 8220.7 8197.1 8329.3 8575.5 2011 8620.3 8553.3 8479.3 8462.2 8327.7 8415.6 8291.0 8337.1 8269.3 8312.7 8463.8 8482.8 2012 8483.9 8592.7 8408.4 8348.7 8346.1 8209.0 8198.7 8229.3 8193.3 8334.6 8579.3 8606.3 2013 8624.3 8529.2 8386.3 8312.1 8272.7 8382.7 8199.3 8317.1 8296.3 8255.7 8527.0 8542.8 2014 8593.0 8527.4 8426.6 8271.5 8375.4 8289.6 8194.3 8269.3 8246.1 8272.6 8401.7 8473.3 2015 8567.6 8479.5 8406.3 8263.2 8337.0 8270.9 8137.6 8107.2 8196.7 8353.1 8509.5 8487.4 2016 8529.4 8527.9 8474.4 8415.0 8349.2 8194.1 8160.8 8348.4 8192.8 8356.8 8492.6 8598.2 2017 8646.4 - 8450.6 8347.3 8327.5 8199.1 8235.7 8147.5 8167.1 - - - 2018 - 8520.0 8487.9 8417.5 8427.5 8431.7 8145.0 8251.1 8160.0 8283.6 - 8527.3 2019 8583.6 - - 8380.0 - 8245.8 8258.0 8114.0 8142.9 8457.0 - - 2020 - 8508.0 - 8468.0 8346.2 8286.5 8260.0 8230.0 8267.0 8185.8 8368.0 - 2021 - 8402.0 8650.8 8342.7 8251.3 8255.9 8230.0 8160.0 8217.7 8262.1 8453.3 8505.9 2022 8629.4 8527.1 8449.0 8451.5 8339.5 8392.0 - 8203.1 - 8292.4 8298.1 - 2023 - - 8520.8 8388.0 8301.9 8328.1 8242.0 8229.1 - 8383.6 8407.9 8541.7 2024 8576.9 8547.3 8404.6 8352.0 - - - - - - - -