MPA 12Z 150hPa height 1987 - - - - - - - - - - - 13443.5 1988 13451.8 13655.4 13594.3 13387.0 13363.5 13155.2 13195.4 13029.5 13246.7 13197.8 13373.8 13469.0 1989 13534.5 13615.2 13550.4 13322.2 13326.9 13211.1 13341.7 13277.9 13209.2 13295.0 13461.5 13453.7 1990 - 13698.1 13524.8 13297.0 13274.8 13198.7 13236.5 13122.7 13202.4 13254.8 13269.0 13364.6 1991 13616.7 13574.7 13530.4 13393.8 13218.5 13142.6 13162.1 13191.4 13200.5 13193.2 13343.6 13420.5 1992 13607.8 13526.8 13566.2 13505.8 13189.6 13113.1 13237.1 13200.4 13176.2 13256.3 13491.7 13532.3 1993 13406.8 13640.0 13506.1 13360.4 13320.0 13274.2 13170.0 13195.0 13234.8 13334.2 13385.6 13423.7 1994 13545.4 13492.6 13536.4 13320.5 13160.6 13183.2 13161.2 13211.9 13118.6 13116.5 13378.6 13521.6 1995 13591.9 13571.7 - 13521.9 13301.7 13075.9 12929.1 12970.5 - 13313.6 13367.6 13556.9 1996 13494.8 13518.8 13480.7 13376.4 13325.7 13174.0 13272.8 13190.0 13285.2 13305.2 13312.0 13462.9 1997 13560.4 13509.6 13641.2 13374.1 13372.2 13201.4 13087.3 13131.2 - - - - 1998 13501.6 13574.2 13487.7 13544.2 13328.6 13241.2 13098.9 13081.3 13160.0 13266.8 13439.6 13432.5 1999 13551.7 13525.4 13520.8 13505.0 13308.6 13141.2 13113.5 13177.5 13105.8 13271.0 13462.7 13475.9 2000 13484.8 13576.8 13541.2 13411.4 13360.0 13198.1 13102.1 13091.8 13066.2 13186.5 13357.6 13317.7 2001 13501.5 13473.9 13478.9 13373.6 13305.5 13124.3 13103.9 13227.9 13266.9 13388.6 13430.4 13519.3 2002 13504.4 13612.3 13405.0 13387.3 13184.0 13090.8 13203.2 13240.0 13228.5 13238.3 13288.3 13482.9 2003 13430.8 13585.8 13521.2 13429.6 13338.3 13123.8 13196.8 13202.7 13171.4 13257.5 13259.3 13374.0 2004 13580.4 13679.2 13553.6 13349.6 13331.9 13204.5 13164.7 13209.3 13098.1 13322.0 13442.0 13433.4 2005 13490.3 13680.4 13466.1 13363.0 13223.7 13094.1 13215.5 13169.0 13293.9 13276.5 13358.6 13400.7 2006 13547.9 13609.2 13518.9 13435.0 13406.6 13235.6 13136.2 13111.0 13141.5 13323.3 13343.7 13417.9 2007 13528.9 13488.1 13428.3 13293.6 13256.5 13080.4 13092.7 13150.4 13297.1 13237.0 13296.6 13519.3 2008 13539.2 13594.2 13606.7 13273.2 13255.0 13221.8 13192.3 13043.9 13320.0 13212.9 13364.8 13508.1 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - 13661.0 - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -