MPA 00Z 150hPa height 1987 - - - - - - - - - - - 13439.4 1988 13460.0 13668.1 13627.4 13385.0 13379.4 13188.6 13234.8 13097.1 13229.1 13201.7 13377.4 13454.7 1989 13554.5 13621.0 13576.4 13336.8 13315.0 13226.4 13354.1 13292.2 13197.9 13287.6 13475.0 13477.3 1990 - 13713.2 13547.6 13316.0 13297.5 13204.2 13259.4 13151.1 13184.7 13272.9 13271.1 13376.8 1991 13633.3 13586.7 13543.5 13400.4 13258.9 13155.4 13200.8 13210.0 13228.9 13193.8 13379.3 13440.6 1992 13627.9 13548.9 13575.4 13528.6 13215.0 13140.8 13226.0 13199.2 13192.9 13263.8 13477.5 13526.7 1993 13417.2 13653.6 13526.2 13373.5 13332.7 13282.2 13181.2 13226.3 13261.4 13351.7 13397.6 13435.5 1994 13564.5 13515.0 13548.3 13371.1 13175.6 13210.5 13156.0 13240.0 13137.4 13161.6 13395.7 13526.5 1995 13577.2 13577.8 - 13533.1 13326.1 13085.7 12932.3 13018.0 - 13361.2 13359.6 13539.6 1996 13509.2 13539.2 13530.0 13402.6 13335.9 13184.4 13261.9 13193.8 13294.4 13310.4 13335.2 13463.3 1997 13583.2 13522.0 13659.6 13409.2 13391.1 13227.9 13124.8 13113.3 - - - - 1998 13486.5 13617.3 13492.6 13510.6 13330.5 13260.0 13100.4 13088.2 13156.7 13247.6 13456.3 13438.5 1999 13550.0 13529.0 13530.0 13502.9 13300.9 13139.3 13107.5 13186.4 13134.8 13264.7 13474.0 13477.9 2000 13509.0 13585.4 13561.9 13414.1 13374.1 13203.8 13129.7 13100.0 13090.4 13177.4 13355.5 13333.9 2001 13517.3 13493.5 13482.7 13372.5 13302.7 13126.8 13099.3 13232.3 13280.4 13412.9 13436.7 13529.3 2002 13524.2 13641.1 13401.3 13428.0 13188.6 13113.6 13196.1 13240.0 13221.4 13232.4 13297.1 13507.1 2003 13448.6 13606.4 13539.7 13430.7 13347.9 13135.2 13181.7 13210.4 13166.8 13272.0 13282.4 13375.5 2004 13601.4 13671.8 13576.2 13370.0 13317.7 13220.3 13157.1 13212.2 13112.2 13338.1 13435.0 13428.4 2005 13497.7 13698.4 13484.3 13375.4 13246.3 13141.1 13216.1 13159.7 13295.0 13280.3 13359.0 13420.0 2006 13562.8 13620.4 13532.1 13415.8 13408.5 13232.3 13156.0 13114.8 13130.4 13397.0 13342.3 13438.8 2007 13528.3 13510.0 13451.7 13312.3 13300.0 - - - 13296.5 13262.1 13305.9 13536.3 2008 13564.5 13629.6 13610.4 13291.3 13298.8 13210.0 13185.3 13040.0 13321.9 13246.3 13348.8 13533.6 2009 13554.8 13540.8 13528.9 13352.0 13222.9 13224.1 13172.3 13102.1 13198.5 13279.6 13132.5 13402.3 2010 13503.0 13502.5 13536.7 13382.6 13338.6 13167.4 13177.3 13190.4 13220.0 13389.2 13487.4 13380.7 2011 13594.6 13688.8 13546.9 13339.2 13322.8 13191.2 13119.3 13136.4 13147.1 13291.3 13387.4 13593.7 2012 13602.3 13469.6 13510.4 13390.0 13271.1 13051.2 13025.9 13277.9 13226.2 13222.6 13383.2 13370.4 2013 13620.8 13555.0 13554.6 13572.1 13262.7 13203.1 13205.7 13046.4 13207.9 13280.0 13390.0 13365.9 2014 13452.1 13550.4 13493.8 13444.4 13298.0 13241.1 13202.3 13169.3 13225.0 13266.9 13301.1 13448.6 2015 13503.3 13577.3 13573.3 13417.2 13305.7 13112.2 13106.7 13171.2 13050.0 13336.8 13342.9 13395.0 2016 13511.2 13568.1 13600.7 13354.0 13377.0 13350.4 13173.2 13183.3 13355.4 13372.5 13315.6 13440.0 2017 13490.4 13653.1 13563.0 13432.5 13367.5 13087.4 13159.6 13164.7 13238.6 13236.9 13410.0 13428.1 2018 13549.3 13622.1 13496.3 13367.3 13263.2 13165.7 13198.6 13195.4 13167.1 13213.3 13400.3 13517.0 2019 13480.7 13508.5 13570.3 13400.0 13274.2 13230.0 13153.6 13131.3 13120.3 13310.7 13321.7 13431.8 2020 13541.5 13636.1 13639.1 13466.7 13331.7 13221.1 13052.0 13068.0 13202.9 13332.7 - 13469.0 2021 - 13667.5 13600.0 13538.9 13351.0 13276.0 - 13108.0 13265.7 13236.9 13423.3 13642.3 2022 13606.9 - - 13322.5 13316.1 13182.5 13086.5 13201.5 13311.2 13375.7 13483.8 13536.5 2023 13652.0 13565.0 13469.1 13377.3 13296.1 13193.3 13090.5 13060.6 13142.2 13207.1 13427.4 13484.1 2024 13567.1 13683.1 13415.0 13391.4 - - - - - - - -