MPA 00Z 200hPa height 1987 - - - - - - - - - - - 11569.4 1988 11564.5 11804.6 11788.8 11538.3 11552.5 11371.0 11448.9 11282.0 11424.5 11386.7 11513.2 11563.3 1989 11667.6 11748.1 11726.8 11468.4 11468.8 11398.4 11544.5 11471.3 11398.3 11508.8 11610.0 11610.4 1990 - 11846.8 11672.9 11425.2 11473.1 11377.9 11470.0 11318.9 11386.5 11440.4 11431.1 11522.7 1991 11782.5 11724.7 11670.0 11558.8 11424.3 11342.4 11402.8 11418.3 11441.1 11402.7 11519.3 11547.6 1992 11768.9 11664.0 11716.9 11692.9 11375.8 11325.0 11424.0 11396.2 11397.9 11431.2 11595.5 11658.3 1993 11523.9 11791.6 11674.6 11530.8 11482.7 11460.0 11354.7 11418.1 11440.4 11541.3 11564.4 11553.4 1994 11705.5 11630.0 11697.2 11526.5 11352.5 11386.8 11350.8 11426.2 11337.9 11360.4 11568.3 11629.4 1995 11702.0 11704.8 - 11704.6 11475.7 11245.7 11132.7 11208.6 - 11544.7 11537.4 11676.4 1996 11630.4 11675.2 11677.1 11559.3 11529.6 11374.8 11460.5 11392.4 11475.4 11470.8 11494.2 11634.4 1997 11710.8 11636.4 11798.1 11548.1 11565.2 11410.0 11308.5 11312.2 - - - - 1998 11606.5 11774.5 11657.9 11708.8 11540.0 11467.1 11301.1 11292.9 11351.2 11441.0 11598.7 11583.3 1999 11698.1 11657.1 11686.5 11681.7 11463.5 11338.9 11343.3 11397.3 11340.0 11475.3 11656.4 11621.7 2000 11656.2 11737.7 11705.9 11585.6 11561.5 11408.5 11337.6 11307.0 11314.4 11394.8 11477.7 11451.9 2001 11640.8 11619.6 11624.7 11527.1 11483.7 11330.7 11284.5 11447.0 11473.9 11618.9 11581.5 11680.4 2002 11688.3 11787.8 11527.3 11577.8 11360.0 11301.2 11381.7 11445.0 11411.4 11380.0 11445.7 11655.5 2003 11572.8 11738.6 11683.7 11601.3 11524.1 11300.3 11387.1 11427.7 11390.8 11446.3 11423.8 11512.3 2004 11751.0 11848.9 11728.5 11504.8 11509.3 11390.7 11350.3 11424.8 11313.3 11496.8 11600.4 11583.2 2005 11614.8 11856.0 11630.0 11541.1 11399.7 11328.9 11415.8 11362.1 11515.0 11453.3 11493.4 11564.2 2006 11693.4 11777.1 11675.5 11586.2 11597.7 11396.2 11340.3 11327.0 11335.0 11551.0 11493.0 11580.0 2007 11660.6 11640.0 11601.5 11462.3 11480.9 - - - 11528.1 11439.0 11436.9 11660.3 2008 11696.6 11775.7 11757.8 11435.2 11471.8 11392.8 11363.3 11245.0 11527.7 11451.1 11489.2 11690.7 2009 11695.6 11668.8 11666.7 11496.4 11386.8 11419.6 11354.5 11303.6 11408.1 11430.0 11315.4 11554.0 2010 11617.4 11622.5 11694.4 11551.1 11515.0 11362.6 11372.7 11382.8 11411.0 11570.8 11627.0 11518.6 2011 11732.1 11835.2 11697.6 11492.4 11510.4 11374.6 11331.0 11333.9 11369.3 11496.7 11578.9 11749.7 2012 11754.0 11598.6 11665.4 11532.9 11442.9 11233.5 11220.7 11502.4 11436.9 11393.8 11538.6 11490.4 2013 11754.8 11683.1 11709.6 11739.6 11424.2 11354.1 11381.1 11254.6 11430.7 11482.2 11515.6 11508.2 2014 11569.3 11684.1 11622.1 11603.3 11475.0 11432.5 11406.2 11373.3 11416.8 11455.2 11481.8 11567.3 2015 11637.7 11713.3 11713.7 11573.1 11492.7 11292.6 11292.3 11358.8 11272.4 11514.5 11532.1 11541.4 2016 11661.2 11704.8 11773.8 11525.0 11596.3 11556.1 11371.1 11361.7 11570.0 11547.9 11497.8 11560.4 2017 11613.1 11800.0 11720.7 11596.4 11565.7 11267.4 11355.8 11360.7 11431.1 11406.3 11548.6 11562.1 2018 11690.3 11782.9 11638.7 11505.5 11448.9 11350.0 11399.3 11399.3 11388.6 11413.0 11550.0 11679.0 2019 11599.7 11641.1 11722.8 11548.4 11444.6 11412.8 11359.0 11335.3 11336.2 11480.7 11486.0 11560.7 2020 11649.6 11756.4 11788.2 11648.3 11518.3 11378.9 11269.0 11281.0 11377.9 11520.0 - 11609.0 2021 - 11827.5 11747.5 11720.0 11544.0 11490.0 - 11342.7 11492.9 11439.4 11599.3 11789.2 2022 11730.0 - - 11486.7 11497.8 11397.5 11286.5 11395.0 11518.2 11562.9 11668.5 11678.8 2023 11812.0 11709.2 11604.5 11546.7 11467.2 11379.4 11315.5 11284.1 11354.4 11411.7 11546.3 11642.8 2024 11727.1 11837.5 11578.8 11550.5 - - - - - - - -