MPA 00Z 50hPa height 1987 - - - - - - - - - - - 20511.7 1988 20689.5 20745.0 20655.5 20419.5 20328.1 20051.0 19976.3 19949.1 20111.8 20081.7 20436.3 20675.6 1989 20735.5 20727.5 20621.8 20388.1 20292.0 20118.3 20237.9 20124.5 20044.2 20020.8 20652.9 20604.0 1990 - 20770.9 20649.5 20410.0 20238.5 20065.3 20081.1 20064.2 19972.0 20295.8 20245.3 20418.6 1991 20720.0 20708.0 20622.4 20415.4 20201.1 20001.2 20065.4 19973.6 19993.3 19924.2 20524.0 20660.0 1992 20770.0 20700.5 20622.3 20530.5 20210.0 19970.4 20082.9 20005.7 20037.1 20317.3 20671.9 20603.3 1993 20620.6 20721.2 20573.3 20380.0 20337.3 20205.0 20102.9 20045.2 20198.9 20164.8 20386.4 20601.0 1994 20664.8 20668.3 20582.4 20356.8 19974.3 20111.9 19976.2 20067.3 19986.5 20131.5 20282.5 20717.2 1995 20749.2 20710.9 - 20500.8 20300.8 20015.4 19697.5 19833.0 - 20322.9 20289.1 20657.2 1996 20669.2 20662.6 20565.8 20400.7 20240.0 20061.7 20135.5 20003.6 20137.4 20346.4 20344.8 20444.4 1997 20704.6 20680.0 20661.2 20433.1 20304.1 20075.0 19939.6 19914.7 - - - - 1998 20623.2 20665.2 20544.8 20436.7 20171.0 20068.2 19885.7 19868.5 19920.4 20125.2 20533.4 20514.0 1999 20620.0 20616.7 20526.0 20415.5 20272.6 19974.8 19891.8 19985.7 19946.9 20128.9 20450.0 20559.0 2000 20585.0 20628.9 20561.1 20348.9 20263.3 20018.5 19884.4 19936.7 19846.5 19928.8 20553.8 20492.3 2001 20635.0 20614.3 20514.3 20366.8 20197.0 19900.0 19975.8 19940.7 20161.6 20296.2 20582.3 20589.3 2002 20576.1 20691.2 20484.8 20419.2 20105.2 19966.8 20086.9 19983.5 20180.0 20307.5 20326.3 20583.3 2003 20612.1 20676.4 20564.0 20400.3 20295.9 20065.0 19992.0 19955.2 19950.6 20300.0 20427.9 20504.0 2004 20658.5 20667.8 20593.5 20395.6 20216.4 20106.2 19960.8 19956.5 19833.6 20334.2 20452.2 20480.4 2005 20644.7 20702.2 20512.6 20333.9 20146.1 19946.9 20038.6 19979.2 20043.8 20251.9 20438.9 20558.3 2006 20666.8 20658.4 20571.9 20397.5 20272.9 20135.8 19983.2 19854.4 19985.5 20449.4 20433.8 20556.7 2007 20633.1 20607.2 20471.5 20285.5 20265.0 - - - 20033.5 20173.8 20445.9 20655.0 2008 20644.0 20646.2 20578.1 20286.0 20197.8 20175.8 20013.0 19800.0 20094.4 20078.6 20463.2 20571.1 2009 20605.9 20596.5 20550.4 20350.0 20155.8 20104.1 20053.4 19902.6 20030.8 20375.8 20047.6 20459.0 2010 20647.7 20628.8 20558.9 20358.3 20250.7 19991.8 20011.6 20031.9 20028.5 20300.8 20543.5 20486.7 2011 20635.7 20704.6 20564.5 20330.0 20187.3 20054.4 19805.7 19974.8 19892.4 20116.5 20277.0 20644.0 2012 20634.6 20563.1 20510.7 20370.4 20143.1 19860.4 19823.6 20007.0 19945.9 20123.3 20427.8 20531.4 2013 20710.0 20659.6 20586.3 20523.2 20197.6 20166.9 20079.6 19799.6 19949.7 20125.2 20525.0 20482.7 2014 20610.0 20632.8 20529.6 20403.8 20207.6 20099.6 19960.4 19915.6 20033.5 20155.4 20251.9 20587.3 2015 20604.8 20658.8 20592.7 20390.8 20180.9 20001.8 19927.1 19968.0 19777.9 20270.4 20272.1 20514.5 2016 20620.0 20656.9 20580.0 20340.3 20183.3 20240.8 19996.1 20097.4 20084.2 20240.4 20175.6 20591.8 2017 20637.4 20693.8 20573.4 20395.2 20239.0 19908.5 19997.8 19892.0 20070.4 20134.0 20535.8 20541.5 2018 20613.1 20659.2 20542.3 20378.0 20132.6 20012.8 19990.4 19961.4 19898.1 20005.0 20452.7 20561.3 2019 20621.1 20617.4 20579.0 20381.2 20211.5 20101.9 19938.6 19829.6 19806.1 20290.7 20253.7 20572.6 2020 20693.6 20748.2 20665.3 20397.4 20207.0 20073.6 19792.3 19758.9 20095.6 20285.3 20542.9 20495.3 2021 20602.9 20669.3 20573.1 20423.1 20246.9 20065.0 19841.2 19781.1 19976.4 20022.9 20420.0 20637.5 2022 20637.9 20656.7 - 20348.0 20227.2 19934.5 19837.2 20023.3 20130.6 20302.5 20412.1 20544.5 2023 20652.4 20627.8 20502.5 20321.3 20246.5 20067.3 19805.7 19812.2 19905.5 20162.9 20645.0 20535.0 2024 20687.7 20675.5 20466.4 20395.2 - - - - - - - -