Davis 12Z 200hPa height 1971 - - - - - - - - - 10789.0 11013.7 11328.1 1972 11352.3 11228.3 11130.0 - - - - - - - - 11250.6 1973 11295.2 11192.1 11045.7 - - - - - - 10821.7 10985.0 11006.0 1974 11237.6 11220.7 11038.1 - - - - - - 10838.7 11074.3 11291.0 1975 11351.0 11248.9 11170.6 - - - - - - - 10983.4 11222.9 1976 - 11223.0 11090.6 - - - - - - 10667.1 11090.0 11371.3 1977 11342.3 11224.3 11055.5 - - - - - - 10813.8 10948.3 11171.3 1978 11104.5 - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - 11081.9 10939.3 10702.1 10738.8 10660.0 10751.3 10728.3 10771.3 10966.7 11281.0 1990 11301.7 11237.1 11100.3 11094.1 10983.7 10764.5 10944.3 10606.7 10530.0 10830.6 10978.7 11178.1 1991 11176.0 11210.5 11126.3 10968.3 10867.7 10924.1 10893.4 10722.7 10696.0 10733.0 10959.9 11330.5 1992 11268.9 11269.5 11103.3 10976.3 10995.7 10934.1 10710.0 10597.5 10548.4 10737.5 10987.5 11064.5 1993 11307.5 11164.0 11033.3 10922.3 10734.0 10673.8 10651.8 10574.8 10628.4 10711.9 10890.0 11066.9 1994 11217.3 11114.1 10990.8 10974.2 10880.0 - 10771.0 10593.4 10663.6 10741.1 11079.2 11094.0 1995 11194.0 11215.0 11065.1 11039.5 10803.6 10747.5 10908.4 10667.6 10534.0 10754.4 10969.1 11077.8 1996 11231.7 11229.4 11071.3 10979.0 10736.5 10862.0 10732.7 10778.7 10888.0 10756.0 10991.2 11200.4 1997 11268.5 11214.4 11037.8 10976.6 10807.1 10809.6 10560.7 10651.9 10569.0 10747.2 11049.0 11232.8 1998 11200.9 11165.1 11052.8 10810.5 10779.6 10773.1 10711.6 10630.2 10717.7 10740.1 10877.5 11006.7 1999 11189.9 11184.1 11068.2 10809.6 10809.5 10897.9 10635.5 10616.2 10699.5 10638.6 10891.2 10922.4 2000 11154.3 11139.2 11012.3 11015.8 10771.1 10901.3 10700.7 10663.7 10761.6 10665.0 11014.2 11279.3 2001 11286.6 11284.3 11087.9 10861.0 10865.0 10769.6 10728.7 10588.7 10600.8 10701.4 10839.9 11094.1 2002 11207.5 11147.4 11144.4 10987.8 11042.8 10829.8 10760.3 10636.9 10741.5 11003.5 11010.3 11172.7 2003 11341.8 11258.1 11095.4 10894.5 10828.3 10852.6 10688.2 10632.4 10705.8 10694.4 10971.8 11239.0 2004 11288.8 11296.3 11045.9 10938.3 10868.9 10743.5 - 10547.3 10577.0 10809.8 10980.5 - 2005 - - - - - - - - - - 10950.0 11341.2 2006 11215.7 11152.6 - - - - - - - - 11047.2 11023.9 2007 11241.6 11137.5 11082.1 11052.7 10940.3 10895.1 10860.4 10725.8 10654.6 10776.3 10976.0 11085.5 2008 11144.3 11118.8 - - - - - - - - - 11174.3 2009 11233.3 11265.8 - - - - - - - - 11144.7 11131.2 2010 11327.2 11286.1 11083.5 10918.0 10811.0 10657.6 10526.8 10553.6 10716.6 10722.6 10904.1 11155.0 2011 11347.5 11180.0 11070.2 10989.6 10843.6 10868.8 10845.3 10670.6 10722.7 10734.1 11082.1 10986.1 2012 11142.7 11209.6 11055.3 10984.4 10822.5 10763.8 10603.5 10646.4 10634.9 10791.8 - 11292.4 2013 11324.7 - - - - - - - - - 11218.4 11246.4 2014 11259.2 11197.4 11090.5 10875.5 10979.5 10761.4 10664.2 10592.7 10752.5 10759.4 10986.3 11074.2 2015 11242.3 - 10975.0 10866.6 10816.3 10751.9 10620.3 10601.7 10592.7 10777.4 10981.2 11085.7 2016 11133.6 11164.3 - - - - - - - - 11112.4 11209.7 2017 11313.7 11221.8 11075.0 10855.4 10826.8 10718.9 10745.2 10608.7 10648.9 10782.6 10993.9 11204.1 2018 11287.1 11265.6 11121.3 11064.8 10797.9 10882.2 10713.8 10777.7 10571.9 10680.3 10856.7 11184.7 2019 11222.3 11279.6 11094.7 11005.7 10848.7 10773.4 10729.4 10661.7 10663.0 10983.9 11172.0 11298.4 2020 11352.3 11221.4 11040.0 11009.7 10897.9 10809.7 10781.3 10760.7 10701.9 10767.0 10988.7 11039.0 2021 11150.6 11130.0 11120.7 10938.3 10790.3 10707.9 10741.7 10668.7 10654.1 10771.9 10913.4 11034.8 2022 11215.5 11139.6 11074.8 10922.0 10860.0 10910.4 10676.7 10708.6 10581.9 10784.2 10829.3 10976.5 2023 11123.9 11188.5 11178.2 11019.1 10833.1 10829.5 10732.7 10661.2 10752.9 10742.0 10855.4 11123.0 2024 11190.6 11152.8 11036.8 10916.0 - - - - - - - -