Halley 12Z 30hPa height 1957 - - - - - - - - - - 23765.0 24372.0 1958 24280.7 24038.9 23421.3 22784.0 - - 21175.7 21002.1 21127.3 21929.4 23186.7 24045.9 1959 24150.0 24073.8 23611.4 22725.6 22108.0 21695.3 21180.0 21120.5 21254.7 21948.8 22481.2 23855.5 1960 24070.7 23965.0 - - - 21589.1 - - 21283.0 21889.0 23050.0 24058.1 1961 - - - - - - - - - - - - 1962 - - - - - - - - - - - - 1963 - - - - - - - - - - - - 1964 - - - - - - - - - - - - 1965 - - - - - - - - - - - - 1966 - - - - - - - - - - 23373.6 - 1967 24285.3 24081.8 23491.1 22642.0 22029.2 21535.3 21226.9 21100.0 21268.6 22065.4 23272.2 24156.0 1968 24187.5 24075.3 23640.9 22872.7 22036.0 - - 21092.1 - 22231.8 - 24259.0 1969 24330.0 - - 22718.0 22090.0 - - - 21342.0 - - - 1970 - 23943.6 23492.3 - - - - - 21379.1 21961.8 23520.8 - 1971 - - 23589.4 23063.8 22158.9 21827.3 21204.5 21210.0 21345.2 22005.6 23495.0 24192.9 1972 24242.9 24050.0 23544.7 22831.1 22154.3 21584.5 21364.7 21344.3 21363.5 21953.2 23665.0 - 1973 - 23943.3 23448.8 22615.7 21891.7 21521.8 21279.2 21100.6 21357.7 21975.0 - - 1974 - - - 22688.0 - - 21125.5 - 21356.7 - - - 1975 - - - - 22025.8 - - - - - - - 1976 24245.3 23976.4 23431.0 22946.0 22093.0 21643.6 21269.3 21044.0 21338.2 22005.5 23257.1 24287.6 1977 - 23948.0 - 22836.7 - - 21265.0 - 21247.9 22019.4 23566.7 24120.7 1978 24250.0 24005.0 - - 22310.9 - - - 21414.4 - 23570.0 24093.3 1979 24240.7 23999.2 - - 22107.1 - - - 21373.0 22180.0 23050.0 - 1980 24237.6 24136.2 23548.5 22967.1 22278.8 - - 21317.0 21448.2 21863.3 22885.0 - 1981 - 23958.9 23544.0 22755.8 22236.7 - - - - - - - 1982 - - 23345.0 22676.7 22227.0 - - - 21386.7 22039.2 23175.0 23980.8 1983 24243.1 23972.3 23500.6 22887.3 - - - - 21427.1 21787.4 23206.7 24163.3 1984 - 23927.6 23485.1 22826.7 - - - - 21474.2 21861.0 23102.1 24174.2 1985 24247.9 23989.3 23542.3 22996.1 22295.7 21755.0 21246.1 21311.1 21481.9 21888.2 22702.7 24102.9 1986 24182.6 24075.6 23553.7 22867.8 22151.5 21670.5 21413.0 21284.0 21258.8 22069.6 23120.8 23923.1 1987 24180.4 24121.0 23495.0 22836.5 22353.2 21677.7 21327.9 21145.3 21250.8 21610.0 22294.2 23908.1 1988 24246.9 23984.4 23491.3 22847.9 22276.2 21652.9 21197.7 21280.5 21596.1 22199.6 23139.4 24220.0 1989 24210.0 23922.3 23514.3 22761.6 22117.5 21639.0 21356.0 21342.1 21397.4 21680.3 22955.2 23920.4 1990 24193.7 23977.2 23543.4 22880.4 22169.1 21552.7 21338.6 21154.1 21307.3 21866.3 22641.9 23551.4 1991 24112.9 23968.5 23410.3 22861.4 22044.3 21628.4 21378.9 21182.5 21443.9 21872.8 23362.5 24254.0 1992 - 23959.2 23365.2 22873.0 22185.7 21643.2 21363.7 21096.1 21308.2 22060.1 23039.5 23951.9 1993 24182.1 23977.5 23454.9 22741.3 22118.5 21527.2 - - 21293.6 21598.3 22616.4 23910.4 1994 - 23823.3 23417.7 22818.7 - - - - 21278.8 21572.3 22897.5 24232.0 1995 24162.1 23936.1 23462.9 22736.4 - - - - - 21723.9 22419.6 23767.0 1996 24120.3 23957.2 23377.0 22732.3 - - - - 21379.4 21708.3 22398.4 23609.1 1997 24225.7 23971.1 - 22788.3 - - - - - 21549.3 - 24040.2 1998 24152.4 - - - - - - - 21255.0 21622.8 22480.8 - 1999 - - 23522.9 22906.1 - - - - 21433.6 - 22488.9 23518.9 2000 23960.5 23861.7 23456.1 22788.5 22141.5 21580.0 21313.2 21098.1 21321.1 21719.9 23403.2 24061.8 2001 24072.1 23870.4 23381.8 22706.9 22109.9 21471.2 21266.1 21065.1 21296.0 21481.1 22564.6 23551.6 2002 24046.9 23855.1 23402.1 22937.6 22128.0 21604.9 21390.4 21150.6 21815.9 22400.6 23566.3 24031.2 2003 24082.1 23921.5 23442.9 22767.6 22082.5 21513.4 21165.6 21066.3 21221.9 21906.2 23139.6 23994.3 2004 24081.3 23886.9 23403.9 22868.7 21987.6 21556.5 21233.6 21067.5 21369.8 22154.0 22938.8 23794.9 2005 24175.8 23863.2 23467.6 22763.8 22020.5 21482.2 21223.1 21119.8 21285.0 21795.2 23139.5 24009.6 2006 24146.7 23847.7 23537.9 22820.8 22052.1 21759.5 21338.9 21182.9 21169.9 21559.6 22374.5 23693.1 2007 24122.6 23878.9 23466.2 22784.4 22263.5 - - 21146.0 21212.6 21838.5 22735.2 23665.8 2008 24028.3 23821.6 23470.2 22872.1 22140.4 21746.1 - - 21319.3 21644.7 22446.4 23381.8 2009 23969.5 23829.8 23470.3 22705.0 22212.3 - - - 21316.0 21773.8 22630.8 23843.5 2010 24143.0 23942.8 23376.0 22678.8 22028.4 - - - 21412.8 21807.5 22604.3 23512.7 2011 24059.3 23908.6 23503.7 22784.5 22182.0 21702.4 - - 21240.1 21606.4 22405.0 23594.6 2012 23967.8 23877.6 23421.5 22888.6 22339.2 - - - 21350.6 21956.3 23457.6 24146.1 2013 24139.7 23867.5 23451.5 22780.6 22090.5 - - - 21410.2 21952.6 23567.0 24072.0 2014 24073.2 23859.6 23385.1 22878.5 22215.2 - - - - 21745.0 22576.3 23886.6 2015 24051.7 23860.2 23387.9 22760.8 22182.3 - - - 21122.7 21592.2 22301.6 23544.8 2016 24037.8 23867.5 23386.4 22684.0 22025.7 21728.6 - - 21266.0 21820.4 23121.8 24165.2 2017 24142.9 24007.7 - - - - - - - - - 23990.9 2018 24066.9 23859.2 - - - - - - - - - 24018.0 2019 24039.6 23940.0 - - - - - - - - - 24112.1 2020 24121.4 - - - - - - - - - - - 2021 - - - - - - - - - - - 23439.1 2022 24034.3 - - - - - - - - - - 23591.9 2023 23947.3 - - - - - - - - - - 23717.7 2024 23991.1 - - - - - - - - - - -