Mawson 12Z 850hPa height 1955 - - - - - - - - - - - - 1956 - - - - - - - - - - - - 1957 - - - - - - - - - - - - 1958 - - - - - - - - - - - - 1959 - - - - - - - - - - - - 1960 - - - - - - - - - - - - 1961 - - - - - - - - - - - - 1962 - - - - - - - - - - - - 1963 - - - - - - - - - - - - 1964 - - - - - - - - - - - - 1965 - - - - - - - - - - - - 1966 - - - - - - - - - - - - 1967 - - - - - - - - - 1143.7 1196.2 1190.0 1968 1208.7 1204.1 1201.1 - - - - - - - - - 1969 - - - - - - - - - 1167.6 - - 1970 - - - - - - - - - - 1181.0 1225.5 1971 1249.4 1195.0 1158.3 - - - - - - 1123.7 1165.5 1219.7 1972 1234.5 1204.5 1208.3 - - - - - - 1118.1 1125.5 1227.7 1973 1238.0 1182.5 1109.0 - - - - - - 1113.6 1135.2 1143.1 1974 1202.3 1164.0 1137.7 1175.9 1172.6 1142.9 1135.8 1191.6 1078.7 1114.8 1181.7 1246.3 1975 1217.7 1195.6 1177.7 - - - - - - 1087.4 1126.6 1209.2 1976 - - - - - - - - - 1081.1 1198.0 1297.0 1977 1237.7 1189.3 1167.4 - - - - - - 1135.8 1138.6 1181.0 1978 1162.8 1205.9 - - - - - - - - - - 1979 - - 1128.4 1173.0 1106.8 1109.0 1061.1 1084.0 1066.7 1104.0 1170.0 1227.4 1980 1224.2 1203.8 1188.4 1186.7 1155.8 1112.5 1152.4 1152.3 1130.7 1095.7 1176.3 1204.5 1981 1200.3 1175.0 1201.3 1203.8 1155.0 1127.6 1198.7 1169.4 1114.3 1091.3 1133.4 1151.3 1982 1219.4 1169.6 1118.7 1111.3 1124.5 1124.5 1127.1 1097.1 1064.3 1138.7 1203.4 1262.9 1983 1220.3 1208.9 1164.3 1117.7 1168.4 1151.7 1108.3 1101.0 1100.3 1090.3 1120.7 1152.3 1984 1219.0 1192.1 1153.3 1136.0 1192.6 1142.7 1105.8 1142.9 1096.7 1078.1 1150.7 1246.5 1985 1251.7 1174.6 1147.1 1175.0 1151.0 1166.3 1062.3 1079.4 1088.7 1083.5 1091.0 1148.7 1986 1201.3 1229.3 1189.3 1123.3 1176.3 1154.6 1076.1 1115.3 1032.1 1057.1 1138.3 1157.7 1987 1244.8 1190.0 1159.0 1159.3 1142.3 1158.7 1135.2 1030.3 1109.3 1077.4 1113.0 1169.8 1988 1214.0 1161.4 1151.6 1118.5 1188.0 1215.8 1078.8 1074.2 1148.3 1190.1 1134.8 1169.4 1989 - - - - - - - - - - - - 1990 - - - - - - - - - - - - 1991 - - - - - 1154.8 1158.3 1108.8 1124.8 1075.6 1162.8 1261.1 1992 1211.1 1229.1 1188.4 1183.7 1229.2 1214.3 1081.8 1065.8 1077.5 1123.4 1108.6 1164.0 1993 1248.1 1139.9 1164.2 1144.4 1111.6 1112.5 1065.9 1061.8 1093.5 1088.0 1128.5 1159.8 1994 1179.4 1146.2 1116.1 1171.0 1168.3 1222.1 1158.2 1091.3 1110.2 1106.8 1190.7 1153.5 1995 1167.6 1177.9 1155.2 1154.2 1120.6 1138.6 1184.4 1130.9 1020.2 - - 1174.8 1996 1202.9 1207.7 1134.2 1144.3 1131.1 1149.1 1173.2 1127.4 1211.9 1109.5 1192.4 1200.2 1997 1201.2 1168.1 1094.1 1193.6 1120.3 1186.1 1063.2 1089.3 1094.5 1120.1 1203.5 1214.8 1998 1183.4 1161.8 1148.1 1049.8 1126.2 1110.8 1100.9 1051.6 1136.6 1118.1 1088.2 1137.8 1999 1186.5 1178.7 1157.3 1107.3 1103.7 1216.1 1110.8 1093.0 1118.2 1033.8 1129.5 1109.5 2000 1128.4 1145.8 1128.9 1149.8 1081.2 1150.4 1127.9 1111.5 1149.0 1082.3 1188.5 1236.3 2001 1177.4 1203.8 1158.2 1100.1 1154.2 1145.2 1149.3 1080.0 1079.7 1094.1 1107.5 1126.1 2002 1169.6 1122.7 1200.2 1148.8 1219.3 1151.8 1164.9 1086.1 1127.6 1191.4 1153.8 1141.8 2003 1227.4 1199.4 1155.7 1125.6 1151.1 1201.8 1135.4 1073.3 1098.4 1127.0 1157.5 1228.9 2004 1180.4 1225.2 1111.1 1121.6 1144.2 1101.7 1065.1 1068.1 1065.2 1128.5 1138.7 - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - 1183.2 1165.5 1127.6 1120.7 1090.9 1113.1 1061.2 1102.4 1150.7 2009 1186.9 1178.1 1142.0 1154.4 1175.3 1211.6 1134.6 1154.8 1128.2 1123.9 1182.1 1178.0 2010 1243.8 1223.4 1156.9 1145.0 1116.5 1060.2 1031.2 1040.7 1083.9 1103.9 1136.1 1198.5 2011 1225.2 1183.2 1165.2 1180.4 1113.8 1193.7 1166.2 1151.5 1130.4 1122.2 1194.6 1143.8 2012 1116.1 1176.9 1145.3 1118.4 1148.6 1134.3 1079.2 1117.9 1080.7 1099.9 1189.6 1217.3 2013 1164.0 1140.5 1117.7 1127.6 1123.5 1189.1 1111.8 1194.4 1164.0 1133.7 1179.5 1187.0 2014 1208.2 1167.8 1162.7 1137.4 1166.7 1153.6 1114.0 1097.2 1148.5 1114.1 1167.8 1123.1 2015 1177.3 1128.1 1114.2 1097.6 1120.9 1126.3 1098.5 1046.8 1082.3 1151.9 1127.4 1166.3 2016 1151.7 1151.0 1111.8 1104.8 1121.4 1095.9 1103.6 1155.9 - - 1211.3 1185.2 2017 1239.4 1170.2 1142.3 1109.5 1102.1 1125.3 1136.7 1050.2 1092.5 1134.0 1137.0 1151.0 2018 1193.3 1138.9 1185.2 1175.6 1145.8 1209.0 1094.8 1092.3 1067.1 - 1134.3 1170.1 2019 1172.8 1174.8 1158.9 1164.7 1178.3 1090.2 1153.8 1088.5 1076.3 1198.4 1208.5 1264.3 2020 1216.0 1174.5 1158.3 1162.5 1116.8 1168.6 1132.2 1127.9 1083.8 1108.0 1152.6 1117.8 2021 1156.8 1123.5 1169.7 1110.4 1104.8 1121.8 1123.5 1090.3 1071.5 1088.8 1132.0 1146.6 2022 1182.2 - 1159.7 1132.1 1140.1 1146.1 1139.5 1118.7 1060.1 1099.1 1085.0 1121.5 2023 1110.2 1154.1 1182.6 1161.7 1155.8 1170.4 1105.9 1177.3 1113.1 1116.9 1133.0 1137.0 2024 1164.6 1146.5 1120.2 1118.7 - - - - - - - -