Syowa 12Z 850hPa height 1959 - - - 1153.9 - - 1137.6 - - 1123.0 - - 1960 - - 1086.3 1130.1 1150.5 1127.6 1084.2 1108.9 1044.7 1117.6 1131.7 1146.4 1961 1199.8 1221.0 1146.3 1145.6 1155.3 1161.9 1086.6 1090.4 1162.6 1127.0 1148.5 1153.5 1962 - - - - - - - - - - - - 1963 - - - - - - - - - - - - 1964 - - - - - - - - - - - - 1965 - - - - - - - - - - - - 1966 - 1244.0 1192.4 1141.9 1182.4 1127.1 1155.3 1030.2 1091.5 1065.1 1161.6 1191.8 1967 1239.0 1229.6 1146.0 1128.0 1156.9 1144.6 1131.6 1105.6 1106.7 1142.3 1190.5 1191.3 1968 1205.2 1201.8 - - - - - - - - - - 1969 - - - - - - - - - - - - 1970 - - - - - - - - - - - - 1971 - - - - - - - - - - - - 1972 - - - - - - - - - - - - 1973 - - - - - - - - - - - - 1974 - - 1130.3 1162.0 1159.9 1146.4 1122.0 1189.7 1065.6 1104.9 1198.6 1239.8 1975 1232.0 1189.4 1167.2 1105.1 1223.6 1155.8 1165.5 1081.3 1063.5 1085.6 1133.2 1226.1 1976 1234.1 1174.8 1145.9 1089.4 1079.2 1164.4 1100.1 1080.7 1054.6 1087.7 1223.3 1315.9 1977 1248.6 1193.0 1158.4 1162.9 1170.3 1176.9 1163.4 1147.9 1050.0 1074.4 1131.6 1190.5 1978 1171.1 1174.3 1169.9 1124.5 1144.3 1133.6 1169.0 1032.2 1088.0 1134.6 1160.6 1202.7 1979 1185.9 1179.1 1123.0 1138.1 1093.9 1111.3 1030.7 1068.9 1060.1 1119.4 1156.6 1246.9 1980 1205.0 1196.7 1183.9 1175.1 1146.6 1098.8 1147.1 1141.4 1130.7 1081.6 1191.6 1195.3 1981 1205.9 1160.7 1184.2 1174.2 1129.0 1125.7 1215.4 1175.8 1109.4 1079.1 1132.4 1128.5 1982 1226.5 1166.3 1080.1 1088.9 1126.0 1088.3 1112.2 1098.4 1040.7 1128.0 1194.0 1263.9 1983 1218.4 1205.6 1149.5 1130.4 1163.3 1139.1 1079.7 1085.6 1074.3 1070.7 1113.1 1165.6 1984 1232.1 1185.2 1127.4 1138.1 1177.5 1151.4 1118.8 1136.0 1082.2 1085.9 1158.0 1259.4 1985 1230.0 1168.2 1153.7 1150.9 1140.4 1156.7 1034.0 1070.7 1074.3 1074.3 1090.4 1141.1 1986 1197.6 1236.0 1173.5 1094.5 1190.9 1173.7 1065.5 1124.4 1023.6 1075.6 1120.3 1146.9 1987 1243.4 1180.5 1150.4 1141.2 1165.6 1146.4 1152.0 1036.0 1111.7 1071.2 1093.1 1190.6 1988 1221.1 1154.7 1185.7 1145.2 1173.0 1241.2 1057.5 1093.5 1143.8 1198.3 1128.2 1176.3 1989 1218.3 1147.7 1156.3 1162.8 1053.0 1086.1 1062.3 1117.1 1120.5 1092.1 1157.7 1195.9 1990 1206.3 1147.5 1148.6 1193.8 1223.0 1168.9 1183.0 1075.2 1031.2 1123.6 1161.2 1176.3 1991 1149.7 1211.2 1124.4 1134.7 1120.5 1174.8 1143.0 1086.6 1118.3 1070.1 1156.8 1258.3 1992 1217.9 1205.2 1164.5 1139.6 1191.1 1203.6 1101.0 1056.1 1070.2 1116.6 1098.6 1172.9 1993 1252.6 1156.3 1130.0 1140.3 1103.1 1120.2 1067.7 1040.1 1077.4 1087.4 1129.8 1144.1 1994 1187.3 1144.4 1101.0 1140.6 1141.5 1218.7 1124.0 1077.5 1108.8 1097.1 1175.3 1135.1 1995 1163.9 1168.4 1138.9 1127.4 1092.2 1148.7 1190.5 1137.1 1013.3 1118.6 1163.6 1159.3 1996 1208.4 1194.9 1117.0 1124.8 1109.7 1133.8 1165.9 1147.5 1207.2 1089.1 1191.7 1199.9 1997 1202.8 1163.8 1097.9 1143.9 1099.1 1179.5 1089.3 1082.2 1107.9 1105.6 1232.4 1210.2 1998 1172.3 1144.4 1113.6 1039.4 1111.1 1102.0 1086.4 1081.4 1094.1 1095.4 1084.8 1148.7 1999 1182.2 1180.9 1133.5 1081.3 1087.7 1201.7 1092.9 1123.8 1130.8 1027.6 1131.5 1119.7 2000 1136.7 1132.4 1139.7 1133.3 1078.0 1140.6 1117.8 1119.6 1158.2 1083.3 1180.8 1235.1 2001 1188.5 1195.2 1152.4 1094.7 1157.5 1185.9 1146.5 1084.2 1067.0 1111.4 1106.9 1123.5 2002 1177.4 1104.9 1184.0 1154.9 1219.5 1148.8 1138.5 1076.7 1123.6 1192.2 1150.2 1139.3 2003 1227.1 1199.8 1142.9 1094.6 1146.1 1177.3 1107.0 1072.3 1073.1 1128.9 1147.6 1240.0 2004 1166.0 1214.2 1088.3 1128.7 1127.3 1081.2 1038.8 1063.2 1057.2 1110.6 1140.2 1205.7 2005 1202.7 1126.6 1143.2 1107.2 1121.5 1205.1 1121.9 1092.8 1076.2 1088.5 1147.1 1273.4 2006 1183.5 1173.5 1116.3 1132.1 1077.6 1124.8 1056.2 1216.9 1115.3 1072.0 1127.7 1168.7 2007 1197.2 1146.4 1160.7 1154.8 1158.7 1199.4 1219.2 1116.5 1138.7 1108.5 1177.8 1120.1 2008 1161.3 1119.8 1153.6 1161.6 1175.3 1112.8 1103.6 1083.9 1076.6 1068.9 1109.9 1132.8 2009 1172.1 1142.8 1130.6 1151.7 1204.9 1181.3 1140.7 1123.5 1123.6 1119.4 1171.3 1180.6 2010 1233.3 1218.8 1162.8 1131.9 1118.4 1052.6 1043.5 1033.4 1079.8 1080.0 1098.3 1214.3 2011 1192.4 1184.1 1157.4 1170.2 1111.8 1181.6 1150.4 1164.3 1125.0 1123.5 1188.0 1154.7 2012 1115.4 1189.5 1143.0 1111.1 1141.2 1127.3 1072.8 1093.7 1094.3 1093.9 1206.1 1208.3 2013 1176.3 1137.3 1094.8 1101.8 1125.0 1186.5 1104.1 1177.1 1148.3 1119.7 1168.9 1174.4 2014 1221.1 1149.3 1142.0 1107.9 1157.9 1138.1 1088.9 1127.8 1137.2 1122.0 1165.4 1117.0 2015 1184.3 1130.7 1107.2 1077.7 1119.0 1124.1 1051.9 1018.7 1080.7 1151.9 1133.3 1175.5 2016 1160.2 1140.5 1109.0 1114.8 1126.2 1066.7 1082.3 1134.5 1054.6 1106.0 1196.5 1209.2 2017 1238.8 1174.8 1156.8 1123.5 1103.9 1148.1 1082.6 1069.0 1033.4 1125.4 1120.9 1160.9 2018 1165.4 1139.0 1157.2 1176.2 1182.0 1175.0 1100.4 1104.9 1057.4 1113.6 1095.0 1171.2 2019 1168.7 1175.0 1150.2 1139.9 1149.6 1043.5 1133.6 1090.1 1054.0 1143.5 1226.4 1258.5 2020 1185.3 1163.7 1102.8 1160.4 1100.5 1130.1 1132.8 - 1101.8 1098.5 - - 2021 - - 1192.8 1083.9 1099.5 1138.5 1122.8 1105.8 1089.3 1104.6 1110.0 1121.6 2022 1185.9 1153.9 1131.7 1118.1 1141.7 1190.7 1048.6 1054.0 1087.1 1057.8 1066.6 1120.3 2023 1134.9 1124.8 1127.4 1154.3 1089.8 1139.5 1076.8 1107.5 - 1161.6 1133.0 1151.0 2024 1161.5 1135.2 1123.9 1098.0 - - - - - - - -