Syowa 00Z 500hPa height 1968 - - 5057.4 4977.8 5027.7 4968.6 4823.1 4845.8 4771.3 4930.7 5021.5 5108.2 1969 5197.0 5130.4 5011.2 5029.4 4947.8 5071.7 4811.4 4778.8 4816.3 4991.9 5038.9 5122.3 1970 5086.0 5061.6 5045.3 4977.8 4923.8 4935.4 4874.9 4788.9 4879.4 4933.8 5051.4 5149.4 1971 5184.6 5097.6 5021.5 4973.6 5028.8 4858.7 4889.1 4850.1 4918.4 4882.9 4974.0 5180.8 1972 5171.6 5092.5 5031.6 5069.6 4972.9 5016.0 4855.2 4967.3 4893.2 4890.5 4950.0 5125.4 1973 5155.0 5071.6 4978.7 4970.0 5024.7 4994.1 4862.1 4808.9 4878.4 4910.6 4995.8 5039.5 1974 5165.6 5040.5 5015.5 4991.4 5010.0 4979.9 4907.6 4981.3 4858.8 4913.5 5071.7 5172.1 1975 5185.5 5101.9 5076.7 4931.6 5100.4 4962.8 4973.4 4867.1 4847.3 4878.6 5004.2 5141.1 1976 5192.1 5069.9 5021.4 4928.2 4872.4 4977.1 4858.3 4860.9 4811.5 4857.1 5084.5 5277.0 1977 5195.2 5103.4 5034.4 5019.8 5035.0 5014.4 5000.4 4988.3 4829.7 4892.1 4972.9 5096.7 1978 5058.4 5094.6 5037.6 4969.4 4971.3 4931.6 4962.3 4773.5 4884.8 4952.7 5029.0 5101.4 1979 5131.3 5080.3 5016.7 5025.2 4950.7 4868.6 4800.2 4807.8 4848.7 4954.6 5055.5 5189.8 1980 5127.4 5092.8 5092.2 5043.6 5002.5 4902.0 4998.2 4935.8 4948.8 4870.7 5075.5 5096.7 1981 5133.7 5110.2 5055.7 5008.1 4972.5 4926.4 5044.0 5000.2 4906.0 4855.7 4979.4 5055.4 1982 5153.0 5080.0 4961.3 4948.8 4963.4 4893.1 4891.5 4897.2 4837.8 4937.4 5095.7 5220.2 1983 5151.7 5111.1 5028.5 5016.8 5019.5 4943.3 4871.3 4833.1 4909.2 4900.9 4958.5 5063.2 1984 5159.1 5107.2 5023.1 4988.2 5062.2 4939.7 4913.1 4926.0 4877.2 4876.1 5026.0 5211.1 1985 5177.3 5099.7 5055.8 5023.5 4941.4 4984.7 4842.3 4832.2 4868.6 4878.1 4949.4 5032.6 1986 5144.3 5171.9 5079.4 4962.3 5016.5 4967.9 4859.4 4948.7 4827.8 4890.5 5007.6 5045.6 1987 5183.3 5113.1 5052.4 5009.9 5016.2 4978.5 4957.7 4821.7 4872.5 4896.6 4982.8 5101.3 1988 5185.1 5080.8 5115.0 4986.9 5016.7 5094.0 4850.8 4874.7 4960.0 5040.1 4972.2 5090.9 1989 5159.4 5084.1 5039.1 5010.0 4851.0 4904.1 4840.9 4884.1 4903.2 4904.1 5027.1 5114.6 1990 5138.2 5056.9 5036.1 5056.1 5078.4 4972.6 5039.8 4829.0 4766.2 4978.7 5031.1 5082.4 1991 5065.1 5155.5 5014.7 4974.1 4965.4 5014.2 4953.9 4891.4 4901.1 4884.8 5007.6 5225.8 1992 5181.3 5115.2 5074.3 5012.5 5061.7 5044.5 4916.5 4822.0 4823.6 4926.3 4934.2 5088.5 1993 5202.9 5068.6 5003.2 4982.7 4949.2 4945.8 4855.6 4842.4 4889.6 4931.9 4985.2 5057.0 1994 5090.5 5052.8 4993.0 5015.0 4961.5 5053.1 4937.2 4878.5 4895.5 4920.7 5036.2 5047.3 1995 5087.4 5103.8 5036.5 4996.7 4914.7 4936.4 5011.3 4921.7 4766.9 4956.2 5014.8 5087.7 1996 5126.7 5146.7 4988.1 4985.2 4926.3 4966.3 5014.1 4967.5 5075.3 4926.6 5073.2 5117.7 1997 5130.3 5090.4 4980.3 5006.2 4943.5 5027.3 4894.8 4886.7 4882.7 4915.6 5134.9 5126.6 1998 5092.3 5050.1 5011.5 4882.3 4985.1 4933.3 4900.3 4884.6 4881.2 4905.9 4945.0 5043.0 1999 5116.1 5111.6 5009.7 4913.7 4917.5 5042.3 4860.2 4940.8 4951.7 4848.7 4987.6 5006.5 2000 5042.0 5044.7 4974.3 4995.3 4889.0 4989.8 4922.4 4938.5 4972.0 4900.8 5058.6 5134.0 2001 5114.7 5124.3 5036.1 4960.9 5012.6 5026.6 4990.6 4854.7 4838.5 4928.5 4963.6 5029.4 2002 5112.4 5015.4 5091.1 5048.6 5103.1 4985.9 4980.3 4878.0 4916.5 5052.9 4993.1 5053.8 2003 5149.7 5121.8 5036.8 4964.4 4989.4 4976.3 4893.6 4867.5 4860.7 4934.4 5048.6 5183.5 2004 5100.0 5156.6 4989.3 4971.3 4945.1 4894.3 4787.9 4830.0 4817.3 4935.7 4988.0 5127.0 2005 5125.7 5043.5 5056.6 4962.0 4950.5 5025.6 4946.3 4915.8 4838.3 4886.5 4969.3 5214.4 2006 5112.3 5072.1 4999.4 4987.3 4928.9 4960.2 4816.5 5065.9 4905.3 4869.0 5014.9 5063.8 2007 5128.8 5059.7 5049.3 5028.3 5017.5 5049.1 5043.3 4918.8 4932.0 4960.8 5109.4 5017.1 2008 5074.4 5011.4 5046.0 5060.6 5007.1 4910.7 4927.5 4842.8 4879.0 4872.1 4972.0 5042.2 2009 5097.9 5050.8 5039.6 4984.8 5096.2 5066.2 4978.0 4904.3 4907.0 4955.0 5067.7 5101.9 2010 5193.7 5168.6 5049.3 4979.3 4948.5 4827.0 4837.4 4801.4 4890.4 4867.1 4961.9 5129.0 2011 5148.7 5099.3 5063.3 5055.6 4953.9 5038.5 4960.3 4991.3 4931.0 4955.0 5076.2 5060.3 2012 5045.2 5120.8 5010.6 4963.0 4991.1 4899.7 4878.7 4894.3 4877.0 4958.5 5128.2 5150.0 2013 5143.5 5071.9 4984.3 4943.4 4940.0 5021.3 4889.0 4980.7 4965.9 4921.3 5082.3 5097.6 2014 5148.7 5076.3 5019.7 4935.6 5012.7 4963.5 4880.7 4926.3 4928.2 4930.0 5024.1 5037.5 2015 5117.2 5037.7 4993.0 4907.9 4971.5 4944.3 4847.1 4810.0 4871.3 4987.5 5088.1 5081.6 2016 5080.0 5072.9 5029.6 4992.1 4985.0 4881.1 4861.2 4977.9 4861.7 4983.6 5087.4 5152.7 2017 5185.0 - 5052.9 4982.7 4955.8 4907.3 4902.9 4858.8 4848.6 - - - 2018 - 5053.3 5058.6 5035.6 5052.5 5058.9 4850.8 4934.4 4838.9 4936.4 - 5094.5 2019 5119.3 - - 4994.5 - 4905.0 4955.0 4846.0 4823.6 5057.0 - - 2020 - 5085.0 - 5060.0 4964.6 4933.5 4947.3 4932.3 4932.0 4870.8 4982.0 - 2021 - 4993.0 5155.4 4961.8 4932.0 4917.1 4923.3 4868.2 4890.0 4915.8 5042.0 5071.8 2022 5154.1 5069.5 5024.0 5042.3 4989.5 5053.0 - 4886.9 - 4942.4 4919.4 - 2023 - - 5070.8 4999.0 4958.1 4985.6 4915.3 4913.6 - 5001.8 5008.6 5089.4 2024 5113.8 5079.1 5002.3 4958.0 - - - - - - - -