Davis 12Z 500hPa height 1971 - - - - - - - - - 4958.1 5009.0 5201.6 1972 5207.4 5103.4 5065.8 - - - - - - - - 5151.2 1973 5174.2 5056.3 4953.7 - - - - - - 4984.3 5051.3 4997.0 1974 5111.4 5066.4 4980.0 - - - - - - 4988.3 5100.7 5217.4 1975 5191.3 5115.7 5038.7 - - - - - - - 5029.3 5138.4 1976 - 5098.9 5012.3 - - - - - - 4901.9 5093.0 5261.6 1977 5207.7 5117.5 4995.5 - - - - - - 4933.1 5012.0 5102.6 1978 5026.4 - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - 4997.4 4971.7 4824.2 4921.7 4884.2 4971.9 4941.7 4942.3 5047.7 5149.4 1990 5175.7 5081.8 5028.4 5094.7 5048.4 4954.8 5083.2 4862.3 4815.7 4968.7 5059.3 5121.6 1991 5069.3 5101.6 5018.4 4997.8 4975.7 5037.6 5056.7 4916.8 4936.6 4888.6 5041.5 5205.5 1992 5153.9 5159.5 5044.0 4970.0 5077.1 5030.5 4897.4 4867.5 4806.0 4943.8 5031.2 5048.3 1993 5226.2 5043.0 5006.1 4950.8 4817.3 4899.6 4827.1 4814.3 4849.6 4887.1 4986.7 5063.8 1994 5112.6 5016.5 4966.2 5005.0 4974.7 - 4971.3 4849.0 4913.4 4918.9 5079.6 5047.3 1995 5092.4 5098.2 5012.4 5016.1 4919.2 4955.3 5078.2 4895.5 4792.8 4927.9 5046.2 5068.3 1996 5151.8 5131.1 4998.6 4974.0 4891.3 4989.5 4935.6 4960.9 5025.9 4927.0 5077.5 5131.1 1997 5127.2 5080.8 4965.1 5005.0 4906.8 4997.2 4832.1 4876.0 4824.7 4935.2 5054.7 5171.0 1998 5103.6 5084.1 4993.4 4818.6 4919.7 4914.2 4911.1 4871.6 4937.1 4932.6 4974.4 5029.2 1999 5105.9 5098.2 5035.5 4906.1 4914.6 5046.1 4882.6 4862.7 4894.7 4832.0 4993.2 5006.7 2000 5067.3 5038.0 5006.2 5022.8 4899.3 5012.9 4914.0 4899.9 4964.2 4828.8 5079.6 5171.0 2001 5123.9 5154.5 5028.6 4903.3 4965.1 4913.0 4941.9 4855.1 4845.6 4904.9 4983.0 5077.5 2002 5084.4 5018.7 5074.9 4983.9 5088.9 4951.0 4961.9 4853.9 4941.7 5034.5 5025.7 5049.5 2003 5199.9 5127.1 5030.7 4929.5 4953.8 5021.8 4938.4 4862.3 4914.9 4914.5 5039.7 5169.5 2004 5139.2 5181.4 4986.2 4943.9 4978.8 4903.8 - 4849.9 4830.6 4964.9 5045.5 - 2005 - - - - - - - - - - 5050.9 5243.2 2006 5120.0 5081.1 - - - - - - - - 5107.4 5080.3 2007 5146.5 5051.3 5015.6 5051.2 5013.9 5033.6 5051.1 4949.7 4905.1 4953.9 5064.0 5062.8 2008 5077.5 5026.8 - - - - - - - - - 5176.9 2009 5147.3 5139.5 - - - - - - - - 5092.1 5093.1 2010 5200.1 5142.1 5040.1 4971.6 4942.0 4867.1 4782.7 4815.3 4915.2 4915.1 5018.6 5122.5 2011 5209.8 5050.8 5034.0 4987.5 4939.8 5012.8 5015.3 4865.0 4945.8 4904.4 5131.1 5015.8 2012 5065.9 5110.6 4994.9 4980.5 4949.4 4960.4 4842.1 4880.0 4857.2 4923.9 - 5179.2 2013 5165.9 - - - - - - - - - 5127.5 5114.8 2014 5146.3 5070.8 5018.2 4934.9 5042.4 4923.7 4895.5 4866.3 4958.1 4950.6 5042.7 5050.1 2015 5122.5 - 4953.1 4920.7 4893.3 4941.1 4868.7 4847.7 4868.3 4973.2 5025.6 5112.5 2016 5074.1 5053.0 - - - - - - - - 5103.5 5131.7 2017 5182.0 5103.2 5002.7 4882.9 4931.7 4919.6 4947.2 4845.2 4849.7 4919.4 5048.2 5092.1 2018 5128.2 5100.0 5043.5 5067.2 4940.7 5039.1 4927.0 4990.7 4829.6 4883.8 4966.7 5108.0 2019 5109.0 5140.7 5036.0 5020.4 4990.3 4945.9 4944.8 4910.6 4867.7 5033.9 5135.7 5213.5 2020 5204.2 5092.4 4951.0 5001.4 4988.3 4991.7 4967.4 5003.0 4922.3 4953.3 5083.3 5048.7 2021 5084.2 5037.5 5039.0 4948.3 4928.4 4910.0 4966.9 4900.3 4871.0 4949.4 5009.3 5058.1 2022 5111.3 5048.2 5031.0 4953.7 4976.8 5052.1 4910.7 4936.0 4860.0 4960.6 4941.7 5031.3 2023 5036.8 5078.8 5069.1 5027.3 4953.8 4992.4 4947.3 4871.2 4963.3 4926.0 4972.7 5070.0 2024 5116.1 5036.2 4998.7 4942.3 - - - - - - - -