Marion 12Z 500hPa height 1966 - - - - - - - - 5450.7 5400.8 - - 1967 - - - - 5476.0 5416.4 5376.2 5503.0 5426.3 - 5387.8 - 1968 - - - - - - - - 5377.5 - 5417.3 5360.2 1969 5435.9 - - - - 5437.8 5412.6 - 5372.9 5421.7 5406.3 5354.8 1970 5458.8 - - 5409.9 5469.2 5475.8 5348.7 5361.2 5353.6 5443.9 5337.3 5474.2 1971 - 5595.7 5599.2 5379.8 5400.1 5443.9 5455.7 5442.0 5392.0 5476.9 5458.1 5366.0 1972 5493.3 5540.3 5563.4 5481.9 5330.0 5562.9 5342.1 5454.7 5345.5 - 5572.0 - 1973 - 5650.1 5541.2 5568.6 5418.2 5436.9 5521.5 5405.5 5390.8 - - 5545.8 1974 5521.9 5620.0 5617.7 5543.8 5578.6 5484.5 5464.2 5442.9 5476.8 5431.3 5405.5 5400.0 1975 5457.5 5536.5 5562.8 5560.7 5512.7 5498.9 5343.3 5349.4 5456.7 5513.6 5429.5 5507.0 1976 5519.5 5611.4 5530.3 5510.0 5549.1 5457.1 5380.4 5397.1 5528.2 5473.6 5437.9 5417.0 1977 5474.2 5594.5 5571.9 5511.2 5450.3 5405.0 5438.1 5399.2 5443.5 5454.3 5421.2 5460.0 1978 5488.8 5494.6 5550.4 5570.4 5404.1 5432.1 5486.4 5365.9 5418.6 5462.6 5383.8 5513.7 1979 5499.3 5572.9 5567.8 5514.4 5453.2 5457.0 5494.8 5457.3 5331.7 5450.4 5425.7 5446.3 1980 5531.0 5578.9 5619.4 5475.0 5511.0 5402.9 5420.8 5444.1 5382.1 5429.0 5386.6 5469.3 1981 5492.3 5652.1 5532.3 5478.7 5584.4 5477.2 5469.6 5449.3 5443.5 5439.7 5482.1 5523.1 1982 5516.1 5546.0 5583.4 5606.4 5466.7 5513.0 5413.4 5446.2 5472.3 5468.7 5431.7 5430.7 1983 5472.9 5563.6 5513.2 5541.3 5514.2 5416.2 5402.3 5400.3 5445.5 5488.4 5538.6 5492.6 1984 5525.3 5593.4 5539.0 5525.2 5434.1 5447.3 5408.4 5388.4 5415.4 5538.1 5483.7 5373.5 1985 5516.3 5595.7 5560.0 5583.4 5460.7 5440.3 5472.3 5399.3 5453.0 5479.0 5618.0 5502.1 1986 5530.0 5542.2 5504.2 5543.6 5406.1 5449.7 5465.2 5517.9 5447.3 5505.0 5479.7 5484.3 1987 5493.2 5547.7 5521.7 5515.7 5434.2 5423.7 5465.0 5408.0 5398.7 5495.5 5462.0 5437.4 1988 5483.3 5542.8 5530.0 5529.2 5405.2 5446.6 5314.2 5335.8 5364.0 5337.2 5464.0 5467.7 1989 5555.2 5639.6 5632.2 5476.7 5487.9 5394.8 5393.9 5371.3 5372.4 5444.5 5488.3 5512.7 1990 5558.0 5632.5 5608.3 5556.9 5377.3 5305.2 5425.9 5419.7 5430.4 5437.3 5479.6 5459.3 1991 5476.5 5563.2 5541.0 5485.3 5498.0 5520.3 5420.3 5369.7 5402.4 5505.4 5433.1 5517.0 1992 5468.7 5615.5 5612.4 5534.7 5334.7 5346.9 5339.4 5416.8 5363.3 5446.8 5496.3 5385.9 1993 5458.3 5632.9 5584.0 5541.3 5389.4 5461.7 5447.0 5448.0 5423.0 5479.0 5509.3 5445.8 1994 5492.6 5612.1 5612.7 5527.2 5524.5 5353.0 5382.3 5356.0 5404.3 5438.7 5402.0 5528.1 1995 5554.2 5532.9 5553.3 5449.0 5504.2 5377.0 5291.0 5457.1 5470.3 5427.4 5428.3 5585.2 1996 5499.0 5561.7 5569.7 5578.3 5551.9 5368.0 5450.6 5445.2 5395.7 5488.7 5462.3 5490.3 1997 5543.3 5573.9 5540.3 5553.3 5516.5 5404.8 5439.7 5382.3 5528.3 5426.5 5522.2 5458.7 1998 5480.3 5486.5 5547.7 5534.6 5529.0 5372.3 5399.0 5440.4 5360.7 5441.6 5475.9 5548.0 1999 5572.8 5515.8 5549.0 5519.3 5465.2 5412.5 5453.6 5453.3 5402.1 5491.2 5455.9 5496.0 2000 5555.0 5559.6 5523.2 5544.3 5471.4 5470.0 5418.6 5398.0 5299.2 5532.9 5534.5 5342.2 2001 5578.7 5588.9 5514.0 5590.0 5442.3 5474.0 5451.4 5382.8 5400.7 5457.5 5476.2 5480.3 2002 5565.9 5519.2 5528.9 5608.9 5433.6 5402.1 5410.0 5505.8 5395.9 5429.0 5416.7 5501.3 2003 5441.7 5553.6 5580.0 - - - - - - - 5407.6 5432.3 2004 5518.1 5577.7 5511.9 5532.4 5444.5 5512.1 5375.2 5358.3 5455.8 5440.7 5402.4 5491.3 2005 5491.9 - - 5543.7 5464.6 5362.0 5399.5 5358.2 5394.1 5477.3 5498.3 5310.5 2006 5466.9 5505.4 5492.3 5424.6 - - - - 5381.4 5494.7 5420.0 5434.6 2007 5475.7 5611.9 5609.5 5534.4 5325.9 5523.7 5330.0 5381.9 5357.0 5455.7 5396.7 5571.6 2008 5481.1 5544.1 5557.4 5447.9 5491.8 5540.0 5457.3 5390.4 5361.5 5410.7 5441.4 5451.9 2009 5530.7 5545.6 5552.9 5499.3 5567.9 5497.7 5403.0 5494.8 5338.7 5528.0 5536.3 5426.8 2010 5528.3 5555.0 5505.9 5415.0 5430.4 5453.3 5432.4 5477.5 5407.0 5460.9 - - 2011 - - - 5508.7 5507.0 5455.5 5393.5 5503.9 5310.8 5440.3 5380.7 5558.1 2012 5531.3 5482.6 5542.9 5534.1 5427.0 5377.3 5431.8 5536.7 - - - - 2013 5441.2 5551.5 5579.2 - - - - - - - - - 2014 - - - 5418.0 - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - 5521.7 5424.0 5475.0 5419.7 5392.0 5475.7 5366.5 5382.4 2017 5538.6 5538.3 5493.8 5634.2 5511.9 5310.9 5317.8 5415.0 5393.8 5415.8 5529.7 5401.4 2018 5592.2 5584.0 5512.1 5451.2 5474.8 5403.2 5500.7 5325.4 5395.4 5544.5 5508.6 5541.5 2019 5507.2 5519.6 5552.6 5540.0 5506.1 5473.5 5306.5 5315.0 5416.1 5401.9 5350.0 5508.8 2020 5504.3 5562.9 5564.5 5465.7 - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - 5422.5 5423.0 5363.3 5540.0 - 5523.3 5493.6 5562.0 2024 5659.4 5667.8 5639.5 5577.3 - - - - - - - -