Gough 12Z 500hPa height 1966 - - - - - - 5512.8 - - - 5572.3 - 1967 - - - - 5536.2 5524.6 5522.4 - 5555.9 - - - 1968 - 5780.5 - - - 5579.0 - - 5525.8 - - 5610.3 1969 - 5717.4 - - - 5595.7 - - - 5639.3 5679.7 - 1970 - 5751.8 5694.7 5691.9 5563.8 5537.2 5544.5 5617.4 5561.7 5617.0 5682.1 5639.8 1971 - 5789.2 5654.0 5617.5 5595.8 5567.1 5530.6 5532.6 5600.5 5578.7 5654.9 5708.9 1972 5618.8 5736.8 5703.2 5606.4 - - 5652.0 5584.9 5572.8 - - - 1973 5724.2 5728.6 5718.7 5680.6 5656.2 5631.8 5516.7 5571.7 - 5604.7 5658.2 5690.8 1974 5745.8 5730.0 5711.6 5626.1 5573.8 5575.2 5499.6 5512.7 5528.6 5587.1 5627.1 5634.0 1975 5727.0 5700.9 5720.4 5651.9 5556.0 5513.8 5555.6 5591.1 5600.0 5597.3 5661.5 5732.0 1976 5697.9 5738.3 5766.2 5642.5 5639.0 5554.8 5623.8 5603.8 5584.5 5680.5 5657.0 5577.1 1977 5673.3 5696.4 5766.0 5622.6 5696.0 5585.5 5486.4 5540.4 5628.9 5598.7 5666.0 5598.8 1978 5720.7 5745.0 5689.6 5713.8 5588.2 5559.3 5626.1 5615.5 5640.8 5632.4 5625.2 5632.4 1979 5712.7 5706.7 5687.3 5638.6 5660.0 5545.9 5583.7 5637.7 5620.4 5647.8 5649.5 5631.7 1980 5752.4 5760.4 5663.6 5666.8 5559.7 5664.7 5568.1 5562.0 5588.3 5624.0 5746.1 5650.0 1981 5763.9 5741.4 5735.2 5626.4 5572.7 5602.8 5495.4 5608.3 5527.4 5561.0 5680.7 5752.4 1982 5694.3 5766.7 5773.9 5718.7 5521.0 5524.0 5618.1 5559.0 5553.0 5612.0 5622.0 5571.0 1983 5615.2 5756.8 5771.7 5630.0 5553.3 5563.4 5606.9 5528.7 5485.0 5667.1 5686.3 5617.7 1984 5620.0 5695.2 5702.3 5625.9 5560.3 5547.0 5538.1 5549.4 5489.6 5633.0 5644.3 5645.2 1985 5662.3 5693.6 5718.0 5675.0 5605.2 5488.3 5551.7 5516.1 5524.0 5568.7 5558.0 5697.1 1986 5682.3 5704.1 5724.2 5634.0 5546.8 5568.3 5508.4 5582.4 5578.2 5542.3 5674.2 5689.7 1987 5647.7 5693.9 5703.0 5618.6 5556.5 5565.9 5574.8 5547.1 5587.8 5568.0 5638.1 5659.6 1988 5690.7 5728.2 5614.5 5717.1 5564.3 5539.3 5553.4 5558.7 5482.0 5635.0 5688.6 5703.3 1989 5679.0 5711.2 5661.7 5697.4 5556.1 5616.2 5553.9 5519.3 5507.3 5608.4 5663.4 5692.9 1990 5667.9 5691.8 5716.5 5637.0 5582.6 5673.3 5516.9 5598.6 5621.4 5616.4 5638.3 5650.7 1991 5733.7 5712.2 5765.7 5603.4 5582.6 5565.7 5585.8 5620.3 5546.0 5599.7 5655.2 5583.0 1992 5695.2 5657.9 5687.1 5576.9 5627.1 5573.4 5507.7 5604.8 5636.9 5615.4 5632.4 5657.1 1993 5632.6 5660.4 5661.6 5660.7 5611.9 5562.7 5473.2 5545.2 5480.3 5549.7 5613.7 5742.0 1994 5738.7 5719.3 5682.9 5642.7 5577.1 5597.0 5607.4 5627.4 5561.7 5581.3 5607.3 5605.2 1995 5657.7 5682.1 5711.7 5688.0 5635.5 5596.3 5580.3 5455.2 5548.0 5599.4 5651.4 5675.2 1996 5721.3 5704.1 5692.0 5617.6 5561.0 5473.3 5560.3 5481.7 5516.3 5634.7 5637.3 5661.9 1997 5722.7 5772.1 5734.2 5701.7 5591.3 5526.1 5571.9 5571.9 5493.7 5583.5 5573.3 5630.7 1998 5727.3 5723.8 5711.1 5598.5 5500.0 5474.4 5642.9 5555.5 5595.7 5647.4 5632.4 5702.3 1999 5684.8 5755.6 5634.7 5649.0 5615.0 5484.0 5436.7 5532.4 5566.3 5594.3 5609.5 5719.1 2000 5689.7 5738.4 5696.3 5650.3 5605.3 5512.7 5568.0 5545.4 5477.3 5624.6 5582.2 5700.4 2001 5701.5 5727.9 5678.1 5656.4 5545.5 5522.0 5552.3 5617.7 5559.0 5653.4 5668.0 5689.3 2002 5704.2 - 5636.2 5579.0 5599.6 5606.5 5511.9 5574.5 5562.1 5515.2 5641.1 5622.1 2003 5674.0 5635.9 5689.3 5578.9 5581.7 5564.5 5554.8 5562.6 5581.9 5611.4 5632.3 5681.8 2004 5721.7 5703.2 5711.7 5609.3 5609.6 5554.6 5654.5 5582.4 5588.7 5641.6 5565.4 5611.6 2005 5716.8 5743.2 5694.8 5659.3 5600.3 5607.9 5525.2 5552.3 5572.5 5522.7 5628.3 5710.3 2006 - 5646.9 5761.7 5732.3 5638.7 5580.7 5492.8 5504.4 5599.3 5599.0 5639.7 5659.0 2007 5673.9 5730.4 5701.1 5622.5 5579.4 5511.0 5526.1 5525.8 5488.1 - - - 2008 5750.0 5715.6 5726.7 5656.8 5505.5 5538.6 5500.3 5593.0 5470.5 5574.2 5652.1 5699.6 2009 5718.5 5789.2 5710.7 5674.6 - - 5676.9 5477.9 5601.2 5647.2 5560.4 5674.8 2010 5716.8 5692.6 5723.3 5678.2 - - - 5527.5 5595.6 5601.3 5688.4 5728.7 2011 5734.3 5699.6 5681.0 5737.8 5624.8 5579.6 5641.0 5460.7 5551.1 5572.4 5696.3 5684.1 2012 5655.5 - - - - - - - - 5683.6 - - 2013 - - 5704.3 5642.1 - - - - 5578.0 5680.0 5633.1 5678.6 2014 5682.8 5700.5 5787.6 5670.4 5541.4 5591.1 5655.0 - 5519.0 5637.8 5710.0 5719.3 2015 5667.0 5745.8 5702.6 5678.6 5570.3 5619.3 5711.5 - 5511.2 5539.0 5638.6 5641.3 2016 5717.1 5715.7 5739.7 5610.4 - 5532.5 5559.7 5490.0 5601.1 5567.9 5650.0 5567.9 2017 5652.9 5726.1 5688.6 5661.4 5603.6 5535.3 5567.4 5632.2 5590.4 5635.2 5661.4 5701.9 2018 5732.8 5743.9 5729.6 5630.7 5560.7 5483.8 5518.5 5650.0 5552.1 5574.0 5657.2 5609.2 2019 5745.4 5730.9 5724.8 5630.5 5571.7 5480.4 - - - - - - 2020 - - - - - - - - - 5580.0 5623.2 5729.6 2021 5701.8 5778.1 5676.1 5645.0 5614.0 5587.2 5535.5 5551.3 5557.8 5625.0 5646.4 5760.0 2022 5677.3 5711.2 5715.0 - - - - - 5587.0 5627.7 - - 2023 - - - - - - - - - 5645.9 5530.4 5707.1 2024 5729.5 5746.8 5714.0 5730.0 - - - - - - - -