Relay_Station 00Z pressure 1995 - 641.9 638.2 636.8 629.8 633.6 643.5 630.5 621.1 634.1 639.6 642.7 1996 646.0 646.7 635.0 634.6 629.1 635.0 638.4 638.0 642.9 630.3 644.1 647.6 1997 645.9 642.9 634.2 637.3 630.3 640.2 626.3 628.9 629.2 632.5 647.3 648.4 1998 643.4 640.4 636.8 623.8 635.7 633.7 630.4 629.2 630.6 630.7 636.3 640.1 1999 646.7 643.2 637.1 630.3 630.7 644.4 630.6 632.7 634.0 626.0 636.4 636.8 2000 639.9 638.2 634.3 636.6 631.1 637.6 632.3 634.6 635.8 627.7 644.3 649.6 2001 646.0 644.4 638.8 632.3 638.3 638.7 635.7 627.4 628.0 630.6 637.7 641.5 2002 645.8 637.6 643.4 639.0 646.8 638.3 639.1 629.2 633.0 642.6 637.4 641.0 2003 649.9 646.2 639.4 632.9 635.0 640.1 630.8 629.5 629.7 632.7 640.3 652.5 2004 645.5 649.1 635.4 634.0 633.7 629.3 622.8 626.5 626.9 634.7 638.7 649.9 2005 648.2 - - 633.2 635.4 640.4 633.0 630.7 628.8 - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - - 2010 - 646.1 638.6 633.4 633.5 625.7 623.3 622.1 628.7 628.7 634.6 646.2 2011 649.1 641.7 639.2 638.6 631.8 639.8 637.3 636.7 632.9 631.4 644.9 638.2 2012 638.4 642.3 636.4 631.9 633.2 634.1 626.3 630.9 629.0 633.6 645.2 647.3 2013 646.7 638.7 631.6 632.6 629.8 641.6 630.5 637.3 639.1 633.2 643.6 643.9 2014 647.0 641.3 634.7 631.7 637.2 635.7 628.3 631.3 635.4 631.0 638.3 640.5 2015 644.3 637.2 633.1 631.0 632.0 633.0 624.1 623.2 623.8 637.4 641.3 642.8 2016 640.1 639.8 633.9 634.9 633.1 625.0 626.1 638.7 624.0 634.5 645.0 648.1 2017 649.2 644.3 639.1 631.1 633.9 630.2 632.2 623.7 627.2 636.8 637.1 642.4 2018 643.6 640.3 639.4 638.6 639.7 641.8 629.4 633.9 626.6 630.4 633.0 644.4 2019 643.9 646.0 636.7 635.2 634.6 627.0 632.5 629.0 624.8 639.8 645.5 651.7 2020 647.9 641.7 633.8 637.6 634.4 634.5 631.9 633.7 631.5 629.8 639.4 640.6 2021 641.2 635.6 642.3 630.3 631.9 632.1 633.3 628.7 629.2 631.5 637.2 641.3 2022 646.1 640.1 637.0 632.5 633.8 642.2 627.8 631.3 623.8 632.9 630.0 637.9 2023 638.1 638.8 638.0 639.1 632.3 638.4 631.6 631.4 635.8 633.9 636.6 641.0 2024 641.6 638.3 634.8 630.8 632.0 633.5 642.3 642.7 630.9 - - -