MPA 12Z 300hPa temperature 1987 - - - - - - - - - - - -47.7 1988 -48.3 -44.4 -44.7 -49.1 -49.6 -53.4 -52.8 -55.0 -52.8 -53.3 -47.9 -47.5 1989 -45.9 -44.4 -46.9 -50.4 -51.7 -52.3 -51.4 -51.9 -52.7 -50.3 -47.1 -47.0 1990 - -43.6 -47.0 -49.7 -51.6 -52.4 -52.0 -52.4 -53.5 -50.7 -49.9 -49.4 1991 -44.8 -44.3 -45.2 -49.0 -50.1 -52.8 -52.3 -53.2 -52.2 -52.2 -49.3 -49.2 1992 -45.1 -46.3 -45.4 -47.2 -52.0 -53.9 -52.4 -53.5 -53.0 -49.9 -48.4 -47.1 1993 -50.0 -43.8 -47.2 -49.7 -50.5 -52.2 -52.8 -52.8 -52.3 -50.3 -49.4 -47.7 1994 -45.6 -46.0 -47.0 -50.9 -52.4 -53.2 -53.0 -53.1 -53.6 -53.7 -48.7 -47.7 1995 -47.5 -46.2 - -47.5 -51.3 -53.4 -56.3 -55.8 - -50.3 -48.5 -45.9 1996 -47.3 -46.8 -47.0 -49.4 -49.0 -52.2 -51.9 -53.1 -51.9 -51.5 -49.8 -48.1 1997 -45.8 -47.7 -44.3 -49.4 -50.2 -52.7 -53.6 -53.1 - - - - 1998 -47.0 -46.7 -48.3 -47.3 -51.3 -52.6 -52.3 -53.9 -53.9 -50.6 -47.6 -47.0 1999 -45.0 -45.0 -46.5 -46.5 -50.4 -54.9 -54.8 -53.4 -54.1 -50.5 -47.8 -46.5 2000 -46.7 -45.8 -45.4 -48.3 -50.1 -53.5 -54.4 -54.3 -54.7 -52.4 -50.7 -48.5 2001 -47.0 -46.7 -46.8 -48.0 -51.4 -53.7 -54.1 -52.2 -52.1 -50.3 -48.3 -46.9 2002 -47.1 -44.7 -49.3 -48.4 -51.7 -55.0 -53.7 -53.0 -53.3 -52.1 -50.9 -47.4 2003 -48.0 -45.4 -46.7 -48.3 -51.1 -53.4 -52.5 -52.6 -53.6 -51.3 -50.8 -49.8 2004 -44.5 -44.4 -46.1 -50.4 -51.4 -52.9 -53.5 -52.9 -53.7 -49.9 -49.7 -48.8 2005 -46.6 -44.0 -47.7 -47.6 -52.2 -55.2 -52.5 -54.7 -51.8 -51.9 -49.7 -49.3 2006 -47.0 -45.0 -46.2 -47.8 -49.7 -52.3 -54.2 -54.6 -53.3 -50.9 -49.6 -48.5 2007 -46.7 -45.5 -49.7 -50.5 -52.1 -54.2 -54.4 -54.2 -51.7 -51.2 -49.8 -45.9 2008 -46.9 -45.6 -46.1 -49.5 -50.9 -52.9 -54.9 -56.0 -52.2 -52.2 -49.5 -46.9 2009 - - - - - - - - - - - - 2010 - - - - - - - - - - - - 2011 - - -44.0 - - - - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - - - - 2018 - - - - - - - - - - - - 2019 - - - - - - - - - - - - 2020 - - - - - - - - - - - - 2021 - - - - - - - - - - - - 2022 - - - - - - - - - - - - 2023 - - - - - - - - - - - - 2024 - - - - - - - - - - - -