Produced by GNUPLOT 4.4 patchlevel 2 985 990 995 1000 1005 1010 1015 1020 1025 1030 1035 2011 2012 2013 2014 2015 2016 2017 2018 Atmospheric pressure (mbar) Year Mon Mar 27 21:21:13 2017 Ponta Delgada, Azores Belfast Akureyri, Iceland

NAO Reference: http://polarmet.osu.edu/NAO/

METAR files: http://weather.noaa.gov/weather/metar.shtml

Archive of current indices