LWT

June 2019 was the fifth most cyclonic since 1871

This June has already started on a very cyclonic note, and interestingly there are already five June’s from this century already in the top twelve, with June 2012 ranked as second highest.

Looking at the Jenkinson Lamb objective weather data from the CRU at the UEA, I find that May 1896 was the most anticyclonic across the British isles in the record that started in 1871. I’ve gauged this on the combined frequency of the daily anticyclonic or hybrid anticyclonic LWT. May 1896 scores an extremely high 74% anticyclonic for the whole month, which is way ahead of the next year in the list, 1871 with 63%. My findings are backed up by the weather charts for the month based on the American reanalysis data. This May is already off to a...