Novembers 1948-2024 | Highest & Lowest MSLP

I’ve just added a search routine to find the lowest and highest MSLPMSLP Mean sea level pressure is the pressure at sea level, or, when measured at a given elevation on land, the station pressure reduced to sea level assuming an isothermal layer at the station temperature. in a given rectangular area for any period back to 1948 from reanalysis data I’ve downloaded. It was not too difficult to do in code, except when the area spanned the Greenwich meridian! Unfortunately the grid is rather coarse at 2.5° x 2.5°, but it suffices because the amount of data for a finer grid would be enormous. Here are the results I’ve generated for the highest and lowest MSLP around the British Isles for all Novembers back to 1948. The latest reanalysis data I have only extends to the 19th of November this year, so it may well be that storm Bert has beaten the 950.8 hPahPa A Hectopascal is the SI unit of pressure and identical to the Millibar from 2010 in the last few days.