The pressure wave from the #Tonga eruption travelled as far as the UK and was recorded on the weather station. You can clearly see 2 waves on the barometer graph.
Shockwave from Hunga Tonga-Hunga Haʻapai eruption plume, seen by pressure change at UK sites. Wave moves southward down the country 18-20Z 15Jan. The same wave, but travelling the other way around the globe, moves northward up the country 01-03Z 16Jan. @RoostWeather @Silkstiniho
We could be heading for a record low on the @maccweather weather station in #macclesfield overnight. Already down to -3.4°C. Side roads are sheet ice so take care!