Above SE Iceland with temperature anomalies in 850 hPa up to -5°C and in northern France and Belgium up to -4°C and with T2m anomalies from France to Czechia and Slovakia from -1,5 to - 3°C and in Iceland almost -4°C is May 2021 the next very / extremely cold month in Europe in a row of 5 cold months since January 2021 /https://mkweather.com/a-big-european-circulation-anomaly-in-2021-totally-oppositely-such-as-in-the-world-and-showing-what-climate-change-should-bring-until-2100//.
CET anomalies from Central England until 24. May 2021 are saying about monthly anomaly -1,3°C, what is only 0,2°C above April 2021 -1,5°C anomaly (the coldest April in 142 years: https://mkweather.com/cet-record-1880-2021-april-2021-coldest-in-142-years/), simultaneously, news about a possible coldest May 2021 in Scotland in 42 years appeared in last days /https://mkweather.com/scotland-set-to-the-coldest-may-in-42-years-late-may-snowing-hit-lower-elevated-areas// and Scotland expect 3 cm of snow in elevations only around 150 MASL cca 5 days before the start of Summer 2021 /https://mkweather.com/summer-2021-in-europe-will-be-colder-such-was-forecasted//.
Rounds of ground frosts are forecasted for Europe until the end of May 2021 /https://mkweather.com/ground-frosts-hit-last-3-nights-large-parts-of-europe-until-the-end-of-may-2021-ar-still-possible// and May should really in many parts of the continent end such as the coldest in decades.
Extremely cold conditions are reported from European mountains, too /https://mkweather.com/pastures-in-the-alps-under-the-snow-cows-cant-feed-and-summer-is-knocking-on-the-door/; https://mkweather.com/czechia-1300-masl-record-1-meter-of-snow-in-may-it-has-never-appeared-so-late-2021/; https://mkweather.com/kraderica-slovenia-all-time-snow-record-for-summer-season-broken-510-cm-of-snow//
Cold 5-month period from January to May 2021 in Europe /https://mkweather.com/a-big-european-circulation-anomaly-in-2021-totally-oppositely-such-as-in-the-world-and-showing-what-climate-change-should-bring-until-2100// is arriving after long-term and ongoing La nina event /https://mkweather.com/the-next-cold-winter-strong-la-nina-in-winter-2021-2022-forecasted//, series of strong volcanic eruptions VEI4 - VEI5 and minimum activity of solar cycle /https://mkweather.com/solar-cycle-behind-nao-coldwaves-in-europe-and-la-nina-coldwaves-around-the-world-2021/; https://mkweather.com/solar-cycle-behind-nao-coldwaves-in-europe-and-la-nina-coldwaves-around-the-world-2021//.
During Summer 2021 probably thanks to La nina are waiting us many weather surprises in Europe and around the world, e.g. snowing or frosts should appear again in British Islands (Scotland) or Scandinavia and significant coldwaves with heavy rain or ground frosts in continental Europe.