The first serious heatwaves should hit Europe soon, a big contrast on composites between E Europe and C Asia in May 2025, and 5 cm hailstorms in France, floods for the Alps / Balkan / the Carpathians ahead
Marek Kučera 
Monday, 19. May 2025 has brought cold morning with Tmins -1/+1°C in a few European countires. Elseborn, Belgium, reported -0,6°C, Varena, Lithuania, -0,4°C, Bialystok, Poland, -0,2°C, Reims, France, +0,2°C, Rohrbach, Austria, +0,2°C, Akinci, Turkey, +0,4°C, Bamberg, Germany, +0,9°C, Baranovici, Belarus, +0,9°C.
Large hail of up to 5 cm was reported in parts of France on Monday, 19. May (videos below).
Cold weather pattern continues almost all May 2025, expect of the first days, with forecasted frosts later this week in many parts of continental Europe, again and colder Tmins and Tmaxes almost until the end of the month.
This anomaly, such we can see on composites maps, is created between pressure high near the British Islands and pressure low above European Russia. These pressure areas are creating low temperature anomaly in Eastern half of Europe with 2,5-week anomalies below -3°C and a historic heatwave in Central Asia, with temepratures up to +46°C /https://mkweather.com/madness-in-central-asia-brutal-heatwaves-up-to-46c-in-spring-turkmenistan-456c-uzbekistan-445c-kazakhstan-440c-siberia-366c-heatwaves-in-the-middle-e/; https://mkweather.com/unbelievable-40c-in-siberia-in-may-423c-above-50n-in-kazakhstan-china-with-470c-iran-486c-floods-in-china-611-mm-24-h-and-vietnam//.
However, hot air is according to ECMWF prepared for the first June 2025 decade for all Europe, with a possible first serious big heatwave, with temperatures above +30°C, shortly locally up to +35°C in continental Europe. Spain, Italy and Turkey will be hot, too, around +40°C in the hottest places.
According to updated accumulated precipitation map from wxcharts.com, floods will be in the next period possible mainly in the Alps, especially Austria, Switzerland, Slovenia and northern Italy, such as across Balkan and in the Carpathians. E.g. Slovenia appears very bad on the maps.
Air temperature and geopotential anomaly between Eastern Europe and Central Asia / British Islands and Ural region on 1.-17. May 2025. Source: https://psl.noaa.gov/data/composites/day/
Temperature anomaly for Europe on 2.-9. June 2025. Source: https://charts.ecmwf.int/products/extended-anomaly-2t?base_time=202505180000&projection=opencharts_europe&valid_time=202506090000
The last 7 days of extreme meteorological events in Europe on ESWD. Source: https://eswd.eu/cgi-bin/eswd.cgi
Updated accumulated precipitation in Europe until 4. June 2025. Source: https://www.wxcharts.com/?panel=default&model=gfs,gfs,gfs,gfs®ion=europe&chart=accprecip,850temp,wind10mkph,snowdepth&run=12&step=384&plottype=10&lat=51.500&lon=-0.250&skewtstep=0
HAILSTORMS IN FRANCE WITH HAIL UP TO 5 CM DIAMETER
Noé, France. Source: https://www.facebook.com/photo.php?fbid=10237125667909200&set=p.10237125667909200&type=3, https://www.facebook.com/photo.php?fbid=10237125670949276&set=p.10237125670949276&type=3
Mauzac, France. Source: https://www.facebook.com/photo/?fbid=1781818182647850&set=a.106615783088055
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