Mika Rantanen

@mikarantane.bsky.social

Researcher at the Finnish Meteorological Institute. Climate change, extreme weather and attribution of extreme events. PhD in meteorology from the University of Helsinki.

One more country to the 40 °C club! Pinsk, Belarus reached 40.4 °C today, setting a new national heat record. The list of European countries that have never reached 40 °C is getting smaller: basically just the Nordic and Baltic countries, and Ireland. Maybe some microstates too.

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In Saarbrücken-Burbach wurde heute ein Temperatur-Höchstwert von 41,3 °C gemessen. Dieser Wert wurde in Deutschland erstmals seit Beginn der Wetteraufzeichnungen erreicht. Der Messwert ist vorläufig und kann sich nach einer vom DWD durchgeführten zeitnahen Qualitätsprüfung nochmals ändern

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The June 2026 heatwave will go down as the most statistically anomalous heat event ever observed at any time of year in metropolitan France. The 4-day mean temperature anomaly breached the extraordinary +10°C mark.

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Tough night? A historic warm night in capital with overnight low of 22.6C at #London Heathrow, a record breaking warm night of any month. The former record was 22.3C in July 2016. Until this heatwave the June highest minimum was 20.8C (1976) this has been broken on 3 nights maybe 1 more to add.

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Paris just had their hottest night on record. The temperature did not drop below 26.4 °C at the Montsouris weather station. With daytime highs rising into the 40 degrees yesterday and today in the city of millions, it is unfortunately a deadly heatwave for many.

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++BREAKING++ Leading climate scientists in the UK have written to senior editors in broadcast media - and OFCOM and IPSO: "To express our concern about recent media coverage of extreme weather, climate change and net-zero and to urge you…to inform public audiences of the scientific links"

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The European heatwave will move eastward in the coming days and the forecasts for the weekend are insane: close to 40 °C for the Baltic Sea coast. It's only a matter of time when the Nordic countries record their first 40 °C.

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Our latest research with @jnicolasclimate.bsky.social @annalombardi.bsky.social @claudiadinapoli.bsky.social shows how much heat stress has changed from the climate of the 1970s to our current climate, due to climate change, and how the number of people affected has increased over the last 50 yrs 🥵⬇️

Springer Nature@springernature.com · last mo.

One billion more people face at least one day of extreme heat stress each year compared with the 1970s, says @natclimate.nature.com paper. Findings show global heat stress is intensifying across events during day, night, and during both day and night: spklr.io/63322E3AC8 #ClimateChange 🧪

There is the risk that some events at London Climate Action Week will be cancelled this week because of an extraordinary heatwave. The @metoffice.gov.uk has just upgraded to red alert on Wedneday with London at 40°C. Previous June record was 35.6°C. This is an emergency.

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Historian toinen kerta, kun Met Office antaa punaisen tason varoituksen helteestä. Ensimmäinen kerta oli heinäkuussa 2022 - silloin Briteissä mitattiin 40,3 astetta. Nyt voidaan päästä lähelle. Erittäin voimakas helleaalto huipentuu lähipäivinä Euroopassa.

Met Office - weather and climate@metoffice.gov.uk · last mo.

⚠️⚠️🔴 Red weather warning issued 🔴⚠️⚠️ Extreme heat across parts of central/southern England and Wales Wednesday 0900 - Thursday 2100 Latest info 👉 bit.ly/WxWarning Stay #WeatherAware ⚠️

ECMWF weekly mean temperature anomaly shows the highest category (>10°C above normal) over France this week. Typically, these colors appear only during winter warm spells, when temperature variability is the largest. Seeing them in mid-summer says a lot about the intensity of this heatwave.

2 m temperature weekly mean anomaly from ECMWF sub-seasonal forecast. The colors are red in Europe, with > 10 °C above normal over France.

According to BBC weather, the forecast *10-day average maximum temperature" for Paris, France is 37 °C. And two days with 40 °C. ☀️🌡️ Probably not far away from the hottest 10-day period ever recorded in Paris.

Screenshot from BBC weather (https://www.bbc.com/weather/2988507), showing extremely high temperatures for Paris for the coming week.

The latest forecasts for the western European heatwave are concerning. The subtropical ridge stalls and the extremely warm airmass (T850 ~ 20 °C) will remain in place for at least a week or so. Next week is going to be brutal hot in Spain, France, the UK... ECMWF forecasts for Sun 21 and Sat 27:

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Nykyinen säätyyppi, jossa Etelä- ja Länsi-Eurooppa paahtuu helteissä, kun Suomessa on viileämpää, on tyypillistä El Niño-vuosille. Olin Iltalehdellä vastailemassa "oman elämänsä meteorologin" ja muiden nimimerkkien kysymyksiin El Niñosta ja vähän muustakin: www.iltalehti.fi/saauutiset/a...

Miten käy Golf-virran? Asiantuntija vastaa

Iltalehden Säästudiossa keskusteltiin juhannuksen säästä ja ilmastoon liittyvistä ilmiöistä. Vieraaksi saapui tutkija Mika Rantanen.

iltalehti.fi