Joackiie
@joackiie.bsky.social
Senior meteorologist (M. Sc.), retired 😊
Passionate about all weather and science. Hiking and skiing.
Passionate about all weather and science. Hiking and skiing.
Today, the 1st of December, marks the commencement of the meteorological winter—a date designated just for climatological record-keeping purposes.
Snow cover today ↙️, as indicated by both model projections and select measurements, compared to the same date last year ↘️
Snow cover today ↙️, as indicated by both model projections and select measurements, compared to the same date last year ↘️
December 1, 2025 at 12:07 PM
Today, the 1st of December, marks the commencement of the meteorological winter—a date designated just for climatological record-keeping purposes.
Snow cover today ↙️, as indicated by both model projections and select measurements, compared to the same date last year ↘️
Snow cover today ↙️, as indicated by both model projections and select measurements, compared to the same date last year ↘️
Reposted by Joackiie
AIFS Ensemble plots are now available on PolarWx for a limited number of map projections: polarwx.com/models/?mode...
November 28, 2025 at 6:20 PM
AIFS Ensemble plots are now available on PolarWx for a limited number of map projections: polarwx.com/models/?mode...
Reposted by Joackiie
An interesting #spaceweather story developing. Airbus has made a statement saying that “Analysis of a recent event involving an A320 Family aircraft has revealed that intense solar radiation may corrupt data critical to the functioning of flight controls”
www.bbc.co.uk/news/article...
www.bbc.co.uk/news/article...
Flights disrupted as Airbus requests modifications to thousands of planes
About 6,000 plans are thought to be affected, about half the European aerospace giant's global fleet.
www.bbc.co.uk
November 28, 2025 at 8:12 PM
An interesting #spaceweather story developing. Airbus has made a statement saying that “Analysis of a recent event involving an A320 Family aircraft has revealed that intense solar radiation may corrupt data critical to the functioning of flight controls”
www.bbc.co.uk/news/article...
www.bbc.co.uk/news/article...
Once again sunny early-winter day in Switzerland, seen by Terra/Modis.
North of the Alps - above 600/700m amsl - now significant more snow than usual (source SLF).
Next week southern side of the Alps will finally also get the white stuff :-)
North of the Alps - above 600/700m amsl - now significant more snow than usual (source SLF).
Next week southern side of the Alps will finally also get the white stuff :-)
November 28, 2025 at 11:46 AM
Once again sunny early-winter day in Switzerland, seen by Terra/Modis.
North of the Alps - above 600/700m amsl - now significant more snow than usual (source SLF).
Next week southern side of the Alps will finally also get the white stuff :-)
North of the Alps - above 600/700m amsl - now significant more snow than usual (source SLF).
Next week southern side of the Alps will finally also get the white stuff :-)
Reposted by Joackiie
Updated animation of #CopernicusAtmosphere daily mean PM2.5 surface concentration forecasts showing development of Indo-Gangetic Plain #AirPollution between 1-27 November. More info/#OpenData access: ads.atmosphere.copernicus.eu/datasets/cam... #airquality @copernicusecmwf.bsky.social @ecmwf.int
November 27, 2025 at 7:53 PM
Updated animation of #CopernicusAtmosphere daily mean PM2.5 surface concentration forecasts showing development of Indo-Gangetic Plain #AirPollution between 1-27 November. More info/#OpenData access: ads.atmosphere.copernicus.eu/datasets/cam... #airquality @copernicusecmwf.bsky.social @ecmwf.int
November 2025 will end in Europe with temperatures again significantly above the 1981–2010 climatological reference period.
In the Alps, the marked anomalies of both very warm and very cold spells are expected to balance out, particularly when compared to the more recent 1991–2020 reference period
In the Alps, the marked anomalies of both very warm and very cold spells are expected to balance out, particularly when compared to the more recent 1991–2020 reference period
November 25, 2025 at 9:40 AM
November 2025 will end in Europe with temperatures again significantly above the 1981–2010 climatological reference period.
In the Alps, the marked anomalies of both very warm and very cold spells are expected to balance out, particularly when compared to the more recent 1991–2020 reference period
In the Alps, the marked anomalies of both very warm and very cold spells are expected to balance out, particularly when compared to the more recent 1991–2020 reference period
The recent onset of winter has resulted in above-average snowfall across Switzerland for late November; however, conditions are expected to change at the beginning of December.
November 24, 2025 at 2:28 PM
The recent onset of winter has resulted in above-average snowfall across Switzerland for late November; however, conditions are expected to change at the beginning of December.
Reposted by Joackiie
Derived Ash Height product from @eumetsat.int #meteosat10 suggested that parts of the volcanic ash cloud from the eruption of #HayliGubbi in Ethiopia may have reached heights in the 18-20 km range (black).
November 23, 2025 at 8:39 PM
Derived Ash Height product from @eumetsat.int #meteosat10 suggested that parts of the volcanic ash cloud from the eruption of #HayliGubbi in Ethiopia may have reached heights in the 18-20 km range (black).
Last night brought widespread frost, locally record lows, lower lows than last winter and alpine cold-air pools with –36.8°C surpassing temperatures in northern Norway!
Forecasts indicate a thaw on Monday, with milder conditions persisting until Christmas (Zurich ensemble) 😲
Forecasts indicate a thaw on Monday, with milder conditions persisting until Christmas (Zurich ensemble) 😲
November 23, 2025 at 7:40 AM
Last night brought widespread frost, locally record lows, lower lows than last winter and alpine cold-air pools with –36.8°C surpassing temperatures in northern Norway!
Forecasts indicate a thaw on Monday, with milder conditions persisting until Christmas (Zurich ensemble) 😲
Forecasts indicate a thaw on Monday, with milder conditions persisting until Christmas (Zurich ensemble) 😲
Following >50 cm of fresh snow locally over the past three days (@slfdavos.bsky.social), today in the Swiss Alps sunny weather with wintry snow cover (blue-tinted).
Low stratus over the lowlands, neatly streaked by northeasterly winds.
Low stratus over the lowlands, neatly streaked by northeasterly winds.
November 22, 2025 at 12:06 PM
Following >50 cm of fresh snow locally over the past three days (@slfdavos.bsky.social), today in the Swiss Alps sunny weather with wintry snow cover (blue-tinted).
Low stratus over the lowlands, neatly streaked by northeasterly winds.
Low stratus over the lowlands, neatly streaked by northeasterly winds.
Thick smog over India and Kashmir valley, fog/low stratus in the valleys of Nepal ... as seen by Terra/MODIS on Saturday noon.
November 22, 2025 at 11:26 AM
Thick smog over India and Kashmir valley, fog/low stratus in the valleys of Nepal ... as seen by Terra/MODIS on Saturday noon.
Arctic air from Greenland, fresh snow, and clear Saturday-night: perfect recipe for severe cold across Central Europe by Sunday morning.
Only southern Alpine lakes remained frost-free; some alpine valleys may reach –30°C!
A thaw is already expected next week...
Only southern Alpine lakes remained frost-free; some alpine valleys may reach –30°C!
A thaw is already expected next week...
November 21, 2025 at 8:43 AM
Arctic air from Greenland, fresh snow, and clear Saturday-night: perfect recipe for severe cold across Central Europe by Sunday morning.
Only southern Alpine lakes remained frost-free; some alpine valleys may reach –30°C!
A thaw is already expected next week...
Only southern Alpine lakes remained frost-free; some alpine valleys may reach –30°C!
A thaw is already expected next week...
Reposted by Joackiie
A polar vortex of confusion simonleewx.com/2025/11/20/a...
A polar vortex of confusion
Meteorologists have a historical penchant for giving names to atmospheric phenomena which, in today’s world, sound rather like phrases made up to fit a dramatic headline than real scientific …
simonleewx.com
November 20, 2025 at 11:52 AM
A polar vortex of confusion simonleewx.com/2025/11/20/a...
Reposted by Joackiie
1,019 glaciers have disappeared since 1973 in Switzerland! ✝️
1st nationwide assessment of vanished glaciers:
>40% of the glaciers inventoried in 1973
~13% (47±3 km²) of total glacier area loss! 🧊🔥
But, as it is based on the latest inventory (from 2016), the actual figures are far much higher! 📈 😰
1st nationwide assessment of vanished glaciers:
>40% of the glaciers inventoried in 1973
~13% (47±3 km²) of total glacier area loss! 🧊🔥
But, as it is based on the latest inventory (from 2016), the actual figures are far much higher! 📈 😰
November 19, 2025 at 12:05 PM
1,019 glaciers have disappeared since 1973 in Switzerland! ✝️
1st nationwide assessment of vanished glaciers:
>40% of the glaciers inventoried in 1973
~13% (47±3 km²) of total glacier area loss! 🧊🔥
But, as it is based on the latest inventory (from 2016), the actual figures are far much higher! 📈 😰
1st nationwide assessment of vanished glaciers:
>40% of the glaciers inventoried in 1973
~13% (47±3 km²) of total glacier area loss! 🧊🔥
But, as it is based on the latest inventory (from 2016), the actual figures are far much higher! 📈 😰
Recent SSTAs (sea surface temperature anomalies) clearly indicate La Niña in the tropical Pacific, expected to persist until the end of winter.
This has little direct impact on our winter weather; instead, the seas around Europe—currently much warmer than average—play a more significant role
This has little direct impact on our winter weather; instead, the seas around Europe—currently much warmer than average—play a more significant role
November 18, 2025 at 5:53 PM
Recent SSTAs (sea surface temperature anomalies) clearly indicate La Niña in the tropical Pacific, expected to persist until the end of winter.
This has little direct impact on our winter weather; instead, the seas around Europe—currently much warmer than average—play a more significant role
This has little direct impact on our winter weather; instead, the seas around Europe—currently much warmer than average—play a more significant role
Reposted by Joackiie
The global record 134 °F surface temp, measured in Death Valley in 1913, is "implausible" based on other records from that date, claims a paper in #BulletinAMS. The authors suggest the temperature was recorded at an improper location.
More on the blog: https://bit.ly/3LCKPgS
More on the blog: https://bit.ly/3LCKPgS
Global Record in Question: Could Death Valley lose its claim to “world’s hottest place”?
New analysis of the Death Valley record for hottest weather-related air-surface temperature recorded on Earth suggests the record is “implausible.”…
bit.ly
November 18, 2025 at 5:44 PM
The global record 134 °F surface temp, measured in Death Valley in 1913, is "implausible" based on other records from that date, claims a paper in #BulletinAMS. The authors suggest the temperature was recorded at an improper location.
More on the blog: https://bit.ly/3LCKPgS
More on the blog: https://bit.ly/3LCKPgS
Arctic air surging from Greenland brought last night the lowest temperatures in the High Alps since early March: Capanna Margherita near Monte Rosa recorded –21.9°C.
First fresh snow (coloured blue) down to ~700 m in eastern Switzerland and southern Germany.
First fresh snow (coloured blue) down to ~700 m in eastern Switzerland and southern Germany.
November 18, 2025 at 10:50 AM
Arctic air surging from Greenland brought last night the lowest temperatures in the High Alps since early March: Capanna Margherita near Monte Rosa recorded –21.9°C.
First fresh snow (coloured blue) down to ~700 m in eastern Switzerland and southern Germany.
First fresh snow (coloured blue) down to ~700 m in eastern Switzerland and southern Germany.
Record warmth still over southern Europe/northern Africa↙️ ... but in 150 hours with arctic air from Greenland follows record cold ↘️
November 16, 2025 at 10:27 AM
Record warmth still over southern Europe/northern Africa↙️ ... but in 150 hours with arctic air from Greenland follows record cold ↘️
First half of November 2025 was in Europe mostly too warm.
In Switzerland about +1 (south) to +5 (mountains) degrees warmer than usual - now followed by a colder second half.
In Switzerland about +1 (south) to +5 (mountains) degrees warmer than usual - now followed by a colder second half.
November 16, 2025 at 8:32 AM
First half of November 2025 was in Europe mostly too warm.
In Switzerland about +1 (south) to +5 (mountains) degrees warmer than usual - now followed by a colder second half.
In Switzerland about +1 (south) to +5 (mountains) degrees warmer than usual - now followed by a colder second half.
Reposted by Joackiie
The 2025 Atlantic Hurricane Season officially ends on November 30, but the outlook is very quiet out there, so it very likely ended on October 31 this year. Overall, it was a slightly above-average season with some strange characteristics.
Summary of the Unusual 2025 Hurricane Season
Updates and summaries on tropical Atlantic activity... including easterly waves, tropical storms, subtropical storms, and hurricanes.
bmcnoldy.blogspot.com
November 14, 2025 at 4:58 PM
The 2025 Atlantic Hurricane Season officially ends on November 30, but the outlook is very quiet out there, so it very likely ended on October 31 this year. Overall, it was a slightly above-average season with some strange characteristics.
Strong southerly foehn (gusts to 107 km/h) again yields anomalously warm conditions north of the Alps for this season.
However, textbook description of a warm wind with good visibility does not hold today: Saharan dust at ~3 km altitude reduces visibility!
saentis.roundshot.com#/compare/195...
However, textbook description of a warm wind with good visibility does not hold today: Saharan dust at ~3 km altitude reduces visibility!
saentis.roundshot.com#/compare/195...
November 14, 2025 at 11:38 AM
Strong southerly foehn (gusts to 107 km/h) again yields anomalously warm conditions north of the Alps for this season.
However, textbook description of a warm wind with good visibility does not hold today: Saharan dust at ~3 km altitude reduces visibility!
saentis.roundshot.com#/compare/195...
However, textbook description of a warm wind with good visibility does not hold today: Saharan dust at ~3 km altitude reduces visibility!
saentis.roundshot.com#/compare/195...
Reposted by Joackiie
Circling the world over the last couple of nights, the aurora borealis put on quite a spectacular show in the sky of the northern hemisphere.
November 14, 2025 at 5:02 AM
Circling the world over the last couple of nights, the aurora borealis put on quite a spectacular show in the sky of the northern hemisphere.
Reposted by Joackiie
1,600+ fossil fuel lobbyists at COP30, outnumbering every delegation except Brazil
This isn’t ‘dialogue’; it’s the industry responsible for the crisis hijacking the negotiations meant to stop it
If this doesn’t make you furious, you’re not paying attention
www.theguardian.com/environment/...
This isn’t ‘dialogue’; it’s the industry responsible for the crisis hijacking the negotiations meant to stop it
If this doesn’t make you furious, you’re not paying attention
www.theguardian.com/environment/...
Fossil fuel lobbyists outnumber all Cop30 delegations except Brazil, report says
One in every 25 participants at 2025 UN climate summit is a fossil fuel lobbyist, according to Kick Big Polluters Out
www.theguardian.com
November 14, 2025 at 6:12 AM
1,600+ fossil fuel lobbyists at COP30, outnumbering every delegation except Brazil
This isn’t ‘dialogue’; it’s the industry responsible for the crisis hijacking the negotiations meant to stop it
If this doesn’t make you furious, you’re not paying attention
www.theguardian.com/environment/...
This isn’t ‘dialogue’; it’s the industry responsible for the crisis hijacking the negotiations meant to stop it
If this doesn’t make you furious, you’re not paying attention
www.theguardian.com/environment/...
Despite the impressively cold conditions anticipated across Central Europe next week: all available models indicate that the winter of 2025/2026 (1 December to 28 February) is expected to be overall warmer than average.
November 13, 2025 at 10:28 AM
Despite the impressively cold conditions anticipated across Central Europe next week: all available models indicate that the winter of 2025/2026 (1 December to 28 February) is expected to be overall warmer than average.
Despite a robust boundary-layer inversion exceeding 10K, fog was notably absent this morning over the Swiss Plateau. Persistent dense high cloud cover remained, while MTG imagery revealed dense Saharan dust-cloud near the Balearics—most accurately depicted by the Monarch and Met Office UM models.
November 13, 2025 at 8:32 AM
Despite a robust boundary-layer inversion exceeding 10K, fog was notably absent this morning over the Swiss Plateau. Persistent dense high cloud cover remained, while MTG imagery revealed dense Saharan dust-cloud near the Balearics—most accurately depicted by the Monarch and Met Office UM models.