#omegablock — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #omegablock, aggregated by home.social.
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Persistent Heat Dome Expands East: 40°C+ Highs Target Central Europe and the Balkans
A high-amplitude upper-level ridge is expanding eastward across Central #Europe and the #Balkan Peninsula, locking in a widespread #heatwave with daytime highs above 40 °C through the first week of August. Driven by a persistent #HeatDome synced with an #OmegaBlock pattern, an exceptionally warm and dry air mass continues surging from #NorthAfrica, pushing upper-air thermal anomalies into the 99th percentile with excessive heat across northern #Italy, #Hungary, #Croatia, #Serbia, and the surrounding regions.
The main atmospheric engine driving this multi-week heat event is a stubborn high-pressure system parked directly over the heart of the continent. As sinking air compresses and warms the lower troposphere, peak surface temperatures across low-lying river basins, including the Po Valley and the Pannonian Basin, are forecast to range from 40 °C to 43 °C, while continental dry winds keep humidity low and accelerate soil moisture loss.https://www.severe-weather.eu/global-weather/heat-dome-heatwave-europe-balkan-august-2026-mk/
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Persistent Heat Dome Expands East: 40°C+ Highs Target Central Europe and the Balkans
A high-amplitude upper-level ridge is expanding eastward across Central #Europe and the #Balkan Peninsula, locking in a widespread #heatwave with daytime highs above 40 °C through the first week of August. Driven by a persistent #HeatDome synced with an #OmegaBlock pattern, an exceptionally warm and dry air mass continues surging from #NorthAfrica, pushing upper-air thermal anomalies into the 99th percentile with excessive heat across northern #Italy, #Hungary, #Croatia, #Serbia, and the surrounding regions.
The main atmospheric engine driving this multi-week heat event is a stubborn high-pressure system parked directly over the heart of the continent. As sinking air compresses and warms the lower troposphere, peak surface temperatures across low-lying river basins, including the Po Valley and the Pannonian Basin, are forecast to range from 40 °C to 43 °C, while continental dry winds keep humidity low and accelerate soil moisture loss.https://www.severe-weather.eu/global-weather/heat-dome-heatwave-europe-balkan-august-2026-mk/
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A dangerous #heatWave is coming next week
by Alex Fitzpatrick
6-26-2026" '#HeatDome' is forecast to bring dangerously high temperatures to much of the eastern half of the U.S. next week.
"The extreme heat could last through July 4 celebrations.
"Driving the news: 'Widespread temperatures into the 90s to low 100s, combined with high humidity, will result in heat indices approaching or exceeding 105-110 in many places,' NOAA forecasters write.
" 'Overnight lows will also be quite warm, with some record high minimums possible, bringing little to no relief from the heat in the nighttime hours.'
"Such conditions affect 'anyone without cooling/hydration as well as health systems, industries, and infrastructure.'
"Meanwhile: The #HeatWave baking Europe this week wouldn't be possible without #ClimateChange, a World Weather Attribution rapid study found."
Read more:
https://www.axios.com/2026/06/26/heat-wave-dome-julyArchived version:
https://archive.ph/hDxfJ#ClimateCrisis #MinneapolisMN #ChicagoIL #NashvilleTN #AtlantaGA #ExtremeHeat #ClimateDiaryUS #HeatWave #OmegaBlock
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A dangerous #heatWave is coming next week
by Alex Fitzpatrick
6-26-2026" '#HeatDome' is forecast to bring dangerously high temperatures to much of the eastern half of the U.S. next week.
"The extreme heat could last through July 4 celebrations.
"Driving the news: 'Widespread temperatures into the 90s to low 100s, combined with high humidity, will result in heat indices approaching or exceeding 105-110 in many places,' NOAA forecasters write.
" 'Overnight lows will also be quite warm, with some record high minimums possible, bringing little to no relief from the heat in the nighttime hours.'
"Such conditions affect 'anyone without cooling/hydration as well as health systems, industries, and infrastructure.'
"Meanwhile: The #HeatWave baking Europe this week wouldn't be possible without #ClimateChange, a World Weather Attribution rapid study found."
Read more:
https://www.axios.com/2026/06/26/heat-wave-dome-julyArchived version:
https://archive.ph/hDxfJ#ClimateCrisis #MinneapolisMN #ChicagoIL #NashvilleTN #AtlantaGA #ExtremeHeat #ClimateDiaryUS #HeatWave #OmegaBlock
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An ‘Omega block’ is behind Europe’s heat wave — can it happen in Canada?
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An ‘Omega block’ is behind Europe’s heat wave — can it happen in Canada?
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Deaths, disruptions across #Europe: What you should know about the #heatwave
Experts say the #ClimateCrisis is making Europe’s #heatwaves more frequent and more intense.
By Caolán Magee
Published On 24 Jun 202624 Jun 2026Excerpt: "What is causing the heatwave?
"Meteorologists said the extreme temperatures are driven by a heat dome, a vast area of high pressure that has become parked over Western Europe.
"The phenomenon is being sustained by what is known as an omega block, a weather pattern named for the Greek letter because of the similar shape it creates in the atmosphere.
"Under normal conditions, the jet stream carries weather systems from west to east. During an omega block, however, that flow becomes distorted, trapping a ridge of high pressure between two low-pressure systems.
"The result is that hot, stagnant air remains locked over the same region for days or even weeks. The UK Met Office said Britain currently lies on the boundary between the high-pressure system and cooler air to the northwest, which is creating sharp contrasts between hotter conditions in the south and east and cooler, wetter weather farther north."
#ExtremeHeat #ExtremeTemperatures #ClimateDiary #ClimateCrisis #ClimateChange #HeatDome #OmegaBlock #EuropeWx #ClimateDiaryEurope #RecordBreakingHeat
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Deaths, disruptions across #Europe: What you should know about the #heatwave
Experts say the #ClimateCrisis is making Europe’s #heatwaves more frequent and more intense.
By Caolán Magee
Published On 24 Jun 202624 Jun 2026Excerpt: "What is causing the heatwave?
"Meteorologists said the extreme temperatures are driven by a heat dome, a vast area of high pressure that has become parked over Western Europe.
"The phenomenon is being sustained by what is known as an omega block, a weather pattern named for the Greek letter because of the similar shape it creates in the atmosphere.
"Under normal conditions, the jet stream carries weather systems from west to east. During an omega block, however, that flow becomes distorted, trapping a ridge of high pressure between two low-pressure systems.
"The result is that hot, stagnant air remains locked over the same region for days or even weeks. The UK Met Office said Britain currently lies on the boundary between the high-pressure system and cooler air to the northwest, which is creating sharp contrasts between hotter conditions in the south and east and cooler, wetter weather farther north."
#ExtremeHeat #ExtremeTemperatures #ClimateDiary #ClimateCrisis #ClimateChange #HeatDome #OmegaBlock #EuropeWx #ClimateDiaryEurope #RecordBreakingHeat
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Looking at the French #energygrid at 1545 Local time. The #heatdome #omegablock has wind at almost zero. #nuclear down as plants shut down as rivers are too hot to cool/cooling too hot for fish. #Solar is maxed at 15GW. Solar leaders #Germany and #Spain are providing electricity imports.
Take heed of what works, and what doesn’t. #climatecrisis #carney #canpoli. Nuclear is a complete waste of money.
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Looking at the French #energygrid at 1545 Local time. The #heatdome #omegablock has wind at almost zero. #nuclear down as plants shut down as rivers are too hot to cool/cooling too hot for fish. #Solar is maxed at 15GW. Solar leaders #Germany and #Spain are providing electricity imports.
Take heed of what works, and what doesn’t. #climatecrisis #carney #canpoli. Nuclear is a complete waste of money.
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Europe's #heatwave curbs French #NuclearPlants
By Forrest Crellin and Hugo Lhomedet
June 24, 2026"The heat has reduced output at the #SaintAlban2 and #Bugey 3 reactors on the Rhone river in eastern France, and the #Nogent2 reactor on the Seine southeast of Paris.
"The #Golfech2 reactor on the Garonne river in southwest France went offline late Monday due to the heat.
"French environmental regulations force nuclear operator #EDF to reduce output when river temperatures reach a certain threshold to protect local ecosystems.
"It was not certain how long the current heatwave, driven by a weather pattern known as an #OmegaBlock due to its shape, which allows temperatures to build day after day, would last.
"Europe is warming at more than twice the global average, the World Meteorological Organisation has said, which makes prolonged heat episodes increasingly likely."
https://www.reuters.com/business/energy/europes-heatwave-curbs-french-nuclear-plants-2026-06-24/
#NoNukes #ClimateChange #ClimateCrisis #Heatwaves #NuclearPlants #France
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Europe's #heatwave curbs French #NuclearPlants
By Forrest Crellin and Hugo Lhomedet
June 24, 2026"The heat has reduced output at the #SaintAlban2 and #Bugey 3 reactors on the Rhone river in eastern France, and the #Nogent2 reactor on the Seine southeast of Paris.
"The #Golfech2 reactor on the Garonne river in southwest France went offline late Monday due to the heat.
"French environmental regulations force nuclear operator #EDF to reduce output when river temperatures reach a certain threshold to protect local ecosystems.
"It was not certain how long the current heatwave, driven by a weather pattern known as an #OmegaBlock due to its shape, which allows temperatures to build day after day, would last.
"Europe is warming at more than twice the global average, the World Meteorological Organisation has said, which makes prolonged heat episodes increasingly likely."
https://www.reuters.com/business/energy/europes-heatwave-curbs-french-nuclear-plants-2026-06-24/
#NoNukes #ClimateChange #ClimateCrisis #Heatwaves #NuclearPlants #France
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What is driving Europe’s heatwave?
Europe is baking under a scorching heatwave, with health warnings in place across western and central parts of…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #BreakingNews #CentralEurope #Europe #Headlines #Heatwave #omegablock #Topstories #TopStories #weathersystems
https://www.newsbeep.com/us/721611/ -
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Europe’s Excessive Heat Warning: Record June Heat Dome Spikes France to 45°C, UK Eyes 40 °C
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Europe’s Excessive Heat Warning: Record June Heat Dome Spikes France to 45°C, UK Eyes 40 °C
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An #OmegaBlock Will Be In Place Next Week. Here’s What That Means #weather -wise. weather.com/2026/05/22/f...
An Omega Block Pattern Is Ahea... -
A rare late-April cold air mass intrusion heads for Eastern Europe, risking frost damage to vineyards ahead of the growth season.#april #arcticairmass #europe #frost #may #omegablock #PolarVortex #snow #spring2026forecast #winterstorm
A Powerful Omega Block is Funneling an Arctic air Intrusion into Europe, Threatening the 2026 Growing Season -
Friends - We have rain and fog here,courtesy of the weather phenom, #OmegaBlock. It means days of rain. So, get your camera out for a rainy-day #WeatherPhoto.
ESM
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1/ #Extremwetterlage|n häufen sich durch die #Klimakrise.
Der #OmegaBlock überflutet derzeit vor allem die Anrainer des östlichen Mittelmeeres.@correctiv_org hat zu dem Thema Infos zusammengestellt:
Twitter-🧵 von @WeatherProf zum Omega-Block mit Grafik
https://twitter.com/WeatherProf/status/1699278684283159017Ohne Todesopfer bleibt das #Extremwetter der #Klimakatastrophe auch diesmal nicht
#Unwetter in #Südosteuropa Weitere Tote nach ungewöhnlich starkem Regen
https://www.tagesschau.de/ausland/europa/tuerkei-griechenland-starke-unwetter-100.html -
"At the same time, in the high latitudes of Canada and the far North Atlantic, a very blocked #JetStream pattern has persisted for weeks. These persistent weather patterns have a significant impact on the underlying sea surface temperatures."
This #OmegaBlock has a hand in the wildfires in Canada, warmed up the northeast Atlantic, and has resulted in "record-shattering heat" in the tropical Atlantic.
3/N
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"At the same time, in the high latitudes of Canada and the far North Atlantic, a very blocked #JetStream pattern has persisted for weeks. These persistent weather patterns have a significant impact on the underlying sea surface temperatures."
This #OmegaBlock has a hand in the wildfires in Canada, warmed up the northeast Atlantic, and has resulted in "record-shattering heat" in the tropical Atlantic.
3/N
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Shower Forecast Update
Update Fri 06/02 @ 9:10 AM — Despite reasonably high CAPE and thermal instability, the lack of soil moisture feedback and marginal available precipitable water (PWAT= 1.3") will result in a low degree of shower activity Friday afternoon.
V ... https://theweatherguy.net/blog/this-weeks-weather-99/
#PhiladelphiaWeatherOutlook #OmegaBlock #RapidRefreshForecastSystem #RexBlock #RRFS
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Friday Forecast Update
Update Thu 6/01 @ 10:38 PM —Tonight’s models just coming in show widely scattered showers and thunderstorms moving down from the north Friday afternoon. Peak time about 5-6 PM but possible as early as 3 PM. Widely scattered is the operativ ... https://theweatherguy.net/blog/this-weeks-weather-99/
#PhiladelphiaWeatherOutlook #OmegaBlock #RapidRefreshForecastSystem #RexBlock #RRFS
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Friday Forecast Update
Update Thu 06/01 @ 4:30 PM — Most models are forecasting high temperatures around 92º-93º on Friday afternoon.
That said, the ECMWF, German ICON and Canadian HRDPS are showing some suburbs of Philadelphia reach 95º-96º.
The NBM wh ... https://theweatherguy.net/blog/this-weeks-weather-99/
#PhiladelphiaWeatherOutlook #OmegaBlock #RapidRefreshForecastSystem #RexBlock #RRFS
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Possibly some thunderstorms early Friday evening?
Update Wed 05/31 @ 5:35 PM — The incredible weather we've been having is really quite perfect, BUT there's been a significant deficit in rainfall in may areas, especially from Philadelphia and the suburbs immediatel ... https://theweatherguy.net/blog/this-weeks-weather-99/
#PhiladelphiaWeatherOutlook #OmegaBlock #RapidRefreshForecastSystem #RexBlock #RRFS
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Ninety Degrees Plus on Friday. Light showers possible Saturday
Update Wed 05/31 @ 9:39 AM — The upper level ridge will move eastward enough on Friday to give us some true summer temperatures. There's a range of forecast high temperatures, but here's the latest ECMWF and NBM to give a sense of wh ... https://theweatherguy.net/blog/this-weeks-weather-99/
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Blocking Pattern Retrogrades 90º on Friday.
Update Tue 05/30 @ 11:50 AM — Not only is the blocking pattern expected to persist this week, but the latest GFS has joined the ECMWF as showing a deepening of the upper low over the Newfoundland and a retrograde of the entire block westward—
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THIS WEEK’S WEATHER
#weather #paweather #wx #pawx #philadelphia #phillywx
Blocking Pattern Entrenches
It's been over three weeks since the immediate Philadelphia area has had any significant rain.
While the term "pattern" is sometimes loosely used regarding weather changes, this is beginning to look like a true persistent pattern for our area, all the result of a re ... https://theweatherguy.net/blog/this-weeks-weather-99/
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WaPo: "A bizarrely stagnant weather pattern called an “omega block” has been dominating the atmosphere over North America"..."Maximiliano Herrera, a climate historian known for keeping track of temperature records, described the readings as “extraordinary.”" #OmegaBlock #Wx #ExtremeWeather #climate https://www.washingtonpost.com/weather/2023/05/04/canada-record-temperatures-climate-northwest/
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WaPo: "A bizarrely stagnant weather pattern called an “omega block” has been dominating the atmosphere over North America"..."Maximiliano Herrera, a climate historian known for keeping track of temperature records, described the readings as “extraordinary.”" #OmegaBlock #Wx #ExtremeWeather #climate https://www.washingtonpost.com/weather/2023/05/04/canada-record-temperatures-climate-northwest/
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WEEKEND WEATHER FORECAST
#weather #paweather #wx #pawx #philadelphia #phillywx #broadstreetrun
Sunday Forecast Update
Update Sun 04/30 @ 4:24 PM — Areas of very heavy rain continue, especially in New Jersey, where large areas have received close to 5" of rain since Friday. An additional inch or more is possible!
The latest HRRR shows some heavy downpours with thunder ... https://theweatherguy.net/blog/weekend-weather-forecast-214/
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WEEKEND WEATHER FORECAST
#weather #paweather #wx #pawx #philadelphia #phillywx #broadstreetrun
Sunday Forecast Update
Update Sun 04/30 @ 9:52 AM — The rain has moved in as expected and periods of rain, heavy at times, will fall throughout the day and evening hours. Total accumulations for the day will be in the 0.9" to 1.5" range with some locally higher amounts.
... https://theweatherguy.net/blog/weekend-weather-forecast-214/
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WEEKEND WEATHER FORECAST
#weather #paweather #wx #pawx #philadelphia #phillywx #broadstreetrun
Sunday Forecast Update
Update Sun 04/30 @ 9:52 AM — The rain has moved in as expected and periods of rain, heavy at times, will fall throughout the day and evening hours. Total accumulations for the day will be in the 0.9" to 1.5" range with some locally higher amounts.
... https://theweatherguy.net/blog/weekend-weather-forecast-214/
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WEEKEND WEATHER FORECAST
#weather #paweather #wx #pawx #philadelphia #phillywx #broadstreetrun
Forecast Update and the Broad Street Run
Update Sat 04/29 @ 10:25 PM — A quick update. The precipitation forecast from this afternoon remains intact. It showed fairly heavy rain through 2 PM.
The latest models tonight show heavier and possibly stormier weather during th ... https://theweatherguy.net/blog/weekend-weather-forecast-214/
