al_meteo

@al_meteo@meteo.social

Meteorologist 👨‍🎓 • Storm Chaser 🌪 • Hobby Photographer 📸 • Forecaster 📈📉 @ German Meteorological Service (https://social.bund.de/@DeutscherWetterdienst)

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al_meteo, to random German

Ω-Blocking => Extreme Weather x 3.

al_meteo, to greece German

Potentially catastrophic in due to "hybrid" precipitation event (synoptic-scale+convective). Over a large area widespread 150-300 mm in 48 h, in exposed mountainous areas and due to thundery intensifications locally even significantly higher totals above 500 mm.


image/png

al_meteo, to Weather German

600 km long (official cloud atlas name: ) over the western Mediterranean. It is caused by a southwards moving pressure wave, which itself is formed by a shallow cold air outbreak, canalized and accelerated through the Rhone and Aude valleys (/).


video/mp4
video/mp4

al_meteo, to Weather German

3 simultaneous |s over N-America, the tropical N-Atlantic, and the W-Mediterranean. Shown is the geopotential, which is (near) record high in all 3 areas. The strong upper anticyclones favor large-scale, strong subsidence and adiabatic heating.



al_meteo,

The backward for clearly show how the air is trapped in the broad circulation of the anticyclone, descending as if in a swirl and heating.


al_meteo,

The heat is therefore "home-made" and not advective. This form of heat waves seems to have increased, due to persistent weather systems. They can be much more intense than the heat dominated by air mass advection. Those that can combine both processes are particularly dramatic.

al_meteo, to Weather German

has developed multiple rain bands. Unlike tropical cyclones, however, the strongest gusts tend to occur in the outer bands. The storm center now reaches East Frisia.


@radaromega

Radar Animation. You can see several bands of rain, winding around an imagined center, the "eye" of the storm.

al_meteo, to Weather German

has developed multiple rain bands. Unlike tropical cyclones, however, the strongest gusts tend to occur in the outer bands. The storm center now reaches East Frisia.


@RadarOmega

al_meteo, to random German

in all its glory. What was once a frontal wave has developed into a full-blown storm cyclone. The strongest gusts (>120 kph) occur at the top of the so-called "cloud head" (currently Dutch coast). This area of strong winds will extend to NW-Germany. @kachelmannwetter
https://kachelmannwetter.com/de/sat/dd938a6fdae4701aedd593b53273b857/satellit-hd-5min.html

Satellite Animation. One can see a cloud whirl with center near the Dutch Coast

al_meteo, to Weather German

in the making or: a bit of satellite meteorology.
The upper trough (area of dry air: yellow/orange) is beginning to interact with the frontal zone. The leaf-shaped thickening in the cloud cover indicates that a disturbance (frontal wave) has already developed.



al_meteo, to Weather German

There is something really serious going on in the models for Wednesday. A classic rapid cyclogenesis with massive dry intrusion. Very unfortunate timing especially for the North Sea neighbors , and . In a narrow stretch on the southwest flank of the system, damaging wind gusts could occur due to a sting and/or cold jet.



video/mp4
video/mp4

al_meteo, to Europe German

An unusual summer threatens parts of west-central on Wednesday. The fast-moving secondary low could bring gale-force, possibly even hurricane-force winds in small areas. The satellite image simulated by IFS shows the storm as an impressive cloud whirl.
Image: @kachelmannwetter


al_meteo, to Europe German

Building in parts of southwest/central and the western late this week. The animations show the IFS forecast of temperature at the 850-hPa level and the probabilities for maximum temperatures above 35 °C. Accordingly, a larger area could be affected by extreme heat on Sunday and Monday. Locally, up to 40 °C could be possible. In the African Mediterranean rim it will be particularly hot with highs up to 45 °C.


video/mp4
video/mp4

al_meteo, to Germany German

Dinner is served: the fresh from Idar-Oberstein impressively shows the potential in parts of (EML, robust CAPE, neat DLS). Further east, LLS and helicity should be added with deepening surface low.

All conditions fulfilled for severe thunderstorms, including potential.



al_meteo, to random German

Ernüchternd, wie sich immer mehr Menschen mit ihrer anekdotischen Schein-Evidenz von "45 Grad anno dazumal" über Fakten hinwegsetzen. Lasst die Wissenschaftler ihren Job machen und schenkt ihnen etwas mehr Vertrauen!

Zur schwülen Hitze und starker Wärmebelastung die Videobotschaft vom @DeutscherWetterdienst
https://youtu.be/KWUW635VF_w




al_meteo, to random German

The global mean temperature exceeds the threshold of +1.5 degrees for the first time during the boreal summer, favoured by the emerging El Nino. Previously, this was only the case during winter and spring. The 1.5 degree target is wobbling precariously.
@CopernicusECMWF
https://climate.copernicus.eu/tracking-breaches-150c-global-warming-threshold?utm_source=tw&utm_medium=socialmedia&utm_campaign=globalwarminglimit-june23

al_meteo, to random German

First hot spell in parts of west-central Europe for this year. It will be the warmest day of the year so far, with highs of 30 °C in some areas. However, the air mass is relatively dry and the nights are still quite cool, so that the heat is not yet so stressful.




al_meteo, to random German

Toxic plume of Canadian spreads towards . Extreme fine concentrations of over 400 μg/m³ (PM2.5), however, we also reach in : when atmospheric inversion coincides with and/or high density. :(

image/png

al_meteo,

Frankfurt-Höchst, New Year's Eve 2019/2020, PM2.5 von 643 μg/m³.

https://kachelmannwetter.com/de/luftqualitaet/hessen/pm25-feinstaub/20200101-0200z.html#obs-detail-DEHE005-6h

al_meteo, to random German

Last June night was one of the coldest in recent decades in northern and eastern Germany. Some records for the lowest temperature were even broken near the ground.

The cause was a fresh inflow of very dry polar air, which was able to cool down optimally in clear and windless conditions. The dry soils also played a role.





al_meteo,

@mariusor measured temperatures. The anomalies are much higher, widespread -6 K.

al_meteo, to random German

Gut 90 Kilometer trennen und zurzeit im Westen. Brilon 13 Grad, Wetzlar 26 Grad.
Credit: @kachelmannwetter

al_meteo, to random German

The stage is set for some severe in . In the area of a (moisture) convergence, 1000-2000 J/kg CAPE is built up. With overall rather weak shear and straight hodographs, the focus is on splitting cells, heavy rain and hail accumulations.

Estimated potential for severe thunderstorms in Germany today (22th May). Highest risk in the western half of Germany, lower risk in southern and southeastern parts, no risk in the northeast.

al_meteo,

Nevertheless, low level shear/helicity is available along the wind convergence as well as through a slight veering at the northern edge of the low pressure trough. A single tornado is therefore not completely ruled out. In addition, 400-700 DCAPE increases the downburst potential.

JZ_Lpz, to random

Die Update-Woche bei @Kachelmannwettr geht weiter, heute nun wurden die Radiosonden auf eine neue Darstellung umgestellt:
https://kachelmannwetter.com/de/radiosonden-werte/usa/cape-2m/20230512-1200z.html#obs-detail-R72357
Wir hoffen das findet allgemeine Zustimmung :)
1/

al_meteo,

@JZ_Lpz sieht gut aus! Plant ihr eine dazu passende Umstellung der Prognosesoundings?

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