Sunday, 23 July 2023, 15:00 UTC
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850 hPa pseudo-potential temperature over
Central Europe, 24.07 12 UTC
Source: wetterzentrale
| Mixed-layer CAPE over Austria,
24.07 12 UTC
Source: wetterzentrale
| Maximum wind gusts over Austria,
24.07 15 UTC
Source: wetterzentrale
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Accumulated precipitation over Austria,
until 25.07 00 UTC
Source: wetterzentrale
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Severe thunderstorms
Central Europe
Issued: Sunday, 23 July 2023, 15:00 UTC
Severe thunderstorms are expected to move through the Danube Valley tomorrow, July 24, 2023. The potential for organized convection is high, with an enhanced threat for excessive precipitation, damaging wind gusts, and larger hail in the afternoon hours, likely impacting the city of Vienna.
23.07.2023
Ahead of a trough over the North Sea, the advection of moist and warm air masses will provide once again favorable conditions for thunderstorm formation across the Alps, with convective activity likely starting in the morning hours. With the nearing trough, the mid-level lifting will be enhanced and combined with the diurnal insolation, will lead to increasing convective activity during the day.
In the early afternoon hours, regional models suggest that a mesoscale convective system will likely form over the Northern Alps and move into the Danube Valley, with the risk for severe convective activity increasing east of the German-Austrian border region. In the afternoon hours, the system is expected to move quickly eastwards across the Danube Valley, threating the city of Vienna in the late afternoon hours. Threats here are mostly, the violent convective downdrafts associated with the system, if a high degree of convection organization is observed. Wind gusts upwards of 120 kph cannot be excluded as models suggests DCAPE-levels of up to 1000 J/kg to be present in the Danube Valley. Further, heavy downpours and locally large hail must be expected during the passage of the thunderstorms.
Issued: July 23, 2023, 15:00 UTC
KG
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