Articles | Volume 25, issue 12
https://doi.org/10.5194/nhess-25-4807-2025
https://doi.org/10.5194/nhess-25-4807-2025
Brief communication
 | 
04 Dec 2025
Brief communication |  | 04 Dec 2025

Brief communication: How extreme was the thunderstorm rain in Vienna on 17 August 2024? A temporal and spatial analysis

Vinzent Klaus, Johannes Laimighofer, and Fabian Lehner

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Cited articles

Amorim, R. and Villarini, G.: Impacts of Urbanization on the Riverine Flooding in Major Cities Across the Eastern United States, Hydrological Processes, 38, e70027, https://doi.org/10.1002/hyp.70027, 2024. a
Asquith, W. H.: lmomco – L-moments, censored L-moments, trimmed L-moments, L-comoments, and many distributions, r package version 2.5.1, https://doi.org/10.32614/CRAN.package.lmomco, 2024. a
dpa: Rekordregen in Wien – Frau unter Bus geschwemmt, ZEIT ONLINE, https://www.zeit.de/news/2024-08/17/rekordregen-in-wien-frau-unter-bus-geschwemmt (last access: 25 November 2025), 2024. a
Formayer, H. and Fritz, A.: Temperature dependency of hourly precipitation intensities – surface versus cloud layer temperature: PRECIPITATION INTENSITIES: SURFACE VERSUS CLOUD LAYER TEMPERATURE, International Journal of Climatology, 37, 1–10, https://doi.org/10.1002/joc.4678, 2016. This research has been supported by the Austrian Climate and Energy Fund under the program “ACRP13” (grant no. KR20AC0K17974). a
GeoSphere Austria: Messstationen Stundendaten V2, https://doi.org/10.60669/9BDM-YQ93, 2024. a, b
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Short summary
On 17 August 2024, a thunderstorm in Vienna led to a record-breaking rainfall of 107 mm in two hours. An analysis of the exceptionally long hourly rain gauge time series (since 1941) estimates this event's return period at 700 years. The extremity of the event is further confirmed by neighboring weather stations and rain-radar data. Linking the return period to atmospheric temperature shows that such events might occur more often with rising temperatures.  
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