Articles | Volume 20, issue 6
https://doi.org/10.5194/hess-20-2317-2016
https://doi.org/10.5194/hess-20-2317-2016
Research article
 | 
15 Jun 2016
Research article |  | 15 Jun 2016

A radar-based regional extreme rainfall analysis to derive the thresholds for a novel automatic alert system in Switzerland

Luca Panziera, Marco Gabella, Stefano Zanini, Alessandro Hering, Urs Germann, and Alexis Berne

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Cited articles

Alfieri, L., Velasco, D., and Thielen, J.: Flash flood detection through a multi-stage probabilistic warning system for heavy precipitation events, Adv. Geosci., 29, 69–75, https://doi.org/10.5194/adgeo-29-69-2011, 2011.
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Allen, R. J. and DeGaetano, A. T.: Considerations for the use of radar-derived precipitation-estimates in determining return intervals for extreme areal precipitation amounts., J. Hydrol., 315, 203–219, 2005.
Atencia, A., Rigo, T., Sairouni, A., Moré, J., Bech, J., Vilaclara, E., Cunillera, J., Llasat, M. C., and Garrote, L.: Improving QPF by blending techniques at the Meteorological Service of Catalonia, Nat. Hazards Earth Syst. Sci., 10, 1443–1455, https://doi.org/10.5194/nhess-10-1443-2010, 2010.
Barton, Y., Giannakaki, P., von Waldow, H., Chevalier, C., Pfahl, S., and Martius, O.: Clustering of regional-scale extreme precipitation events in Southern Switzerland., Mon. Weather Rev., 144, 347–369, 2016.
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Short summary
This paper presents a novel system to issue heavy rainfall alerts for predefined geographical regions by evaluating the sum of precipitation fallen in the immediate past and expected in the near future. In order to objectively define the thresholds for the alerts, an extreme rainfall analysis for the 159 regions used for official warnings in Switzerland was developed. It is shown that the system has additional lead time with respect to thunderstorm tracking tools targeted for convective storms.