Characteristics of hail hazard in South Africa based on satellite detection of convective storms
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Published:2023-04-26
Issue:4
Volume:23
Page:1549-1576
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ISSN:1684-9981
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Container-title:Natural Hazards and Earth System Sciences
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language:en
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Short-container-title:Nat. Hazards Earth Syst. Sci.
Author:
Punge Heinz Jürgen, Bedka Kristopher M.ORCID, Kunz MichaelORCID, Bang Sarah D., Itterly Kyle F.
Abstract
Abstract. Accurate estimates of hail risk to exposed assets, such as crops, infrastructure, and vehicles, are required for both insurance pricing and preventive measures. Here we present an event catalog to describe the hail hazard in South Africa guided by 14 years of geostationary satellite observations of convective storms. Overshooting cloud tops have been detected, grouped, and tracked to describe the spatiotemporal extent of potential hail events. It is found that hail events concentrate mainly in the southeast of the country, along the Highveld, and around the eastern slopes. Events are most frequent from mid-November through February and peak in the afternoon, between 13:00 and 17:00 UTC. Multivariate stochastic modeling of event properties yields an event catalog spanning 25 000 years, aiming to estimate, in combination with vulnerability and exposure data, hail risk for return periods of 200 years.
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences
Reference90 articles.
1. Adler, R. F., Markus, M. J., and Fenn, D. D.: Detection of Severe Midwest
Thunderstorms Using Geosynchronous Satellite Data, Mon. Weather Rev., 113,
769–781, https://doi.org/10.1175/1520-0493(1985)113<0769:DOSMTU>2.0.CO;2, 1985. a 2. Admirat, P., Goyer, G. G., Wojtiw, L., Carte, E. A., Roos, D., and Lozowki, E. P.: A comparative study of hailstorms in Switzerland, Canada and South Africa, J. Climate, 5, 35–51, https://doi.org/10.1002/joc.3370050104, 1985. a, b 3. Allen, J. T., Tippett, M. K., and Sobel, A. H.: An empirical model relating
U.S. monthly hail occurrence to large-scale meteorological environment, J.
Adv. Model. Earth Syt., 7, 226–243, https://doi.org/10.1002/2014MS000397, 2015. a, b 4. Allen, J. T., Giammanco, I. M., Kumjian, M. R., Punge, H. J., Zhang, Q.,
Groenemeijer, P., Kunz, M., and Ortega, K.: Undertanding Hail in the Earth
System, Rev. Geophys., 58, e2019RG000665, https://doi.org/10.1029/2019RG000665, 2020. a, b, c 5. Ayob, N.: Hail nowcasting over the South African Highveld, MS thesis, North-West University, South Africa, https://repository.nwu.ac.za/handle/10394/33836 (last access: 21 April 2023), 2019. a
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