Jérôme Kopp
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Double-moment normalization of hail size number distributions over Switzerland Open
Measurements of hailstone diameters and kinetic energy, collected by the Swiss network of automatic hail sensors, are available in three regions of Switzerland for the period between September 2018 and August 2023. In this study, we propos…
Verification of weather-radar-based hail metrics with crowdsourced observations from Switzerland Open
Remote hail detection and hail size estimation using weather radar observations has the advantage of wide spatial coverage and high spatial and temporal resolution. Switzerland's National Weather Service (MeteoSwiss) uses two radar-based h…
Reply on RC1 Open
Abstract. Remote hail detection and hail size estimation using weather radar observations has the advantage of wide spatial coverage and high spatial and temporal resolution. Switzerland National Weather Service (MeteoSwiss) uses two radar…
Reply on RC2 Open
Abstract. Remote hail detection and hail size estimation using weather radar observations has the advantage of wide spatial coverage and high spatial and temporal resolution. Switzerland National Weather Service (MeteoSwiss) uses two radar…
View article: Drone-based photogrammetry combined with deep learning to estimate hail size distributions and melting of hail on the ground
Drone-based photogrammetry combined with deep learning to estimate hail size distributions and melting of hail on the ground Open
Hail is a major threat associated with severe thunderstorms, and estimating the hail size is important for issuing warnings to the public. For the validation of existing operational, radar-derived hail estimates, ground-based observations …
Comment on amt-2024-2 Open
Abstract. Measurements of hailstone diameters and kinetic energy, collected by the Swiss network of automatic hail sensors, are available in three regions of Switzerland for the period between September 2018 and August 2023. In this study,…
Comment on egusphere-2024-729 Open
Abstract. Remote hail detection and hail size estimation using weather radar observations has the advantage of wide spatial coverage and high spatial and temporal resolution. Switzerland National Weather Service (MeteoSwiss) uses two radar…
A comprehensive verification of the weather radar-based hail metrics POH and MESHS and a recalibration of POH using dense crowdsourced observations from Switzerland Open
Remote hail detection and hail size estimation using weather radar observations has the advantage of wide spatial coverage and high spatial and temporal resolution. Switzerland National Weather Service (MeteoSwiss) uses two radar-based hai…
Double moment normalization of hail size number distributions over Switzerland Open
Measurements of hailstone diameters and kinetic energy, collected by the Swiss network of automatic hail sensors, are available in three regions of Switzerland for the period between September 2018 and August 2023. In this study, we propos…
Detecting Signatures of Convective Storm Events in GNSS‐SNR: Two Case Studies From Summer 2021 in Switzerland Open
Global Navigation Satellite Systems (GNSS) are not only a state‐of‐the‐art sensor for positioning and navigation applications but also a valuable tool for remote sensing. Through the usage of L‐band carrier frequencies, GNSS acts as an all…
View article: Comment on amt-2023-89
Comment on amt-2023-89 Open
Abstract. Hail is a major threat associated with severe thunderstorms and an estimation of the hail size is important for issuing warnings to the public. Operational radar products exist that estimate the size of the expected hail. For the…
View article: Drone-based photogrammetry combined with deep-learning to estimate hail size distributions and melting of hail on the ground
Drone-based photogrammetry combined with deep-learning to estimate hail size distributions and melting of hail on the ground Open
Hail is a major threat associated with severe thunderstorms and an estimation of the hail size is important for issuing warnings to the public. Operational radar products exist that estimate the size of the expected hail. For the verificat…
How observations from automatic hail sensors in Switzerland shed light on local hailfall duration and compare with hailpad measurements Open
Measuring the properties of hailstorms is a difficult task due to the rarity and mainly small spatial extent of the events. Especially, hail observations from ground-based time-recording instruments are scarce. We present the first study o…
GPS-SNR-based detection of severe weather events: two case studies of summer 2021 in Switzerland Open
Global Navigation Satellite Systems (GNSS) have become a valuable tool for remote sensing, as signals can be used for monitoring soil and snow properties as well as water vapor in the atmosphere. By using L-band carrier frequencies, GNSS a…
Reply on RC2 Open
Abstract. Measuring hailstorms is a difficult task due to the rarity and mainly small spatial extent of the events. Especially, hail observations from ground-based time-recording instruments are scarce. We present the first study of extend…
Reply on RC1 Open
Abstract. Measuring hailstorms is a difficult task due to the rarity and mainly small spatial extent of the events. Especially, hail observations from ground-based time-recording instruments are scarce. We present the first study of extend…
How observations from automatic hail sensors in Switzerland shed light on local hailfall duration and compare with hailpads measurements Open
Measuring hailstorms is a difficult task due to the rarity and mainly small spatial extent of the events. Especially, hail observations from ground-based time-recording instruments are scarce. We present the first study of extended field o…
Unique observational data from an automatic hail sensors network in Switzerland Open
We present an investigation of the first observations from the Swiss Hail Network Project, a network of 80 fully automatic hail sensors (Kopp et al., 2022) installed between 2018 and 2020 in the three most hail-prone regions of Switzerland…
View article: Drone-based hail observations and the retrieval of the hail size distribution after a supercell passage in summer 2021 in Switzerland
Drone-based hail observations and the retrieval of the hail size distribution after a supercell passage in summer 2021 in Switzerland Open
Hail is a major threat connected to severe thunderstorms and an estimation of the hail size is important to issue warnings for the public. Radar real-time products exist that estimate the size of the expected hail. For the verification of …
The summer 2021 Switzerland hailstorms: weather situation, major impacts and unique observational data Open
On 28 June and 8 July 2021, all the ingredients for severe convection were present and resulted in severe hailstorms over Switzerland, causing historic damage, as recorded by several insurance companies. The return periods of those events …
The summer 2021 Switzerland hailstorms: major impacts and unique observational data Open
From June 18 to July 31, 2021, a series of exceptional hailstorms occurred over Switzerland, causing major damages to buildings, cars, and crop fields. The available estimates from the insurance companies suggest that these events will be …
A novel method to identify sub-seasonal clustering episodes of extreme precipitation events and their contributions to large accumulation periods Open
Temporal (serial) clustering of extreme precipitation events on sub-seasonal timescales is a type of compound event. It can cause large precipitation accumulations and lead to floods. We present a novel, count-based procedure to identify e…
Dataset for "A novel method to identify sub-seasonal clustering episodes of extreme precipitation events and their contributions to large accumulation periods" Open
Dataset for "A novel method to identify sub-seasonal clustering episodes of extreme precipitation events and their contributions to large accumulation periods". Added file "Obs_metrics_all.RData" containing p-value for significance test of…
Dataset for "A novel method to identify sub-seasonal clustering episodes of extreme precipitation events and their contributions to large accumulation periods" Open
Dataset for "A novel method to identify sub-seasonal clustering episodes of extreme precipitation events and their contributions to large accumulation periods". Added file "Obs_metrics_all.RData" containing p-value for significance test of…
Reply on RC2 Open
Abstract. Temporal (serial) clustering of extreme precipitation events on sub-seasonal timescales is a type of compound event. It can cause large precipitation accumulations and lead to floods. We present a novel, count-based procedure to …
Reply on RC1 Open
Abstract. Temporal (serial) clustering of extreme precipitation events on sub-seasonal timescales is a type of compound event. It can cause large precipitation accumulations and lead to floods. We present a novel, count-based procedure to …
Comment on hess-2021-67 Open
Abstract. Temporal (serial) clustering of extreme precipitation events on sub-seasonal timescales is a type of compound event. It can cause large precipitation accumulations and lead to floods. We present a novel, count-based procedure to …