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- W1638503852 abstract "Local flash flood storms with a very rapid hydro- logical response are the real challenge of precipitation fore- casting. It is relevant to assess the space dimensions, where the QPF results are applicable to the forecasting and/or warn- ing. In this paper we attempt to express the forecasting ca- pability of a high-resolution NWP model by means of area- related radar verification. The presented results concern the local convective event on 13 July 2002, which occurred in the Czech Republic and caused a local flash flooding. The 18 h forecast gave rainfalls in the horizontal resolution of 2.8 km. Verification made use of corresponding radar rainfall totals adjusted to the rain gauge data. Grid point-related RMSE value was calculated over a square around the grid point; the calculation was based on the assumption that the rainfall val- ues were randomly distributed inside the square. The mean RMSE characterized the forecast accuracy over the whole verification domain. In this paper we show the dependence of the RMSE field as well as of the mean RMSE on the square size. a real challenge of precipitation forecasting. It is relevant to assess the time and space dimensions, where the QPF re- sults are applicable to the forecasting and/or warning. In this paper we present first results of an attempt to assess the fore- cast ability of a high-resolution NWP model by means of new area-related radar verification. The results are related to the event on 13 July 2002, and a similar analysis of the storm on 15 July is under way. The LM code, provided to the IAP (Institute of Atmospheric Physics) by the DWD (German Weather Service) for research, was used in an experimen- tal two-step configuration in order to assess the model ability to predict precipitation amounts, sites and timing of rainfall. The predicted rainfalls were compared with the radar rainfall totals adjusted to the rain gauge data. The aim of analysis is to examine the LM results in dependence on the area size. The area surrounding a grid point is considered and the area size is related to the accuracy of the precipitation forecast." @default.
- W1638503852 created "2016-06-24" @default.
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- W1638503852 date "2004-01-01" @default.
- W1638503852 modified "2023-09-27" @default.
- W1638503852 title "Radar verification approach to the QPF for local flash flood storms" @default.
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