Abstract
Abstract The precipitation and structure of a hail-producing region embedded within a severe squall line are investigated by combining data simultaneously measured by vertically pointing and volume-scanning Doppler radar. These data are complemented by surface measurements made, at the location of the vertically pointing radar, with a Joss–Waldvogel disdrometer. The vertically pointing radar measured the standard radar data fields (Z, υυ, συ) and the power spectrum of the vertical Doppler velocities. Once the timescale is converted to a spatial scale, based on an estimate of the propagation speed and direction of the storm, the horizontal resolution of the data is less than ∼100 m for Z, υυ, and συ, and less than ∼200 m for power spectra. Spatial resolution in the vertical direction is 250 m for the Z, υυ, συ data and 2.25 km for the power spectra data. The vertical scan measurements were made directly within the weak echo region associated with the hailfall observed at the radar site. These high-resoluti...
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