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Figure 1: The radar reflectivity image at 00:42 UTC 16 June 2002 depicts a squall line with
a trailing stratiform region with a bright band (melting layer).
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Figure 2: The differential reflectivity at 00:42 UTC 16 June 2002 depicts
medium-sized drops along the leading edge of the squall line, with
a mix of hydrometeors within the bright band (melting layer). The region of near-zero
ZDRS directly behind the convective line likely represents ice particles carried
toward the rear of the system. In addition, hail is indicated near the western end
of the convective line by a patch of low ZDR, surrounded by higher ZDRs.
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Figure 3: High correlation coeffiecients along the leading edge of the squall line depict
rainfall, whereas lower corrleation coefficients (0.9-0.93) within the bright band indicate a mix of hydrometeors,
including hail. The data appear attenuated behind the strong cell on the western end of the
line.
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Figure 4: The hydrometeor classification algorithm identifies convective cells (brown) along
the leading edge of stratiform precipitation (orange). Hail is found within the strong cell
on the western end of the line (red).
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Figure 5: The differential phase shows the greatest accumulated change in phase (degrees)
along radials where the hydrometeor type varies with increasing range.
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Figure 6: The specific differential phase, which is linearly related to rainfall, indicates
heavy rain rates along the leading edge of the squall line, very light rain in the downdraft region
behind the center of the line, and moderate rain in the vicinity of the bright band.
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