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Vertical cross-sections of reflectivity
data can be constructed based on forecaster input. Forecasters
"cut" a cross-sectional line through a precipitation
entity or thunderstorm of interest. A software program within
the Radar
Products Generator (RPG) creates the chosen cross-section
based on various radar elevation scans through the entity, which
is then displayed for forecaster assessment. Cross-sections are extremely important in assessing
the vertical structure of thunderstorms. In the accompanying diagram of a
supercell storm, a deep layer of very heavy precipitation (red colors)
exists in the storm (up to above 40,000 ft). In addition, the
pink region inside the red area from 5000 to 35,000 ft indicates a deep
layer of large hail within the storm, suspended aloft by an
intense, rotating updraft. The echo top of the storm is over 50,000 ft,
while lighter precipitation is suspended aloft to the right of the most
intense portion of the storm. |
