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National Weather Radar Facility
The CSU-CHILL National Weather Radar Facility, located in Greeley, CO, is an advanced, transportable dual-polarized dual-wavelength (S- and X-band) weather radar system. The facility is operated by Colorado State University, under the sponsorship of the National Science Foundation and the University.

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1jul2015 2112 solo 2panel insect anot.png

CSU-CHILL S-band data from a 1.5 deg elevation angle PPI scan in the afternoon hours of 1 July 2015. The drops in a small rain shower have differential reflectivity (Zdr) levels of 2 - 3 dB. Much more positive (approximately +9 dB) Zdr values occur in the surrounding boundary layer echo where the targets are primarily insects. Time lapse loops showing the evolution of the low-level Zh and Zdr fields have been prepared. (Full Article...)

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Radial velocity vectors in an RHI scan of a thunderstorm. Radial velocity vectors in an RHI scan of a thunderstorm.

Earth-relative radial velocity vectors imply strong, divergent flow in the downstream anvil region of a thunderstorm. Mid-level convergence exists in the nearer-range side of the echo core. (CSU-CHILL S-band data.)

Photo credit: Patrick Kennedy
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