Casebook 23 April 2003
From CSU-CHILL
CSU-CHILL Casebook: 23 April, 2003
On this date a strong synoptic scale short wave affected northeastern Colorado; widespread rain showers and thunderstorms developed by mid-day local time. By early afternoon, one area of echo development was located over the CSU-CHILL radar site. The radial velocity pattern seen in the low elevation PPI scans implied that confluent flow was present in the immediate vicinity of the radar. The VCHILL link below shows the radial velocity configuration at 1927 UTC. Negative (inbound) radial velocity components exist around the majority (~250 degrees) of the 15 km range ring. This is a departure from the symmetric sine wave radial velocity that is observed in PPI scans through horizontally uniform wind fields.
