Abstract
A severe thunderstorm which formed in an environment not usually associated with severe weather split into right- and left-moving parts near Verden, Oklahoma, on 1 May 1977. The right-moving storm developed a mesocyclone signature and produced large hail. The storm's life is described from data from the NSSL single-Doppler radar, conventional radar, surface mesonetwork, and from intercept observations. The storm-split process and the evolution of couplets of vorticity are, highlighted. This is the first single-Doppler documentation of a splitting storm from first echo. Evidence was found of two separate organized updrafts and two mirror-image cyclonic/anticyclonic couplets 30 min before the low-level radar echo split. We conclude that a downdraft may have formed in between the updrafts, and that the storms behaved like the one simulated by Wilhelmson and Klemp (1978).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
