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UID:20250819T190106EDT-5601U0uvhT@132.216.98.100
DTSTAMP:20250819T230106Z
DESCRIPTION:Dr. Brian Tang joins us from the Department of Atmospheric and 
 Environmental Sciences at Albany University for his seminar: Topographic a
 nd Boundary Influences on the 22 May 2014 Duanesburg\, New York\, Tornadic
  Unexpected Supercell. Refreshments will be served.\n\nAbstract\n\nThe 22 
 May 2014 Duanesburg\, New York (NY) supercell produced an EF-3 tornado and
  10 cm diameter hail. The synoptic setup for the event was subtle compared
  to other documented cases of Northeast tornadoes. Mesoscale inhomogeneiti
 es due to terrain and baroclinic boundaries played a key role in the evolu
 tion and severity of the storm. The storm initiated at the intersection of
  an outflow boundary and a north-south oriented baroclinic boundary. The m
 esocyclone was able to sustain itself due to sufficiently large amounts of
  low-level streamwise vorticity near the boundary despite subcritical valu
 es of 0-6 km vertical wind shear. Differential heating across the north-so
 uth oriented boundary strengthened the pressure gradient across it. Streng
 thening ageostrophic flow across the boundary induced greater upslope flow
  along the southeastern slope of the Adirondack Mountains and induced terr
 ain channeling up the Mohawk River Valley. The channeling led to a maximum
  in moisture flux convergence and instability in the Mohawk Valley. As the
  supercell descended into the Mohawk Valley\, radar and lightning data ind
 icated a rapid intensification of the storm. Cold temperatures aloft due t
 o the presence of an elevated mixed layer (EML) coincided with the surface
  instability to yield a local environment in the Mohawk Valley favorable f
 or extremely large hail. As the storm crossed the boundary\, large values 
 of 0--1 km wind shear\, streamwise vorticity\, and low lifting condensatio
 n levels combined to create a local environment favorable for tornadogenes
 is.\n
DTSTART:20151123T203000Z
DTEND:20151123T213000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Seminar: Dr. Brian Tang
URL:/meteo/channels/event/seminar-dr-brian-tang-256746
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