Subtropical jet processes

[Pinwheeler]

Here is an RUC model analysis of 300mb heights and temperatures contoured every 1 degree C. This is the level where the subtropical front is (not evident at the surface). You can see the warm advection in the Carolinas with cold advection farther west. The warm advection is associated with lifting. Since the speeds are so fast there is a lot of advection of every property. This is one reason why the lifting can be persistently strong even when the 500mb vorticity max / vorticity advection is not really right where the main cloud/precipitation generation is (this morning the 500mb vorticity max was in Arkansas coming in from the back side but the precipitation was in North Carolina)

http://cyclone.plymouth.edu/cgi-bin/gen_grbcalc.cgi?re=us&mo=ruc&le=300&va=temp&in=1&pl=cf&ft=h00&cu=previous&overlay=yes&mo=ruc&le=300&va=hght&in=60&pl=ln&ft=h00&cu=previous

[Pinwheeler]

Here is a link to the RUC vertical velocity at 300mb

http://cyclone.plymouth.edu/cgi-bin/gen_grbcalc.cgi?re=us&mo=ruc1&le=300&va=vvel&in=1&pl=cf&ft=h00&cu=previous&overlay=yes&mo=ruc&le=300&va=hght&in=60&pl=ln&ft=h00&cu=previous