Similar to the 1994 maximum tornado, but with uniform viscosity and a bigger domain. The domain extends to a radius of 4 and a height of 2. 
Time history of maximum in w and v, and minimum in
u and p. 
Time history of the big spikeHere is the big spike that "went off the scale". The integration was repeated with a 3rd order advection scheme (dashed), instead of the 5th order scheme (solid), to give some indication of the robustness of the numerical solution. 
Animation from t=165 to t=175, with Δt=0.1
