example of low-level thermodynamic environment that may support non-mesocyclone tornadoes:

^Several non-mesocyclone tornadoes along a well-defined NE-SW boundary were associated with this estimated profile.

Note here the very steep lapse rate in the bottom 2 km that approximates the dry-adiabatic lapse rate as a result of strong afternoon heating in low-levels.  While this is not unusual in late spring and summer, it is less common to find combined with this lapse rate a fairly deep moist layer that exhibits a relatively low LFC (below 2200 m, using a mean-layer parcel) located not far above the LCL (resulting in minimal CIN).  Theoretically, this should allow parcels with developing storms along a well-defined convergence boundary to rise/stretch rapidly in the bottom 2-3 km, without excessive entrainment and "mixing-out".