Corresponding author address: Harold E. Brooks, National Severe Storms Laboratory, 1313 Halley Circle, Norman, OK 73069 e-mail:

[1] We note in passing that a large value of CAPE implies a great deal of information about the humidity profile in the atmosphere. High CAPE requires steep lapse rates in the low-to-mid-troposphere, implying dry air at those levels, with high absolute humidity at low levels, so that the parcel is lifted along a very warm pseudo-adiabat.

[2] We are also aware of similar storms occurring in Australia. A possible example has been described by Eyre (1992).