19 =========== Jack Harkin *AT* Jean NV (Las Vegas)
extremely useful

25 =========== Bill Whelan *AT* Frederick MD
Look at when T-storms are possible.

38 =========== Daniel L Johnson *AT* KLUM, Menomonie, WI
Actually, I look at this before IFR airplane flights...

45 =========== Milton Hare *AT* Williams, CA
Critical when thunderstorms are possible. Very important for safe flying and deciding when you need to be back at home to be sure you don't get cut off by storms. Why doesn't this how up on BLIPSPOT?

81 =========== Bob Gibbons *AT* Texas Soaring Association (TSA), Dallas, TX
Same as OD Potential, used in the summer

101 =========== ---------- *AT* Ellenville, NY
We don't fly on thunderstorm days so why even bother with this?

132 =========== Bob Ireland *AT* Williams, CA

141 =========== ---------- *AT* Highland Aerosports / Ridgely MD - Quest Air / Groveland FL

147 =========== Rolf Beyer *AT* Harris Hill, Elmira, NY
I really have not studied this parameter