25 =========== Bill Whelan *AT* Frederick MD
One of the critical parameters I always look at.

30 =========== ---------- *AT* Mt. Diablo
Since Hcrit combines the first two, I use it more often.

38 =========== Daniel L Johnson *AT* KLUM, Menomonie, WI
Tends to be underestimated.

49 =========== ---------- *AT* Toronto ON & Clermont FL & State College PA
Second choice

50 =========== ---------- *AT* Van Sant Airport, Erwinna, PA
Usually can get above this height easily.

101 =========== ---------- *AT* Ellenville, NY
Seems to be underpredcited in the ETA.

108 =========== ---------- *AT* Santa Barbara, CA
Interesting, but not critical

126 =========== ---------- *AT* Hollister, CA
Hcrit seems to be more reliable than BL Top at predicting the height of the thermals. I stopped looking at BL Top.

132 =========== Bob Ireland *AT* Williams, CA
Occasionally - seems to work better in the Central Valley than over the Mendocinos

137 =========== Ramy *AT* Yanetz
Use with the RASP models only

145 =========== Martin Hellman *AT* Hayward, CA
Sometimes I use it, but mostly do not.

149 =========== ---------- *AT* Byron, CA -- Truckee, CA
this seems to be the most useful parameter, at least for determining whether a day will be soarable at Byron