("john smith" wrote)
I just pulled up the cloud tops charts and see one labeled FL720 over SE
Nebraska/NE Oklahoma/SW Missouri. Is this for real?


Is there a link to any PIREPS that reported them building?

I Google and got references to 55-60K and also got a few 70K "cloud top"
hits - mostly relating to tropical storms.

More than one site said they figure a 5K error acceptable with
satellite/radar imaging - maybe that means (+/-) 2.5K feet. So you're maybe
only talking 70K, now. :-)


Montblack