[gradsusr] Cloud Base Height

[Kurt Mayer]

Trying to get the cloud base height to display.  My WRF output contains...

553:6102198:D=2010040706:HGT:cld base:kpds=7,2,0:1hr fcst:winds in grid
direction:"Geopotential height [gpm]
554:6118206:D=2010040706:HGT:cloud ceiling:kpds=7,215,0:1hr fcst:winds in
grid direction:"Geopotential height [gpm]

I have this in my grads script...
'define ceiling=(HGTsfc(t='dis_t')*3.2808399)'
'd ceiling'

Which gives me a topo map in feet.  I am guessing I just have to make a
simple change to the above to give me ceilings/cloud bases.  Anyone know
what that simple change is?  thanks.
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