Thread about WX website of temp/DW spread??

[PAPA FOX!]

A few weeks ago there was a thread started about something related to WX and someone posted a website that shows temp and DP spread as altitude increases. This supposedly is a good tool for determining the tops of clouds. I did a search and can't find it. If anyone can post the like I'd appreciate it.

 

[mattpilot]

the dry adiabatic lapse rate is 5.4 d F and the dewpoint decreases at a constant 1 d F per 1000ft.


So 5.4 - 1.0 = 4.4 d F lapse rate to find cloud bases.


Say the dewpoint spread is 20 d F, then expect a cloud layer at roughly 4,500 ft + field elevation = FT MSL.

 

[PAPA FOX!]

Actually it was a temp/DP DIVERSION that would usually give a good estimate of what the TOPS of the clouds were. If I remember correctly it showed two lines very close together that diverged at the tops of the clouds. Again if anyone can bring up the thread or the webite itself I'd appreciate it!

 

[mattpilot]

i don't believe there is some reliable formula that would let you predict the TOP of clouds, since the saturated adiabatic lapse rate is variable.

 

[JediNein]

You're looking for a Stuve Diagram. Try http://dstreme.comet.ucar.edu/stuve.html
and
http://vortex.plymouth.edu/uacalplt.html (usually not working, try http://weather.cod.edu/analysis/analysis.raob.html instead)

Fly SAFE!
Jedi Nein

 

[T-REX]

You're looking for a Stuve Diagram. Try http://dstreme.comet.ucar.edu/stuve.html
and
http://vortex.plymouth.edu/uacalplt.html (usually not working, try http://weather.cod.edu/analysis/analysis.raob.html instead)

Fly SAFE!
Jedi Nein

afirm. http://forums.flightinfo.com/showthread.php?t=63222&highlight=caravan


I believe data is still experimental so don't sue me if you become a popsicle. Have a good weekend. Go Bears.