Cloud cover measured in OKTAs

[Mauricio_S]

Hi, i'm from Chile and i have been working with wrfout, i see the influence of climate change on pavement design and i need some weather variables for it, as for example cloud clover (measured in OKTA, from 1 to 8,
on this page explain the variable that I need http://en.wikipedia.org/wiki/Okta).
I was able only to find the variable CLDFRA which just gives me values 1 and 0, that does not help me.
Can anyone tell me if I can get the variable that I need (cloud cover or something)? i would be very thankful for it!!

another thing with i have problems is the vertical levels, in the configuration 45 vertical levels were used, but i don't know wich is wich (meters).

[meteoadriatic]

Do you postprocess wrfout into grib format or you absolutely have requirement to work with wfrout directly?

[Mauricio_S]

Do you postprocess wrfout into grib format or you absolutely have requirement to work with wfrout directly?

grib format (190 horizontal x 70 vertical, and 45 vertical lvls)

[meteoadriatic]

In grib cloud cover should be in percents. Which software do you use to read grib files?

[Mauricio_S]

In grib cloud cover should be in percents. Which software do you use to read grib files?

NCL
what is the name of "cloud cover"? (like...cloud fraction->"CLDFRA")