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View Full Version : "conditional language" in a TAF

12-23-2015, 07:57 AM
I am trying to comprehend an OpSpec that says "All conditional forecast elements below the lowest applicable operating minimums must be taken into account."

While I can assume this means anything in a TAF below mins counts in disqualifying an airfield, I cannot take the leap from assumption to absolute certainty without understanding factually the definition of "conditional forecast elements".

Google and searching here yielded a few nebulous answers half-answers:

TEMPO in WX forecast? - PPRuNe Forums ( This document mentions "conditional language".

But, what is the actual definition of "conditional language" and what would be an example of such? I just haven't found any official government documents that define conditional language or provide examples in a TAF.

Thanks guys.

12-23-2015, 09:28 AM
Any portion which contains "PROB" or "TEMPO."

Twin Wasp
12-23-2015, 09:29 AM
Don't over analyze it.

12-23-2015, 09:03 PM
Then there's the practice of companies that note weather forecast below minimums, but purchase a "RAMTAF" showing vastly improved weather, and substitute that in the flight packet to show forecast weather well above minimums. That doesn't happen, does it?

Twin Wasp
12-23-2015, 11:15 PM
Of course not! Or to look at it another way, you can get the best weather money can buy.

12-24-2015, 06:20 AM
Which is interesting because they use the word "conditional" fit everything in to a small tidy box. But if everybody just called it "temp. & prob. Language" it would actually be fewer syllables and would never need to be explained again. Sometimes the cure is worse than the disease.