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CAVOK and cloud

Posted: Thu Feb 23, 2012 4:00 pm
by Smith88
Hi Pasha,

First of all, I would like to congratulate on the development of YoWindow3. It's great. :) Today, I have completed the Hungarian translation.

After the official release and if you have time for it, would you consider my suggestion mentioned below?

YoWindow shows the current weather by the METAR reports. It doesn't contain the information of cloud if there are not any cloud below a specific height (usually 1500-2500 m). Now, it's overcast here, but YoWindow shows clear, because there is CAVOK in METAR (no cloud below 1500 m).
I have considered that the observed cloud cover can be replace with forecast data when there is CAVOK or NSC (it's the same, but visibility is less than 10 km) in the latest METAR. Now it would be good here, because yr.no shows cloudy.
I think it would be more acceptable if YoWindow showed partly cloudy when forecast is partly cloudy (Image) and YoWindow showed mostly cloudy when forecast is cloudy (Image). If the forecast was fair (Image or Image) YoWindow would show clear or fair. For a few hours beforehand, the forecast is quite accurate to replace the observation.

I hope it is not too confused what I have written. Can it be solvable or it is too complicated? It could be an option in the program, like "NWS forecasts in USA".

What do you think? Other YoWindow users? :)

Adrian

Re: CAVOK and cloud

Posted: Fri Feb 24, 2012 6:53 am
by par
Hey, Adrian!

Thanks for your hard work with Hungarian translation.

I was thinking that CAVOC is the same as Clear.
Thank you for letting me know that this is not always true.

As far as I understand you want YoWindow to replace current sky condition with the closest weather forecast if METAR reports CAVOC or NSC.

I'm sorry, but this is too much complicated now.
This problem looks similar to snow cover detection.
This is not reliable technique.

And I'm afraid to lose a lot of my time trying to make it right.

This is certainly not a candidate for yo3 feature.

But I hope some day we will find a nice solution to the problem.
At least now I am aware about CAVOC secret.