Hello,

 

I have been using OPUS for quite some time now and I have been really happy with it.  However, at some point recently the weather engine has stopped show upper and lower atmosphere weather reports and the winds aloft are completely wrong.  Right now I am flying east over the southern United States at FL330 and I am getting winds at 060 40kt.  Well that's pretty much the exact opposite of the current conditions in that area at that altitude.  I have only recently been having this problem; before the winds aloft were always satisfactory.  I am using the current release version in FSX Acceleration.

Please read the Using The Live Weather Engine and especially the Recommended Practices section in our SimForums.

 

If you do not have the Upper or Lower weather reports then you do NOT have any GRIB forecast data and therefore the LWE is using Simulated upper winds and temperatures. This would have been noticed immediately if the weather and lower/upper winds were checked always before flight. Note, you now have to display these reports maually, the Upper report will no longer be displayed automatically during a GRIB data download.

 

Just do the usual things ...

 

Before flight whilst on the ground ...

 

Open the main Spy window and display the Upper Weather report on the screen

Set all weather defaults in all weather dialogs

Specify your Destination and Max Cruise Altitude

Force a weather update

Follow the weather download and progress in the Spy window and in the Upper report

Any GRIB processing error then check your c:\OpusFSX\FSDECODER.log

Send the log to me or show the relevant entries here.

Check the FAQs for what to do in the event of GRIB download or decoding problems.

 

Usually people have not uninstalled before upgrading the software and their FSDECODER.EXE program does not match the rest of the build, or they have write protected some of the GRIB data files etc..

 

Stephen :smile:

If you are using the sim in accelerated time then of course as detailed in the docs you MUST have FSUIPC4 installed so that the LWE can take the sim out of accelerated time, back into x1 sim rate, perform the weather update, then restore the previous accelerated sim rate.

 

FSX cannot load weather correctly, especially upper wind and temp targets, when in accelerated time.

 

Also, never disable weather updates as FSX will eventually drift away from any targets and eventually ignore them entirely.

 

All the usual stuff in Recommended Practices really.

 

Stephen

Thank you for the reply!  I figured it out shortly after posting this.  It was the stabilized GRIB data box I had accidentally checked.

Oh. That would have certainly explained it and saved my reply.

 

Stephen

Sorry if I had realized it had fixed the problem, I would have saved you the trouble of making the post. 

No problem, glad you got it sorted.

 

Stephen

It was indeed a very useful reply for me. I experienced the same problem of sudden strong back winds (50knts) on an western track over the atlantic ocean (close to 51N40W) and stabilised GRIB datas were unchecked. It came back to normal headwinds one hour later. BTW, this has shortened my flight from Paris to New York by a few minutes B) . I will apply the recommandations on the ground next time and see if it works.