Regression - sim is mixing live weather with historical weather again (was previously fixed in SU2)

utd4life12 · May 21, 2025, 7:32pm

ISSUE DESCRIPTION

Description of the issue: In SU2 a fix was deployed that fixed the issue of live weather data incorrectly mixing with historical data and 2 models apparently fighting each other. This bug has been re-introduced in SU3 and Live weather again seems to be mixing with incorrect/historical data when it should not be.

Did you experience this issue before you joined the Beta? No

Provide specific location or coordinates: UK/Europe. EGNX for example at time 1930UTC, shows lots of cloud over East Midlands and all over central UK in general, this was how the weather was approximately -24 hours, where as tonight is should be largely clear skies.

Provide time and date of the observed weather issue: 21.MAY.2025 ~ 1930UTC

[PC Only] Did you remove all your community mods/add-ons? If yes, are you still experiencing the issue?

FREQUENCY OF ISSUE - seems more prominent after 1800UTC

How often does this occur for you (Example: Just once, every time on sim load, intermittently)?

REPRODUCTION STEPS

Please list clear steps you took in order to help our test team reproduce the same issue:

Load up with Live weather in UK/Europe after 1800UTC
Observe live weather mixing with historical data

YOUR SETTINGS

If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the User Support Hub.

What peripherals are you using, if relevant:

[PC Only] Are you using Developer Mode or have you made any changes to it?

[PC Only] Many issues may be due to an outdated graphics card. Please state your Graphics Card Driver Manufacturer (NVIDIA, Intel, AMD) and Version:

[PC Only] What other relevant PC specs can you share?

MEDIA

Please add a screenshot or video of the issue occurring.

Observe all the cloud cover over the UK in MSFS 2024 SU3 BETA:

Compared to actual cloud cover:

[END OF FIRST USER REPORT]

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Do you have the same issue if you follow the OP’s steps to reproduce it?
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utd4life12 · May 24, 2025, 10:23pm

EGCC real life: EGCC 242150Z AUTO 21010KT 160V230 9999 BKN017/// //////CB 15/12 Q1004 TEMPO BKN014

EGCC MSFS 2024 Live weather bug:

You can see the data is bugged and mixing with old data or something, hence all the missing cloud cover

Eefoe · June 7, 2025, 3:40pm

I concur. Flying in southeast asia on SU3, I’m seeing a lot of discrepancies.

utd4life12 · June 7, 2025, 5:23pm

Yes, this bug is still present in SU3 beta.

utd4life12 · June 7, 2025, 7:41pm

Is there any chance the devs could take a look at this?

dectenor1 · June 8, 2025, 1:54am

Yep, something definitely weird going on with live weather.

utd4life12 · June 8, 2025, 5:44am

Yeah, I really hope they look at this as it got to a really good state with the patches they released in SU2 beta but something seems to have gone wrong again.

utd4life12 · June 12, 2025, 5:34pm

Another example now of this bug, at LEMD:

Forecast, METAR, Satellite etc all call for clear skies:

MSFS has heavy cloud:

utd4life12 · June 16, 2025, 8:45pm

Still happening in the latest BETA, something for the UK especially goes wrong from 1900UTC and the data becomes wrong, chunks of clouds get removed and in other locations of the UK cloud is injected where it shouldn’t be.

utd4life12 · June 19, 2025, 9:08am

19th June:

UK covered in cloud:

Should be clear skies:

Mixiing with historial/incorrect data

dustNinja7871 · June 29, 2025, 5:58pm

I’m not in SU3B, but i see that it’s back to the live version of the sim (SU2), the weather will often show the old cached (i guess?) wx data, so seems like a server side thing really. I hope they are aware, because it needs to some tinkering again.

utd4life12 · June 29, 2025, 6:50pm

I hope so too, but it’s not even feedback or bug logged, so I doubt it’ll get the attention it deserves.

Jummivana · July 16, 2025, 5:15pm

Thank you for the bug report.

We have created an internal ticket to see if our team already has this logged, and if not they will attempt to reproduce the issue and create a new bug report. This item is now marked as feedback-logged. If there is an existing bug report or one is created, we will move this thread to bug-logged.