Live Weather Does Not Match

Same here regarding highly varied weather compared to METARS/forecasts.

Yesterday flight to Wellington NZ, pressure difference by only 0.01 inches, wind direction and speed very similar to METAR, OAT off by a couple of degrees. Also wind and temp aloft comparable to windy.com GFS forecast.

If it could be like this in all situations, that’s good enough for me. Unfortunately it isn’t.

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Dear meteorology enthusiasts (what a wording :sweat_smile:)

Meteoblue as the known data provider for MSFS has an own weather model map:

From my point of view it makes sense to compare the MSFS weather with this source instead of Windy. Then we should distinguish two points:

  1. Accuracy of the Meteoblue weather model itself (compared to METAR and real weather observations);
  2. Accuracy of injection to MSFS.

Example: If METAR reports wind 250/15, Meteoblue says 210/8 and MSFS shows 210/8 we are not discussing an MSFS bug but the overall data model of Meteoblue.

I believe this helps giving the issue tracking a bit more structure :slightly_smiling_face:

Cheers,

Stefan

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Hi Stefan,

This is of course true. However, please consider that MS/Asobo are claiming to also use METAR reports for their live weather:

We use METAR reports and Meteoblue weather forecasts to represent the live weather experienced in the sim. They are updated at regular intervals, but they can lack precision. Most of the time they will match but sometimes, they will not.

So we can’t simply compare Meteoblue data with what we see in the sim. And on a different note: Sometimes the weather in the sim deviates so drastically from the real-world conditions, that I don’t even have to check Meteoblue to know something can’t be right… :wink:

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Meteoblue actually has it’s own METAR reports somewhere on their weather map configurations. Maybe it’s in reference to those. This would mean that the direct comparison still can be done only to Meteblue’s own data versus what is shown in the sim.

How many data sources for METAR reports do you think are there? Do you believe people at Meteoblue create their own METAR reports?

When MS/Asobo claim to use “METAR reports” to be part of their live-weather representation, it’s just that. The METAR reports. The METAR reports.

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I have the same issue. Flying around Northern Australia within 50nm of Darwin (YPDN). Same deal, 1st flight ok, after returning to main menu nothing - back to 225/3 and clear skies.
I have had limited success setting AI and Mp aircraft to default textures, where sometimes 2nd flight is ok. But at best it is still hit and miss

Go to their website, open the weather map and select METAR as option on the right side.
You can check if those data match other reports and if the data MB has in their METAR section is as comprehensive as other.

Which “other reports” are you talking about? There’s only one—and one only—report for a given station at a given point in time.

Stop the lightning! Are you proud of making lightning? Asobo lightning company?

fix??? REcheck!!! fukme lightniing

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Here’s the catch though; I’m looking through Meteoblue trying to figure out what the live precipitation is, but the way precipitation is shown is utter garbage compared to other websites which show live weather radar data graphically.

I think precipitation data is the most accurate way to determine how “live” the MSFS weather is, but even then I’m looking at the data and have no idea how to make sense of it: The number on the map says “1.0” so does that mean there’s 1mm of precipitation exactly at that point or nearby? Or 1mm in the past 24 hours? How do you determine the shape and intensity of the precipitation?

Like, I like the idea of Meteoblue weather injection, but there’s just not enough transparency to allow us users to debug what’s going on with the weather…

But Meteoblue only takes so and so much data from the weather stations and publish it under their METAR function. If Asobo then says they are taking METAR reports into account, it could very well be that they take what Meteoblue provides and not all weather services which publish the METAR data, publish every piece of information. That’s why I said, that you could go on their website and take a look for yourself.

KTEX this morning (local time).

Game: 30 C, A30.29
RW: 13 C, A30.52

It got the clear skies correctly, though :ok_hand:t2:

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Quite a long post coming in: I just compared for some US airports (KTEX, KASE, KSEZ, KLAX, KSEA, KJFK) and a European airport (EDDF for comparison) the METAR data (source for US: NOAA) to the Meteoblue website (I used the 7-day forecast page as it also shows pressure and used the time that was closest to the current local time) and the actual ingame weather. Here are the findings (only looked at wind, temperature and pressure):

Temperature: same thing as you, at KTEX current METAR and Meteoblue both say 22°C, ingame 34°C. Interestingly, the automated weather report states 14°C ingame!

So there is definitely a bug that the actual OAT displayed on the PFD does not match the ingame ATIS value. This seems to be altitude dependent. KSEZ had the same problem for me, 20°C on the ATIS but 34°C on the PDF. It almost looks like the value on the PFD is the one one would get at sea level, assuming a standard atmosphere temperature gradient. At airports close to sea level, this problem does not occur. Now, the question is, is just the PFD value just incorrect (had it on both the G1000 C172 and the TBM), or is the actual temperature in the sim incorrect (i.e., not equal to the ATIS value)?

Also, the 14°C would not be close to Meteoblue website or METAR data either. But wait, it’s the middle of day in KTEX and in the morning it had to have been colder up there. So maybe there is just a giant time delay and the sim takes the weather from about 6 hours or more earlier? That’s a big gap though, maybe it’s a problem with time zones and the data pulled from Meteoblue belongs to the wrong timestamp? All US airports had lower temperatures than the Meteoblue website (which always exactly matched METAR) indicated. EDDF temp worked perfectly.

Wind: Generally seemed to be reasonably okay, but there were also some indications (where wind direction changed during the day) that the theory of several-hours-old data might still hold.

Pressure: The Meteoblue pressure (the page only shows a number, independent of daytime, and that one also seems to be close to what’s in the sim) was reasonably close to the METARs at sea level. Only at the high elevation airports I checked (KTEX, KASE, KSEZ) there was a big discrepancy, e.g. 30.49 in METAR and 30.18 on the Meteoblue website. So this is not a sim issue, the Meteoblue pressure data is just not very exact. At EDDF, the Meteoblue website perfectly matched the METAR, but the ingame pressure did not. Upon checking a second time (it’s past midnight now in Frankfurt) the pressure had updated on the Meteoblue website with a quite drastic change (29.65 to now 29.88) and the later value was roughly what I was seeing in the sim. METAR still shows the old value, so I guess it will change towards the new, predicted one gradually during the day.

Since we’re fed model data in the sim, it makes sense to take a look at the forecast models on the Meteoblue website. Generally, if you compare the “Multimodel” views, you’ll find that there are just a bunch more models used in Europe than in, e.g., the USA:

The data of the different models also seems to diverge a lot less at EDDF than at KLAX (your mileage may vary, as you’ll look at it at it at a different time). At the bottom of those pages, you get an overview of the model coverage (there seems to be worldwide coverage at a 30km resolution outside the boxed regions and more detailed coverage with different models in the boxes). Of course, I’m not sure if that’s anything similar to the data we get in the sim as it’s forecast. And that doesn’t mean that US coverage is bad, not at all. But I’d guess that you’ll be more likely than in Europe to see some deviations like in the pressure at high altitudes. So all in all, the actual Meteoblue data looks decent to me, only the pressure could be worked on; the odd temperature bug and the possible time delay need to be resolved though.

Maybe some more of you guys could look into it and check if you have the same issues, i.e. different ATIS and PFD temperatures at high elevation fields? There is already a lot of discussion going on about the data being live or not, maybe it can be related to different parts of the world, possibly even timezones, or is it a constant offset? EDDF seemed pretty spot on.

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Hi,

thanks for sharing your detailed analysis.

As always there’s too many forum topics for the same issue. Anyway I recommend reading what I just posted in a different topic:

Maybe this also helps explaining your observations.

Cheers,

Stefan

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Your explanation @sfdeham doesn’t take into account such huge discrepancies @MeteorKorbat is describing, but maybe also contributes to the problem. Data quality, update frequency, data extrapolation and weather smoothing between two updates are the first things I would’ve clarified before even starting to work on the weather engine.

It’s really mind boggling why we’re trying to find answers here, I expect the devs to do that. The problem is quite obvious and known since early Alpha stage–I bet even before.

Maybe there’s a more fundamental problem with their weather engine that they’re not able to get reliable and accurate live weather…?

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I wouldn’t see things that negatively :slight_smile: the devs are definitely committed to creating the best possible weather engine (and stated so again in the last Q&A) and there’s places in the world (Europe) where the weather seems mostly spot on! The Meteoblue data is also fine (up to maybe the pressure which can be a bit off). So there must be some bugs left (like the temperature from ATIS and the one shown on the PFD being way off at high elevations) and I hope they can be fixed sooner than later.

This is my experience as well. The time spent restarting the sim gets frustrating for sure.

I have also seen massive inconsistencies with the thunder/lightning since the most recent patch (1.9.3) and almost every flight I have taken indicates thunderstorm conditions.

For me it doesn’t work this way. When I start my first flight in places like KTEX, the barometric pressure is far off, and so is the temperature.

May I ask you to try in a place that’s quite a bit above sea level?

I just departed out of KTVL (Elev. 6268 ft) and got 29.92 plus 34°C (that is exactly the value you had at KTEX), while the METAR reads:

KTVL 071653Z AUTO 00000KT 10SM CLR 11/M04 A3021 RMK AO2 SLP195 T01111039

I was confident regarding the weather yesterday, but today’s flight is just frustrating :unamused:

Maybe the temperature is always 34-35°C for all high elevation fields? I see the same thing for Courchevel and Lukla. It’s definitely a bug. But if you have ATIS available at the airport, listen to it. It will tell you a different temp (at least did for me).

Regarding the pressure: the Meteoblue webpage (7-day weather, if you scroll down it shows a pressure value) says 1014 hPa, which is close to the 29.92 inHg you see and doesn’t agree with the METAR. To me, it rather seems to be the Meteoblue pressure data, not a sim bug.