Upper air temperatures
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Upper air temp. on the map is not the same as on sounding.
Temp. at 250 hPa (FL340) is -56C (confirmed by official prognostic chart).
Sounding shows temp. at FL340 is -59C.(wrong).
The cause is that sounding uses interpolated values from 300 hPa and 200 hPa.
for better results you must, also, take into account values at 250 hPa (its a standard level).Also, keep in mind that tropopause usually lies at these levels
so you cannot interpolate temperatures as tropopause is a discontinuity surface. -
.... official chart confirms that temperature at FL340 over NW Greece is -56C
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@Gkikas-LGPZ
I thought that the blue curve (and blue figure) was the dew point and the red curve the temperature shown by the dry thermometer. But may be I’m wrong, being not familiar with atmosphere soundings. -
@idefix37
Yes! You're right. Red curve and numbers stand for temperature.
But, the problem I mentioned still exists!
(confirmed temp. at 250 hPa = -56C. Sounding temp. -53C). -
... the straight line from (A) to (B) shows that no other level (from 300 hPa to 200 hPa) is taken into account.
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@Gkikas-LGPZ Thank you for investigation. Yes, it seems that the 250hPa layer is missing in sounding. I will look at it.
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@TZ
any progress ? -
@Gkikas-LGPZ Hi, I appologize for the delay. My colleague is now working on another upper air task, so he also will add the 250h layer for sounding. If everything goes well, it should be done during this week.
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@TZ
Thank you.
I'm very glad to see that Windy provides such "professional" tools (like sounding). -
@Gkikas-LGPZ And I am happy that you find it useful. I have a list of improvements for the sounding graph, but unfortunately it has small priority now.
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@TZ
It is fully understandable! -
@TZ said in Upper air temperatures:
the 250hPa layer is missing in sounding
I think you solved this problem! 250 hPa data in sounding are not missing anymore!
Thank you!
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Ohh ! not again!
