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Windy.com showing "medium cloud" but no "cloud tops" for it

10 Posts

Look at NE France.

I thought the very definition of “medium cloud” would make this impossible.

But… when you click somewhere within that region, you get this

What seems to be happening is that the cloud top colour coding just happens to coincide with the background:

Administrator
Shoreham EGKA, United Kingdom

The edge of the blue area where you placed your marker corresponds to 1900m on the legend. A bit hard to see but it’s there.

always learning
LO__, Austria

You mean you see no blueish grey shading at Troyes? I can clearly see it, maybe try another device or different colour settings for your screen.

EDQH, Germany

Bright ambient and a laptop

Administrator
Shoreham EGKA, United Kingdom

What a cool feature!

But still there are major inconsistencies between cloud coverage and cloud tops of medium level clouds. Today there are areas which show 99% cover (overcast) of medium level clouds, but cloud top far below 2000m, which is low level according to their definition.

See here:
https://community.windy.com/topic/4117/clouds/3

We should keep this thread updated with Pireps here. This could turn out to be a great feature, if it was reliably indicating tops at steps of 100 meters of altitude. Hard to believe it!

Last Edited by UdoR at 05 Jun 09:02
Germany

I’ve been using the Distance & Planning feature

Only in “VFR” mode can one see the IMC profile along the route. But this profile goes only up to 10k feet

Is there any way to adjust this?

Basically the IMC profile does not relate to the main screen medium cloud, high cloud, cloud tops, etc.

I also found this, FWIW

(for ECMWF model)
… cloud layers are assigned as:
High-level cloud cover (HCC). – Cloud integrated from top of the atmosphere down to 450hPa.
Medium-level cloud cover (MCC). – Cloud integrated from 450hPa down to 800hPa.
Low-level cloud cover (LCC). – Cloud integrated from 800hPa* down to the surface.

source: https://confluence.ecmwf.int/display/FUG/Clouds

Administrator
Shoreham EGKA, United Kingdom

BTW Distance and planning is available on iPad and iPhone apps from the latest version.

LDZA LDVA, Croatia

Looks like nobody knows the answer, or there isn’t one and the profile is just fixed at 10k feet height.

Administrator
Shoreham EGKA, United Kingdom

Looks like nobody knows the answer, or there isn’t one and the profile is just fixed at 10k feet height.

It’s fixed based on idea that VFR flights are executed at low altitudes.

LDZA LDVA, Croatia

Haha yeah right we all do that

Administrator
Shoreham EGKA, United Kingdom
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