Wind direction is defined as the direction from which the wind blows, and is measured clockwise from geographical north, namely, true north (based on the World Geodetic System 1984 (WGS-84) and its Earth Geodetic Model 1996 (EGM96)). - source: WMO

Thanks for your detailed answer, helps a lot. It is good to see that the information is implemented in the UI but is just not visible for me.
I am using iOS 12.1.2 with Windy.com v. 17.05 with an iPhone 5s. My App Store and settings tell me both the App and the OS are updated to their latest versions.

I am not familiar with weather reports in the flight sector but according to German weather service (DWD) it is reported in true north(German source: DWD).

Wind direction is defined as the direction from which the wind blows, and is measured clockwise from geographical north, namely, true north (based on the World Geodetic System 1984 (WGS-84) and its Earth Geodetic Model 1996 (EGM96)). - source: WMO

Is it possible to see isolines of geopotential height for a given pressure level in the iOS App?

Thanks for your detailed answer, helps a lot. It is good to see that the information is implemented in the UI but is just not visible for me.
I am using iOS 12.1.2 with Windy.com v. 17.05 with an iPhone 5s. My App Store and settings tell me both the App and the OS are updated to their latest versions.

Any options to get HIRLAM SKA data? Should significantly improve the resolution. If no I vote 2.

Hey everyone,
I have two rather simple questions regarding the wind (representation of data) and wave forecast. In the picture below you can see the comparison of wind forecasts at a specific location. As you can see the vector map (showing the ICON data) does not match the ICON wind vector. I am assuming the model output is represented by the vector, while the vector field is just a stylised representation of the data? Or is it using a different time?

In the lower part of the second picture you can see the wave forecast for a specific location. What do the actual rows mean? The first one is obviously wind and gusts (smaller numbers), the third one is wave forecast 1 (Seegang "1"m, 10s). The other two (row two and four) are a miracle to me. What do they mean?

Thanks in advance,
Giovanni