Add custom isotherm/isobar etc to maps?

[podzol]

Add iso line to maps?
i’d love to be able to add a distinct contrasting line (white maybe) for thresholds on maps.
for example:
0C/32F on temperature.
Elevation threshold on cloud tops and bottoms
This would make it easier to see if your location will meet whatever threshold you happen to be watching.

[Suty]

@podzol HI, can you please provide screenshot of expected visualization?

[Caefix]

Two sets of isolines visible at once was quite convenient, too.
Esp. temperature & freezing altitude was a fine combination.

Btw. Since the data comes from weather stations, could pressure be displayed in the balloons instead of temp or gust? Then we could identify fast, which model´s isobars are the closest to the situation.