Pressure/Isobars Display

[Psamathe]

Add an option to display pressure as Isobar lines rather than shaded areas. Isobar lines are easier is get an impression of pressure gradient and speed of weather pattern movement as you swipe through time.

[Ohan]

This was the answer last time the topic came up:

@duane

Isobars are very hard to do with the swiping action. They are too costly to compute on the fly. I’ve been thinking of way to do this or pre-compute them - it’s not easy. There might be some tricks in OpenGL to do this but I haven’t tried them yet.

In my upcoming release, you can turn on pressure with stepped color which indicates these isobars.

Not sure if this the case.
Regardless, you could give the stepped color a try.