Interesting... "a visualization of global weather conditions, forecast by supercomputers, updated every three hours"
...the kind of thing you could sit and watch for hours
I found this, from the About screen, helpful. Because I'd assumed, from just looking at it, that the smaller number I clicked on (10hPa) was closer to the surface, but that's not the case (The various altitudes were mentioned in the video, but, not knowing a hectopascal from a hugelkulture, it didn't sink in)...Hectopascal being a measure of pressure, and pressure being higher at the surface....
1000 hPa | ~100 m, surface conditions
850 hPa | ~1,500 m, planetary boundary, low
700 hPa | ~3,500 m, planetary boundary, high
500 hPa | ~5,000 m, vorticity
250 hPa | ~10,500 m, jet stream
70 hPa | ~17,500 m, stratosphere
10 hPa | ~26,500 m, even more stratosphere
Who among you feels worthy enough to be my best friend? Test 1 is to read this tiny ad: