January 23, 2007 10:58
500mb charts work a little differently than surface charts. The contours on a 500 chart are actually heights at which the pressure is 500mb, so what you're seeing, for example, is 5675 meters elevation. However, in a practical sense they can be read like a surface chart.
Steve Dashew's Weather Handbook has a very extensive discussion of 500mb charts.
Scot
Steve Dashew's Weather Handbook has a very extensive discussion of 500mb charts.
Scot