Isotachs

Keeping with the meteorology theme of the last few posts, the above map is what is known as an isotachs.  An isotachs is line in a given surface connecting points with equal wind speed.  This is similar to the below map of an isobar.  The above map is showing the wind speeds of hurricane Emily that hit North Carolina and Virginia in 1993.  As you can see from the map the highest wind speed sustained in this hurricane was 40 mph.

The map URL is: http://www.aoml.noaa.gov/hrd/project97/sh_proj3.html