Isotach line map

http://tornado.sfsu.edu/geosciences/classes/m201/Graphics2009/4_24_09
This is a map of isotach that represent the speed of wind and where it is blowing. This map is a combination of these things but the isotach map is represented in the color coating on the map. In the middle of the country there is a split block which leaves and area of no activity in the middle of the country. There is also a digging trough on the west coast and a mature trough on the east coast. Enjoy!!!