Colorado Parks & Wildlife Research Library

An extensive discussion is presented on the characteristics of the vertical motion within the hurricane.

Satellite photographs during the summer months frequently reveal a weather situation in which strong convective development is observed over the Rocky Mountains and several hundred kilometers to the east of the mountains, while the region immediately to the lee is essentially cloud free. It is proposed that an orographically induced mesoscale wave phenomenon may produce this situation.

It is shown that a general class of nonlinear partial differential equations -- including those frequently used in predicting atmospheric motions -- can be converted to computational form by either the "finite difference" or "spectral" method to yield formally identical equations.

In a previous study Reiter and Mahlman (1965a) have estimated the amount of stratospheric air intruding into the stable layer of the jet stream front in a case of cyclogenesis not accompanied by surface radioactive fallout. In the present report the same case is examined on a more general basis. Outflow form, as well as inflow into, the stratosphere is estimated over the entire thickness of the "tropopause gap."