Railroad Ink: Sky Expansion Pack

From Horrible Guild: 

The Sky Expansion Pack contains 2 unique expansions: Weather and Airline!

Control clouds, rain, and snow and prevent weather fronts from colliding to score bonus points with the Weather Expansion, or use air routes and airports to extend your networks to the sky with the Airline Expansion!

This is an expansion for Railroad Ink™ or Railroad Ink Challenge™! At least one core game is required to play.