1) Describe what type of cloud or phenomena might be present when visible and IR images of the same area indicate:
a) Both images show a dark cloud
Thin, low (warmer) clouds
b) Both images show a bright white cloud
Thick, high (cold) clouds
c) Visible images show a white cloud & IR shows a dark cloud
Thick, low (warmer) clouds. Probably stratus and possibly fog
d) Visible shows a dark cloud and IR depicts a white cloud
Thin, high (cold) clouds, probably cirrus or cirrostratus

2) When using a water vapor image, what does the darker areas indicate?
Drier air

3) What might be the cause of a continuous dark area in a meandering snakelike pattern on a water vapor image that extends from coast to coast over North America?
This is probably the location of the jet stream!