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Water vapor Imagery

Water vapor imagery is useful for weather analysis and forecasting.


Water vapor is transparent to visible and IR radiation.


Water vapor absorbs and emits radiation between 6.5 and 6.9 microns.


Satellite radiometers measure the amount of radiation emitted by the atmosphere at these wavelengths to detect water vapor.


Water vapor satellite images show water vapor concentration between 200 and 500 mb.


Low amounts of water vapor are indicated by black and high concentrations by milky white.


Bright white regions correspond to cirrus clouds.


Strong contrast in water vapor in middle latitude regions indicates the presence of a jet stream. 

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