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 - Feb 28, 2001
 
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Cloud seeding will require that there be SOME humidity in the air.  On the west coast between the shore and the western-most mountain range (specific names differ for different range, but parts of the Rocky Mountains), seeding has a decent chance.  On the eastern side, the problem is that the moisture in the air has been diminished by adiabatic cooling as the on-shore breezes go up the slopes of the mountains.  Therefore, seeding closer to the east of the Rockies is going to be less effective.