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Which hazard is associated with foehn conditions?

  • A.Rapid snowmelt and elevated wildfire risk
  • B.Freezing rain, which forms where the warm descending air overruns a shallow layer of cold air beneath it
  • C.Dense fog
  • D.Severe icing, produced by the supercooled droplets carried over the barrier from the windward side above

Answer: A

Warm dry wind melts snow rapidly, contributing to spring flooding, and dries vegetation to the point where fires spread readily, as in several Alpine and Colorado events. The chinook is known locally as the snow eater for exactly this reason. Fog and icing require moisture, which the foehn has largely removed.

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