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The Washington Post

A oft-repeated water vapor myth is that warm air can “hold” more water vapor than cool air.

  • Jack Williams
  • ·
  • Sep 11, 2013
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The period from June 30 through July 23, 2013 in Washington, D.C. was the second most humid in recorded history (dating back to 1937).

  • Rick Grow
  • ·
  • Aug 12, 2013
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The assumption that humid air is heavier than dry air is wrong. Learn why...

  • Jack Williams
  • ·
  • Aug 5, 2013
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When a meteorologist or a dedicated weather weenie hears the “90-degree heat with 90 percent humidity” refrain he or she winces and wants to say something like, “It never happens here."

  • Jack Williams
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  • Jul 8, 2013
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The dryness of Death Valley's heat means it doesn't actually feel as hot there as it does in Washington on our hottest days.