tornado, definition of

Humidity is a term for the amount of water vapor in the air, and can refer to any one of several measurements of humidity. Formally, humid air is not "moist air" but a mixture of water vapor and other constituents of air, and humidity is defined in terms of the water content of this mixture, called the Absolute humidity. In everyday usage, it commonly refers to relative humidity, expressed as a percent in weather forecasts and on household humidistat's; it is so called because it measures the current absolute humidity relative to the maximum. Specific humidity is a ratio of the water vapor content of the mixture to the dry air content (on a mass basis). The water vapor content of the mixture can be measured either as mass per volume or as a partial pressure, depending on the usage.

In meteorology, humidity indicates the likelihood of precipitation, dew, or fog. High relative humidity reduces the effectiveness of sweating in cooling the body by reducing the rate of evaporation of moisture from the skin. This effect is calculated in a heat index table, used during summer weather.

• Workers sue a tornado-hit candle factory in Kentucky
  Following eight deaths of candle factory workers in a tornado in western Kentucky, the surviving factory workers have filed a lawsuit against their employers...
• May Snaps Long-standing Streak for Strong Tornadoes in US
  Accuweather reports: During the month of May, the United States saw 288 preliminary reports of tornadoes, above the May average of 276 tornadoes. None of these storms were rated as stronger than…
• Demolition company tears down the wrong home after Google Maps error
  After a tornado damaged their duplex, owners Lindsay Diaz and Alan Cutter were looking to rebuild until a demolition company destroyed their Rowlett, Texas home on accident...
• Demolition company tears down wrong home after Google Maps error
  After a tornado damaged their duplex, owners Lindsay Diaz and Alan Cutter were looking to rebuild until a demolition company destroyed their Rowlett, Texas home on accident...
• Twister-shaped Oklahoma Weather Museum sits atop a 1920s warehouse in Tornado Alley
  The structure, located in an area known as Tornado Alley, would visually reference the movement of tornadoes, with lighting designed and placed to evoke a spinning motion...
• Tornado-shaped Oklahoma Weather Museum sits atop a 1920s warehouse in Tornado Alley
  The structure, located in an area known as Tornado Alley, would visually reference the movement of tornadoes, with lighting designed and placed to evoke a spinning motion...
• Introducing The New Dana Nuccitelli Commemorative WUWT Tornado Reference Page
  (Photo credits: NOAA) We are pleased to introduce WUWT’s newest addition, the WUWT Tornado Reference Page. We would like to dedicate this page to Dana Nuccitelli, of Skeptical Science infamy, who single-handedly managed to get Keith Kloor, Roger...
• Introducing The New Dana Nuccitelli Commerative WUWT Tornado Reference Page
  (Photo credits: NOAA) We are pleased to introduce WUWT’s newest addition, the WUWT Tornado Reference Page. We would like to dedicate this page to Dana Nuccitelli, of Skeptical Science infamy, who single-handedly managed to get Keith Kloor, Roger...
• At AGU 2013: Are tornadoes getting stronger? No.
  This AGU session asked that question directly and I covered this previously. Now that the video of the entire session is available, I thought it worth revisiting. Of course, the answer is “no”, even when they try to make a … Continue...
• For discussion – the tornado “hockey stick”
  I’m caught between sessions but wanted to post this. From a presentation at AGU that I couldn’t attend. This from SciAm: James Elsner at Florida State University has a killer curve, and lots of caveats. The curve indicates that tornadoes …...