National Weather Service United States Department of Commerce

Severe Weather Threat in the North-central Great Plains

Strong to severe storms are expected to bring severe wind gusts and large hail across parts of South Dakota and Nebraska. Additional thunderstorm activity likely Sunday from the Northern Plains into the Upper Great Lakes. A fire weather threat continues from portions of the Great Basin into the Rockies. Read More >

Vapor Pressure

by Tim Brice and Todd Hall
 
 
Enter a temperature or a dewpoint or both:
Vapor Pressure
If you want the saturated vapor pressure enter the air temperature:  saturated vapor pressure:
  Fahrenheit Celsius Kelvin mb in of HG mm HG 
hPA kPA lbs per square in
If you want the actual vapor pressure enter the dewpoint:  actual vapor pressure:
  Fahrenheit Celsius Kelvin mb in of HG mm HG 
hPA kPA lbs per square in
If you enter both the air temperature and the dewpoint you'll get a bonus answer.  relative humidity - requires both temp and dewpoint
  %

 

What is the formula for the vapor pressure script?