National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms and Excessive Rainfall Today

A few severe thunderstorms with large hail and damaging winds are possible this evening into tonight from eastern Kansas into western and central Missouri. Thunderstorms with heavy to excessive rainfall may produce flooding through tonight over parts of the northern High Plains, central Missouri, and along the Florida/Georgia line. 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?