National Weather Service United States Department of Commerce

Inclement Weather Continues in the West; Heavy Precipitation Possible Over The Southern And Eastern U.S. Next Week

The inclement weather pattern over the western U.S. will likely continue into the weekend. Potential exists for additional rain over burn scar areas in California, heavy mountain snow, and critical fire weather over the Plains. By next week, Heavy rain with potential flooding will be possible over the southern U.S. with wintry precipitation from the Mid Atlantic to the Northeast early to mid week. 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?