National Weather Service United States Department of Commerce

Rain Continues From Mid-Atlantic to Southern New England Sunday; Ice on the Northern Edge; Northwest to See More Rain and Snow

A storm system will cross the Mid-Atlantic region then shift south of New England through Sunday with widespread rain. On the northern edge, freezing rain and snow will be possible from Upstate New York into interior southern New England. On the West Coast, deep moisture ahead of a cold front will bring rain, high elevation snow, and gusty winds into Sunday. 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?