National Weather Service United States Department of Commerce

Areas of Excessive Rainfall and Fire Weather Today; Wildfire Smoke Bringing Unhealthy Air Quality to the Pacific Northwest

In southeast Texas, the coastal Carolinas, and much of New Mexico today, showers and thunderstorms may bring excessive rainfall which could lead to areas of flooding. Dry, gusty winds will contribute to scattered areas of elevated to critical fire weather today in the western U.S. Wildfire smoke is causing unhealthy air quality today in parts of the Pacific Northwest and central Plains. 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?