National Weather Service United States Department of Commerce

Heavy Snow in the Upper Great Lakes; Thunderstorms in the Ohio Valley and Mid-Atlantic

A strengthening storm system over the Upper Great Lakes will bring moderate to heavy snow to northeast Minnesota and the Upper Peninsula of Michigan. Ahead of this system, strong to severe storms may develop over the Upper Ohio Valley eastward to the Mid-Atlantic. Heavy rains may bring an isolated flash flooding threat over the central Appalachians, particularly in West Virginia. Read More >

Dewpoint

by Tim Brice and Todd Hall
 
 
Enter a temperature, dewpoint and actual station pressure
 
Temperature:  wet-bulb temperature
Fahrenheit Celsius Kelvin Fahrenheit
Dewpoint: Celsius
Fahrenheit Celsius Kelvin Kelvin
Enter your actual station pressure (not the altimeter setting):  relative humidity
in of mercury mm of mercury millibars (hPA) %

 

What is the formula for the dewpoint script?