National Weather Service United States Department of Commerce

Heat, Severe and Fire Weather

Excessive heat warnings persist across the Desert Southwest, while the heat and humidity lingers along the East Coast. An extensive zone of strong to severe thunderstorms with damaging winds and locally heavy rain are expected along a strong cold front from New England to the south-central Plains. Finally, elevated fire weather threats/red flag warnings are likely across the Inter-mountain West. Read More >

Density Altitude

by Tim Brice and Todd Hall

 

 
 
 
Enter the air temperature and choose a unit: Density Altitude in feet:
Fahrenheit Celsius Kelvin ft
Enter the actual station pressure (not the altimeter setting) and choose a unit: Density Altitude in meters:
in of mercury mm of mercury millibars (hPA) m
Enter the dewpoint and choose a unit:  
Fahrenheit Celsius Kelvin  

 

What is the formula for the density altitude script?