National Weather Service United States Department of Commerce

Flash Flood Risk across the Ohio Valley Today; Severe Storms Possible from the Ohio Valley to Southern Plains

Thunderstorms will produce additional heavy rainfall across much of the Ohio Valley through this evening, leading to a moderate risk for flash flooding due to grounds already being saturated across the region. Elsewhere, severe thunderstorms are possible from the Ohio Valley to the Southern Plains, and critical fire weather conditions are forecast across parts of the Pacific Northwest today. 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?