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Blizzard Conditions Over the Sierra Nevada Mountains; Critical Fire Weather in the High Plains

A strong winter storm across the west is currently producing heavy mountain snow, strong/high winds, and heavy low elevation rain to parts of the Pacific Northwest, Great Basin, California and the northern/central Rockies. Impacts are expected to continue through Sunday. Across the High Plains, strong winds and dry air will support Critical to Elevated fire weather conditions through the weekend. Read More >

Relative Humidity

by Tim Brice and Todd Hall
 
 
Enter a temperature, relative humidity and actual station pressure
 
Temperature:  wet-bulb  unit

dewpoint

Fahrenheit Celsius Kelvin Fahrenheit
RH: Celsius
% Kelvin
Enter your actual station pressure (not the altimeter setting):  
in of mercury mm of mercury millibars (hPA)  

 

What is the formula for the relative humidity script?