National Weather Service United States Department of Commerce

Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

       

 

Weather Calculations / Conversions


Convert degrees Celsius to degrees Fahrenheit:
Enter degrees celsius:

    


Convert degrees Fahrenheit to degrees Celsius:
Enter degrees fahrenheit:

    


Calculate relative humidity from temperature/dewpoint (deg C):
Enter temperature in degrees C:     Enter dewpoint in degrees C:

    


Calculate relative humidity from temperature/dewpoint (deg F):
Enter temperature in degrees F:     Enter dewpoint in degrees F:

    


Calculate heat index from temperature and humidity:
Enter temperature in degrees F:     Enter humidity in percent:

   :


Calculate heat index from temperature and dewpoint (deg F):
Enter temperature in degrees F:     Enter dewpoint in degrees F:

   :


Calculate heat index from temperature and dewpoint (deg C):
Enter temperature in degrees C:     Enter dewpoint in degrees C:

   :


Calculate wind chill from temperature (deg F) and wind (mph):
Enter temperature in degrees F:     Enter wind speed in mph:

   :


Calculate wind chill from temperature (deg C) and wind (kt):
Enter temperature in degrees C:     Enter wind speed in knots:

   :


Convert pressure from inches to millibars:
Enter pressure in inches: