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Weather Calculators
Use these nifty calculators to convert temperatures, calculate wind chill and more! 

These scripts were written by Ron Murphy of the Birmingham, Ala., office of the National Weather Service.

Temperature Conversion

Enter a number then click on the appropriate number to see the result.
Fahrenheit (oF)
Celsius (oC)
Wind Chill/Temperature Index Calculation in degrees Fahrenheit

Enter in the air temperature ( Tair ) in degrees Fahrenheit and wind speed in mile per hour ( mph ), then click on the Calculate WC to compute the windchill ( WC ).
Tairo F mph
For more information about windchill (ie. equation) click here.

Wind Chill / Temperature Index Calculators

Wind Chill/Temperature Index Calculation in degrees Celsius

Enter in the air temperature ( Tair ) in degrees Celsius and wind speed in miles per hour, then click on the Calculate WC to compute the windchill ( WC ).
Tair o C mph
For more information about windchill (ie. equation) click here.

Relative Humidity Calculators

Relative Humidity Calculation using degrees Fahrenheit

Enter in the air temperature ( Tair ) and dew point temperature ( Tdp) in degrees Fahrenheit ( oF ) then click on the Calculate RH to compute the relative humidity ( RH ).
Tair ( o F ) Tdp ( o F ) RH
Tair
Tdp
For the relative humidity equation, go here
Relative Humidity Calculation using degrees Celsius

Enter in the air temperature ( Tair ) and dew point temperature ( Tdp) in degrees Celsius ( oF ) then click on the Calculate RH to compute the relative humidity ( RH ).
Tair ( o C ) Tdp ( o C ) RH
Tair
Tdp
For the relative humidity equation, go here

Heat Index Calculation

 Valid entries are, air temperatures greater than 80 °F ( 27 °C ), dew point temperatures greater than 65 °F ( 12 °C ), and relative humidities higher than 40 percent.

For more information on Heat Index, go here.

in Celsius

Enter in the air temperature ( Tair ) and the dew point temperature ( Tdp ) in degrees Celsius, then click on the Calculate HI to compute the heat index ( HI).
Tair in °C Tdp in °C RH =
in Fahrenheit

Enter in the air temperature ( Tair ) the dew point temperature ( Tdp ) in degrees Fahrenheit, then click on the Calculate HI to compute the heat index ( HI).
Tair in °F Tdp in °F RH =
in Celsius

Enter in the air temperature ( Tair ) in degrees Celsius and relative humidity ( RH ) in percent ( without the % sign ), then click on the Calculate HI to compute the heat index ( HI ).
Tair in °C RH Tdp =
in Fahrenheit

Enter in the air temperature ( Tair ) in degrees Fahrenheit and relative humidity ( RH ) in percent ( without the % sign ), then click on the Calculate HI to compute the heat index ( HI ).
Tair in °F RH Tdp =
 

Wind Speed Conversion

Courtesy of NOAA
Enter a wind speed that you would like to convert:
 Input-> Output:
mph mph
knots knots
m/s m/s
ft/s ft/s
km/h km/h


Storm Distance Calculator

Storm Distance Calculator
Enter the latitude and longitude of a storm and your city (or any two points) to find the distance between them.
City Storm Distance
Lat: oN
Lon: oW		 Lat: oN
Lon: oW		 Miles
Find your Latitude and Longitude by zip code at the U.S. Gazetteer
 
  Storm Distance Calculator from www.hurricanehollow.com  
     

Copyright 2003-2004 | Hurricane Consulting Inc.

Last updated:

May 23 2010, 12:27 pm

Copyright 2003-2008 | Hurricane Consulting Inc.