CalculateWindChill(intAirTemperature, intWindSpeed)
Last updated August 22, 2001
Version: 1 | Requires: ColdFusion 5 | Library: ScienceLib
Description:
This function calculates the wind chill based upon the new NWS Wind Chill Index calculations.
Source: http://www.crh.noaa.gov/dmx/0winter/new_windchill.html
According to the documentation, this new cacluation will:
- Use wind speed calculated at 5 feet (average human face height)
- Be based upon a human face model
- Incorporate modern heat flow theory
- Lower the calm wind threshold to 3 mph
- Use a consistant standard for skin tissue resistance
- Assume the worst case for solar radiation (clear night sky)
Return Values:
Returns the wind chill.
Example:
<cfset VARIABLES.intWindSpeed = 30>
The Wind Chill is <cfoutput>#CalculateWindChill(VARIABLES.intFahrenheit, VARIABLES.intWindSpeed)#</cfoutput> degrees Fahrenheit.<br>
Parameters:
| Name | Description | Required |
|---|---|---|
| intAirTemperature | Temperature | Yes |
| intWindSpeed | Wind speed in MPH | Yes |
Full UDF Source:
<cfscript>
/**
* This function calculates the wind chill based upon the new NWS Wind Chill Index calculations.
*
* @param intAirTemperature Temperature
* @param intWindSpeed Wind speed in MPH
* @return Returns the wind chill.
* @author Russel Madere (rmadere@turbosquid.com)
* @version 1, August 22, 2001
*/
function CalculateWindChill(intAirTemperature, intWindSpeed)
{
return Round(35.74 + (0.6215 * intAirTemperature) - (35.75 * (intWindSpeed ^ 0.16)) + (0.4275 * intAirTemperature * (intWindSpeed ^ 0.16)));
}
</cfscript>
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