Wind Chill Temperature Calculator (NOAA Model)
PHP Program by Jay Tanner
Given the true outdoor temperature in degrees Fahrenheit and the wind speed in statute miles per hour, this program will compute the theoretical wind chill temperature according to the NOAA formula.  The formula pertains to a worst-case nighttime scenario with no solar influence.

 Temperature (−50  to  +40)  =   °F            Wind Speed (0  to  130)  =   (mi / h)
Theoretical Wind Chill Temperature  =  ` +36° F`

The NOAA Formula:

Let:
``` F = True outdoor temperature °F W = Wind speed mi/h ```

Then:
Wind Chill °F  =  35.74  +  0.6215 × F ` - ` 35.75 × W 0.16  +  0.4275 × F × W 0.16

• WHAT THE NOAA WIND CHILL MODEL DOES:

• Calculates wind speed at an average height of 5 feet, the typical height of an adult human face, based on readings from the national standard height of 33 feet, which is the typical height of an anemometer. (instrument used to measure wind speed)

• Is based on a human face model.

• Incorporates heat transfer theory based on heat loss from the body to its surroundings, during cold and breezy/windy days.

• Lowers the calm wind threshold to 3 mph.

• Uses a consistent standard for skin tissue resistance.

• Assumes no impact from the sun, i.e., clear night sky.

Reference:
https://www.weather.gov/safety/cold-wind-chill-chart
Jay Tanner - 2024