formula-based apparent temperature index
Heat index combines air temperature and RH as apparent temperature using NWS operational equations.
reference-only Converter
formula-based apparent temperature index
wind chill temperature
exact
- Record
- M658
- Definition quality
- Documented range
- Conversion mode
- formula
- Calculator
- Formula-based
NWS wind chill is defined for T≤50°F and wind speed >3 mph. A below-freezing wind-chill index does not make above-freezing air physically below freezing.
Definition
Wind chill is a human heat-loss index calculated from air temperature and wind speed.
Reference value
wind chill temperature converts through a formula rather than a simple multiplier.
Modern use
Modern use is context-dependent and varies by region or measurement system.