❄️ Winter Weather & Hypothermia Risk
Wind Chill & Frostbite Calculator
Calculate winter apparent temperature and estimate minutes-to-frostbite on exposed skin using the official Joint Action Group on Temperature Indices (JAG/TI) NWS formula.
Winter Weather Inputs
Apparent Wind Chill Temperature
-5 °F (-20.6 °C)
Temperature Drop
-20 °F colder
Warning Level
Wind Chill Advisory 🟡
💡 Outdoor Protection Advice:
Wear insulated windproof outer layers, hat, and gloves. Cover all exposed skin to avoid frostbite.
The NWS Wind Chill Formula
Wind accelerates convective heat loss from human skin:
$$T_{wc} = 35.74 + 0.6215 T - 35.75 V^{0.16} + 0.4275 T V^{0.16}$$
Where $T$ is air temperature in °F and $V$ is wind speed in mph.