Wind Chill Frostbite Chart
Wind Chill Chart
The Wind Chill Chart shown above (from the National Weather Service) is a temperature index which accurately indicates how cold the air feels on human skin.
The Wind Chill Chart includes a frostbite indicator, showing the temperatures at which wind speed and exposure time will produce frostbite by the three color shaded areas of temperatures versus 30, 10, and 5 minutes until frostbite on exposed skin.
For example, using the chart – a temperature of 0°F and a wind speed of 15 mph will produce a wind chill temperature of -19°F. Under these conditions, exposed skin can freeze in 30 minutes!
What is Wind Chill Temperature?
It is the temperature it “feels like” outside and is based on the rate of heat loss from exposed skin caused by the effects of wind and cold. As the wind increases, the body is cooled at a faster rate causing the skin temperature to drop. Wind Chill does not impact objects that are not ‘alive’ like car radiators and exposed water pipes, because these objects cannot cool below the actual air temperature.
What is Frostbite?
Frostbite is an injury to the body caused by freezing body tissue. The most susceptible parts of the body are the extremities such as fingers, toes, ear lobes, or the tip of the nose. Symptoms include a loss of feeling in the extremity and a white or pale appearance. Medical attention is needed immediately for frostbite. The area should be SLOWLY re-warmed.
What is Hypothermia?
Hypothermia is abnormally low body temperature (below 95 degrees Fahrenheit). Warning signs include uncontrollable shivering, memory loss, disorientation, incoherence, slurred speech, drowsiness, and apparent exhaustion. Medical attention is needed immediately. If it is not available, begin warming the body SLOWLY.
Tips on how to dress during cold weather
Wear layers of loose fitting warm clothing. Trapped air between layers provides insulation.
Outer garments should be tightly woven, water repellent, and hooded.
Wear a hat, because 40% of your body heat can be lost from your head.
Use a face mask which can cover your mouth to protect your lungs from extreme cold.
Mittens, snug at the wrist, are generally better than gloves.
Keep your clothing clean. Dirty clothes clog the insulating properties.
Avoid overheating. When you sweat you loose heat faster.