> >Wind chill is really only an issue if the wind is against bare skin
> ...i think you're forgetting the role w/c can also play on the running surface.
> i find the potentiality of coming across a patch of black ice increass w/the
> increase in windchill (just my experience)... that's actually my greatest
> concern in this type of weather...hit a patch of black ice.
> i gotta figrue thousands of runners annual suffer all sorts of injuries from
> hitting black ice and i bet some on this ng have a few stories of encounters
> w/black ice.
Apparently if it's cold enough to freeze and create
ice, the wind won't make a lot of difference.
The old wind chill charts were much colder and thought
unrealistic for calculating it, since the wind speeds
used were at 33 feet above ground. New wind chills are
calulated at 5 feet above the ground, since this is
the average height it impacts human skin, and are much
warmer. This is from the NWS wind chill info:
What is Wind Chill?
Wind Chill is the term used to describe the rate of heat loss on the
human body resulting from the combined effect of low temperature and
wind. As winds increase, heat is carried away from the body at a faster
rate, driving down both the skin temperature and eventually the internal
body temperature. While exposure to low wind chills can be life
threatening to both humans and animals alike, the only effect that wind
chill has on inanimate objects, such as vehicles, is that it shortens
the time that it takes the object to cool to the actual air temperature
(it cannot cool the object down below that temperature). Water freezes
at 32 degrees regardless of what the wind chill is.