Malcolm Ferguson said:
Wind chill is an important device for warning people about the dangers that might face from frost-
bite. In reality though, it is pretty variable measure that doesn't mean what people assume it to.
It's got some of the same problems that any index calculated from multiple variables has - it sorta
means something, but the individual components mean far more.
A couple weeks ago we had some strong winds (30-45mph, higher gusts) with temps about 0 to +12F with
windchill about -14F, iirc from the weather web page, but I may not have checked at the right time.
Last few days it's been calm with temps about -20F. And yes, I ran or snowshoe walk/ran twice in
both sets of conditions (windier or colder at other times). Although these appear different, within
rounding error of where the temperatures were taken, etc, they're probably similar numerically - but
the two sets of conditions have very different impacts on running. If anything, I would have guessed
frostbite was more likely with the windy conditions since it would bite through anything except good
wind gear. As you mention, windchill is about dangers of frostbite, and for running, the individual
components are more critical.
In my log, I generally record temperature - since that's what affects snow consistency, fluids
freezing, and clothing. I record wind speeds and direction (approx) since that can affect forward
motion, drifting snow, and what clothing layers worked. I also log my clothing layers. Occasionally
(like 1 or 2 times in 2 years of logging), I record wind chill in the comments section for
curiosity, but it doesn't mean as much as its two components, IMHO.
And blame the detail all on Doug 🙂 He's the one that suggested detailed logging, although without
decimal points.
Dot Beware of leaving slimfast in your car for 3 hrs at -25F and then drinking it right after coming
out of warm cross-training session. Not sure if that stuff supercools, but it sure caught my
attention Saturday.
--
"Success is different things to different people" -Bernd Heinrich in Racing the Antelope