RE: [Leica] Cold in Canada, Cold in Natchitoches

[Tim Atherton <tim@KairosPhoto.com>]

> -----Original Message-----
> From: owner-leica-users@mejac.palo-alto.ca.us
> [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of John
> Collier
> Sent: Monday, January 05, 2004 6:01 PM
> To: leica-users@mejac.palo-alto.ca.us
> Subject: Re: [Leica] Cold in Canada, Cold in Natchitoches
>
>
> Temperature is only one factor. Humidity is also very important. Up
> here in Edmonton we often hit -25C and occasionally spend sometime
> lower than -30C. However, it is very very dry. You just do not feel the
> cold like you do in a more humid climate. My hometown seldom gets below
> -15C or so but there is a lot more moisture in the air. Moisture really
> increases the rate of heat loss. I would rather have -15C in dry
> Edmonton than -5C in my moist hometown. A cold moist wind really cuts
> through you. Naturally at really cold temps it just isn't possible to
> have much of any moisture in the air. -30C feels pretty much the same
> everywhere for this very reason.
>
> I agree that wind chill factors can be very misleading. Wind chill
> factors only refer to the rate at which heat is lost not to the actual
> temperature achieved. An actual temperature of -40C is much more
> daunting to operate in (clothing gets very stiff and many materials
> become brittle) than an ambient temperature of -25C with a wind chill
> factor supposedly making it the equivalent of -40C.

But when it's -35c with no breeze I can happily take out the garbage with a
thick sweater and no gloves

When I tried that on the weekend with a 10mph breeze added, I can tell you,
it sure felt like the advertised -51c equivalent with windchill! Lets say it
took ten minutes to get the feeling back in my fingers... :-)

tim

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