I'm not sure of the exact height of Cairgorm summit, but at 6pm there was an
86 mph mean wind from the SE gusting 114 mph and a temperature of -3C. Now
that's what I call wind chill.

Regards
Rob

On Sat, 17 Jan 2009 20:15:50 -0000, "Rob Brooks"
wrote:

I'm not sure of the exact height of Cairgorm summit,...

1245 metres.

The hill is Cairn Gorm :-)

--
Alan White
Mozilla Firefox and Forte Agent.
Twenty-eight miles NW of Glasgow, overlooking Lochs Long and Goil in Argyll, Scotland.
Webcam and weather:- http://windycroft.gt-britain.co.uk/weather

Rob Brooks wrote:

I'm not sure of the exact height of Cairgorm summit, but at 6pm there was
an 86 mph mean wind from the SE gusting 114 mph and a temperature of -3C.
Now that's what I call wind chill.


I believe that above approx. 70 mph the wind chill actually reduces as
friction from the moving air begins to out-weigh the wind chill effect.


--
Brian Wakem

On Jan 17, 11:54*pm, Brian Wakem wrote:
Rob Brooks wrote:
I'm not sure of the exact height of Cairgorm summit, but at 6pm there was
an 86 mph mean wind from the SE gusting 114 mph and a temperature of -3C.
Now that's what I call wind chill.

I believe that above approx. 70 mph the wind chill actually reduces as
friction from the moving air begins to out-weigh the wind chill effect.

--
Brian Wakem

The aerodynamic heating at 70 mph is less than half a degree
so is negligible. On the other hand the increase in windchill with
speed at that sort of speed must be very small or zero, depending on
which formula you use, so your proposition may well be true.

Tudor Hughes, Warlingham, Surrey.

On Sat, 17 Jan 2009 at 20:05:10, Tudor Hughes wrote
in uk.sci.weather :

On Jan 17, 11:54*pm, Brian Wakem wrote:
Rob Brooks wrote:
I'm not sure of the exact height of Cairgorm summit, but at 6pm there was
an 86 mph mean wind from the SE gusting 114 mph and a temperature of -3C.
Now that's what I call wind chill.

I believe that above approx. 70 mph the wind chill actually reduces as
friction from the moving air begins to out-weigh the wind chill effect.

The aerodynamic heating at 70 mph is less than half a degree
so is negligible. On the other hand the increase in windchill with
speed at that sort of speed must be very small or zero, depending on
which formula you use, so your proposition may well be true.

Either way, you'd still be an icicle in minutes!
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)

Looks like there's been some damage to the ski lifts (hardly
surprising).

http://www.cairngormmountain.com/web...nCamLarge.html

"Purbeckview" wrote in message
...
Looks like there's been some damage to the ski lifts (hardly
surprising).

http://www.cairngormmountain.com/web...nCamLarge.html

I would have thought that winds of 100mph+ were relitively common up
there, and any structures would be designed to withstand them.
Hasn't Cairngorm had winds approaching 150mph?
--
Col

Bolton, Lancashire
160m asl

"Col" wrote in message
...

"Purbeckview" wrote in message
...
Looks like there's been some damage to the ski lifts (hardly
surprising).

http://www.cairngormmountain.com/web...nCamLarge.html

I would have thought that winds of 100mph+ were relitively common up
there, and any structures would be designed to withstand them.
Hasn't Cairngorm had winds approaching 150mph?

Interestingly, Countryfile has just done a feature on the Cairngorm
weather station, and they said that winds of over 100mph were pretty
common. It looks a pretty desolate place though, they had to hack
their way in with an ice axe!
--
Col

Bolton, Lancashire
160m asl

On Sun, 18 Jan 2009 12:09:56 -0000, "Col" wrote:

Interestingly, Countryfile has just done a feature on the Cairngorm
weather station, and they said that winds of over 100mph were pretty
common. It looks a pretty desolate place though, they had to hack
their way in with an ice axe!

I was up there in 1987 and the weather station was enclosed. When a reading was
due, it emerged, accompanied by the sound of grinding motors, stayed out for a
little while and then disappeared into its 'box'.

Things may have changed since then.

--
Alan White
Mozilla Firefox and Forte Agent.
Twenty-eight miles NW of Glasgow, overlooking Lochs Long and Goil in Argyll, Scotland.
Webcam and weather:- http://windycroft.gt-britain.co.uk/weather

"Alan White" wrote in message
...
On Sun, 18 Jan 2009 12:09:56 -0000, "Col"
wrote:

Interestingly, Countryfile has just done a feature on the Cairngorm
weather station, and they said that winds of over 100mph were pretty
common. It looks a pretty desolate place though, they had to hack
their way in with an ice axe!

I was up there in 1987 and the weather station was enclosed. When a
reading was
due, it emerged, accompanied by the sound of grinding motors, stayed out
for a
little while and then disappeared into its 'box'.

Things may have changed since then.

It looked pretty similar to how you described it.
Due to the threat of icing, every half hour the instruments would poke their
heads above the parapet as it were, take their readings and then retreat
into their warm box.

As an aside, I've done a little digging and Cairngorm has recorded a
windspeed of 150 *knots* not 150mph as I supposed.
That's 170mph, must have been quite a gale!
This is also the British record, on 20th march 1986.
--
Col

Bolton, Lancashire
160m asl