[WR] Haytor 03/12/06 (phew!)
 

0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was 41
knots (49 mph). I did say I expected the strongest wind to be on the front. This
is my highest recorded gust so far. I am relieved to say that there has been no
damage to the house as far as I can tell. That was higher than expected as I am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.
--
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A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet).

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DISCLAIMER - All views and opinions expressed by myself are personal
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Haytor 03/12/06 (phew!)
 

Will Hand wrote:
0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was 41
knots (49 mph). I did say I expected the strongest wind to be on the front. This
is my highest recorded gust so far. I am relieved to say that there has been no
damage to the house as far as I can tell. That was higher than expected as I am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.

Hi, Will,

I'm a bit confused with this. My Met O Observers Handbook states that
only mean windspeed should be adjusted to an effective height of 10
metres. Gusts should be reported as read with no alteration.
Has this changed and am I living in the past yet again?
49mph gust at 9 metres agl here, so nothing special yet.

Ken
Copley, nr Barnard Castle, Teesdale, County Durham
http://copley.mysite.orange.co.uk

[WR] Haytor 03/12/06 (phew!)
 

Actually, as a postscript, I take my hat off to the Edwardian builders who built
my house. It is made of solid brick rendered with cement. The roof is slate on
wooden boards (no felt), and I never heard the slates move at all. I guess it
has withstood much worse in the past (like the trees). However, in the 1987
storm I was living in Crowthorne Berkshire and the highest gust (recorded from
nearby station was circa 60 knots) and all night the tiles were shifting in a
worrying fashion but survived, unlike two trees one of which crashed through my
daughter's bedroom window. However, the 1987 gale lasted far longer than last
nights with repeated strong gusts, last nights gusts (although stronger) were
less frequent (at least from where I was at the time), different on the coast I
suspect. Well done Met Office forecasters in the OPs Centre for some timely
warnings!

Will.
--

"Will Hand" wrote in message
...
0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was 41
knots (49 mph). I did say I expected the strongest wind to be on the front.
This
is my highest recorded gust so far. I am relieved to say that there has been
no
damage to the house as far as I can tell. That was higher than expected as I
am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.
--
------------------------------------------------------------------------------
-
A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet).

mailto:
www: http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm

DISCLAIMER - All views and opinions expressed by myself are personal
and do not necessarily represent those of my employer.
------------------------------------------------------------------------------
-

Haytor 03/12/06 (phew!)
 

"Ken Cook" wrote in message
oups.com...

Will Hand wrote:
0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a
massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was
41
knots (49 mph). I did say I expected the strongest wind to be on the front.
This
is my highest recorded gust so far. I am relieved to say that there has been
no
damage to the house as far as I can tell. That was higher than expected as I
am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.

Hi, Will,

I'm a bit confused with this. My Met O Observers Handbook states that
only mean windspeed should be adjusted to an effective height of 10
metres. Gusts should be reported as read with no alteration.
Has this changed and am I living in the past yet again?
49mph gust at 9 metres agl here, so nothing special yet.


Ken, you may be right I'm not that well up on observing regs as I am not an
official site. However, I have corrected the gusts in the WRs as it seems
scientifically sensible to do so in order to compare with others. I admit that
correcting is not perfect and one day I shall have an anemometer at 10 metres,
then all doubt will be removed.

Cheers,

Will.
--

Haytor 03/12/06 (phew!)
 

Will Hand wrote:
0930
massive gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was 41
knots (49 mph).

Will

You sure about those kn to mph conversions?

My quick method is knots figure add a tenth then add half that tenth,
ie approx for x1.151
(6075 feet/5280 feet)

Doesn't alter the fact that you've had some 'Dave Wheeler' gusts!

Karl, Orkney

Haytor 03/12/06 (phew!)
 

"Karl Cooper" wrote in message
ups.com...

Will Hand wrote:
0930
massive gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre
gust was 41
knots (49 mph).

Will

You sure about those kn to mph conversions?

My quick method is knots figure add a tenth then add half that tenth,
ie approx for x1.151
(6075 feet/5280 feet)

Doesn't alter the fact that you've had some 'Dave Wheeler' gusts!

Karl, Orkney


Thanks Karl, that'll teach me to try and do it in my head when I'm all excited!
68 knots, is of course 78 mph.

Will.
--

Haytor 03/12/06 (phew!)
 

03/12/2006 11:47:45
Ken Cook wrote in message
.com

Will Hand wrote:
0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees
and a massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre
gust was 41
knots (49 mph). I did say I expected the strongest wind to be on
the front. This
is my highest recorded gust so far. I am relieved to say that
there has been no
damage to the house as far as I can tell. That was higher than
expected as I am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.

Hi, Will,

I'm a bit confused with this. My Met O Observers Handbook states
that
only mean windspeed should be adjusted to an effective height of 10
metres. Gusts should be reported as read with no alteration.
Has this changed and am I living in the past yet again?
49mph gust at 9 metres agl here, so nothing special yet.

Ken
Copley, nr Barnard Castle, Teesdale, County Durham
http://copley.mysite.orange.co.uk
Several decades ago (pre full wind installation on 10 metre tower) I
was using a had-held anemo here on Fair Isle. Instructions were to
add 33% to mean readings but NOT gust values - to correct to the 10
metre value. This caused much confusion at times - especially with a
SE'ly gale (no obstructions and a smooth topographical profile so a
gust factor of just 1.2 or so) as corrected mean speed often exceeded
uncorrected gust!
Comments and suggestions to the MO elicited no (reasonable) response
back then. My main concern was the 33% correction required for the
mean value. In well exposed sites this was FAR to much. I have done
some subsequent research comparing hand-held readings to those from
the 10m anemo. This indicates that (in my situation) a 15-20%
correction should be applied and not the 33%.
Chosing the best site for a low-level anemometer is extremely
important. For example, in any wind situation, using a hand-held
(cica 2m) anemo, I can get a very wide range of values. As low as 1%
(stand in the lee of a building) to 60-80% above (look for funneling
effect) that of the 10m value when the correction for height is added.

Just a typical November day here in the far north.
F7 ESE'ly just veering SSE'ly at the moment. Max gst only 46kt (46 x
1.151=52.9 mph) earlier this morning with 38kt gst past hour. PPPP at
12z 964.2 hPa, ppp -4.8 last 3hr.
Not so good on the sea though with extremely rough conditions
persisting. Last time our boat managed it across to the Shetland
mainland was 12 days ago. Luckily we managed to get a few essential
supplies in by air last week - fresh fruit. Keep scurvy away? No -
included lemons for the G&Ts! Mind you ... were rapidly running out
of beer as well as other 'essential' (liquid) supplies!!
Dave
Fair Isle

[WR] Haytor 03/12/06 (phew!)
 

For heavens sake Will, if you need warning of last nights events I suggest
you move pronto. You will have worse without doubt. It was nothing special
over the south, even the southwest, and was massively overhyped. When the
equivalent of Oct 87 or some of the early 90's storms are threatening the
southeast again, nobody will be taking any notice of the warnings. I'm not
blaming the Exeter forecasters: the Met Office early warning had only 40%
risk for the SE - but that was not the way it was portrayed by the weather
presenters.


wrote in message
...
0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a
massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was
41
knots (49 mph). I did say I expected the strongest wind to be on the
front. This
is my highest recorded gust so far. I am relieved to say that there has
been no
damage to the house as far as I can tell. That was higher than expected as
I am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.
--
-------------------------------------------------------------------------------
A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet).

mailto:
www:
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm

DISCLAIMER - All views and opinions expressed by myself are personal
and do not necessarily represent those of my employer.
-------------------------------------------------------------------------------

[WR] Haytor 03/12/06 (phew!)
 

On Sun, 3 Dec 2006 09:35:31 -0000, "Will Hand"
wrote:

0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was 41
knots (49 mph). I did say I expected the strongest wind to be on the front.

Yes indeed Will, you did say that (well "just ahead of" are the words
I remember). The analysis shows the front reaching the Isle of Wight
and Southampton at 6 am and I see Solent MRSC had a highest mean wind
speed of 48mph and a gust of 69 mph at... 6 am. I have no outside
fixed anemometer myself.

I can confirm the effects of this (from 5 miles away) as I was awoken
by a huge crash outside as my high gate burst open, sending the
wheelie bin spinning across the garden. Walking outside in the dark to
see what happened was a bit scary and probably wasn't very sensible!

Oh look, there's been another 51mph (G69) at Solent at 2pm - thiings
are livening up nicely again!

Dave
Fareham (West)

[WR] Haytor 03/12/06 (phew!)
 

Re other thread.

After some work, some thought, and looking at other data/damage in area etc I
have revised my 10m gust estimate downwards to 57 knots or 65 mph (still a
personal high) .
41 knots at 3m measured (previous highest was 32 knots).

Cheers,

Will.
--

"Will Hand" wrote in message
...
0930

What a night.
Front came through at 0415 with a temperature drop of 3 degrees and a massive
gust of 68 knots (81 mph) calculated at 10m agl, recorded 3 metre gust was 41
knots (49 mph). I did say I expected the strongest wind to be on the front.
This
is my highest recorded gust so far. I am relieved to say that there has been
no
damage to the house as far as I can tell. That was higher than expected as I
am
fairly sheltered from the south. Rainfall 30 mm BTW.

Will.
--
------------------------------------------------------------------------------
-
A COL BH site in East Dartmoor at Haytor, Devon 310m asl (1017 feet).

mailto:
www: http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm

DISCLAIMER - All views and opinions expressed by myself are personal
and do not necessarily represent those of my employer.
------------------------------------------------------------------------------
-