Ady wrote:
Could anyone be so kind to tell me if the direction my Anemometer is
correct or not ? I mean judging by the direction of most of the wind
gusts today it looks more like SE / E but is this correct or not.

I guess the Anemometer should point south is this correct ?

Several points here Adrian. Looking at your wind direction graph for today
the direction has been between NE and SE. The anemometer may have been
wrongly set up in the first place. First of all you need to check using a
compass so that directions are known, a long stick to keep the wind vane
steady and then see how this known direction relates to what is shown on the
display. You may/may not then have to re-set the wind vane either at the
business end or by rotating the pole. All this assumes that the wind vane
is in a safe and accessible location. What you will probably find is that
the wind vane is set properly but you are experiencing the effect of urban
topography causing a channelling effect on the local wind direction. I
noticed this with my setup some time ago but despite checking all the
settings and an even higher pole I still get directions which are a little
too clockwise.
BTW you will probably need an assistant at the console end to help you with
checking/resetting, a mobile phone at each end and just make sure you don't
fall off the roof.

All the best
--
George in Epping, West Essex (107m asl)
www.eppingweather.co.uk
www.winter1947.co.uk

Ady wrote:
Could anyone be so kind to tell me if the direction my Anemometer is
correct or not ? I mean judging by the direction of most of the wind
gusts today it looks more like SE / E but is this correct or not.

I guess the Anemometer should point south is this correct ?

Several points here Adrian. Looking at your wind direction graph for today
the direction has been between NE and SE. The anemometer may have been
wrongly set up in the first place. First of all you need to check using a
compass so that directions are known, a long stick to keep the wind vane
steady and then see how this known direction relates to what is shown on the
display. You may/may not then have to re-set the wind vane either at the
business end or by rotating the pole. All this assumes that the wind vane
is in a safe and accessible location. What you will probably find is that
the wind vane is set properly but you are experiencing the effect of urban
topography causing a channelling effect on the local wind direction. I
noticed this with my setup some time ago but despite checking all the
settings and an even higher pole I still get directions which are a little
too clockwise.
BTW you will probably need an assistant at the console end to help you with
checking/resetting, a mobile phone at each end and just make sure you don't
fall off the roof.

All the best
--
George in Epping, West Essex (107m asl)
www.eppingweather.co.uk
www.winter1947.co.uk

Ady wrote:
Could anyone be so kind to tell me if the direction my Anemometer is
correct or not ? I mean judging by the direction of most of the wind
gusts today it looks more like SE / E but is this correct or not.

I guess the Anemometer should point south is this correct ?

Several points here Adrian. Looking at your wind direction graph for today
the direction has been between NE and SE. The anemometer may have been
wrongly set up in the first place. First of all you need to check using a
compass so that directions are known, a long stick to keep the wind vane
steady and then see how this known direction relates to what is shown on the
display. You may/may not then have to re-set the wind vane either at the
business end or by rotating the pole. All this assumes that the wind vane
is in a safe and accessible location. What you will probably find is that
the wind vane is set properly but you are experiencing the effect of urban
topography causing a channelling effect on the local wind direction. I
noticed this with my setup some time ago but despite checking all the
settings and an even higher pole I still get directions which are a little
too clockwise.
BTW you will probably need an assistant at the console end to help you with
checking/resetting, a mobile phone at each end and just make sure you don't
fall off the roof.

All the best
--
George in Epping, West Essex (107m asl)
www.eppingweather.co.uk
www.winter1947.co.uk

On Mon, 21 Feb 2005 18:25:01 -0000, George Booth wrote:

First of all you need to check using a compass so that directions
are known,

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

--
Cheers
Dave. pam is missing e-mail

On Mon, 21 Feb 2005 18:25:01 -0000, George Booth wrote:

First of all you need to check using a compass so that directions
are known,

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

--
Cheers
Dave. pam is missing e-mail

On Mon, 21 Feb 2005 18:25:01 -0000, George Booth wrote:

First of all you need to check using a compass so that directions
are known,

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

--
Cheers
Dave. pam is missing e-mail

On Mon, 21 Feb 2005 18:25:01 -0000, George Booth wrote:

First of all you need to check using a compass so that directions
are known,

No need for a compass, which gives you magnetic north not true north
anyway, just use the sun at midday (for south) or the sun at anytime
and point the hour hand of a proper watch at it the 12 then points
South.

--
Cheers
Dave. pam is missing e-mail

On Mon, 21 Feb 2005 22:29:31 +0000 (GMT), "Dave Liquorice"
wrote:

...just use the sun at midday (for south)...

Due to the Equation of Time, the sun can be up to 5° away from S at
midday.

--
Alan White
Twenty-eight miles NW of Glasgow, overlooking Loch Goil and Loch Long in Argyll, Scotland.
Web cam, http://www.windycroft.gt-britain.co....her/kabcam.htm
Web site, http://www.alan.lesley.ukgateway.net

On Mon, 21 Feb 2005 22:29:31 +0000 (GMT), "Dave Liquorice"
wrote:

...just use the sun at midday (for south)...

Due to the Equation of Time, the sun can be up to 5° away from S at
midday.

--
Alan White
Twenty-eight miles NW of Glasgow, overlooking Loch Goil and Loch Long in Argyll, Scotland.
Web cam, http://www.windycroft.gt-britain.co....her/kabcam.htm
Web site, http://www.alan.lesley.ukgateway.net

On Mon, 21 Feb 2005 22:29:31 +0000 (GMT), "Dave Liquorice"
wrote:

...just use the sun at midday (for south)...

Due to the Equation of Time, the sun can be up to 5° away from S at
midday.

--
Alan White
Twenty-eight miles NW of Glasgow, overlooking Loch Goil and Loch Long in Argyll, Scotland.
Web cam, http://www.windycroft.gt-britain.co....her/kabcam.htm
Web site, http://www.alan.lesley.ukgateway.net