Pz Forecast - Fog, 15mph wind & good visibility - forecast simultaneously
 

A bit of a classic - see Tues http://www.metoffice.gov.uk/public/w...ime=1443916800

I think 80% humidity is a bit low for a fog warranting a warning as well.

I know how these 5 day absurdities are arrived at, but they make post code forecasts & joke.

I remember Camborne reporting fog all day & being the sunniest place in the country, the dreaded fog in the vicinity syndrome, in this case a couple of miles offshore.

Graham
Penzance

Pz Forecast - Fog, 15mph wind & good visibility - forecast simultaneously
 

On Saturday, October 3, 2015 at 9:36:15 PM UTC+1, Graham Easterling wrote:
A bit of a classic - see Tues http://www.metoffice.gov.uk/public/w...ime=1443916800

I think 80% humidity is a bit low for a fog warranting a warning as well.

I know how these 5 day absurdities are arrived at, but they make post code forecasts & joke.

I remember Camborne reporting fog all day & being the sunniest place in the country, the dreaded fog in the vicinity syndrome, in this case a couple of miles offshore.

Graham
Penzance

Tues should read Sunday - my watch is a bit fast.

Graham
Penzance

Pz Forecast - Fog, 15mph wind & good visibility - forecast simultaneously
 

"Graham Easterling" wrote in message
...
A bit of a classic - see Tues
http://www.metoffice.gov.uk/public/w...ime=1443916800

I think 80% humidity is a bit low for a fog warranting a warning as well.


There must be a coding error. When I left post-processing the code said that
if the presenet weather algorithm gave fog then the humidity forecast was
corrected to 95%. Perhaps someone has been fiddling?

I know how these 5 day absurdities are arrived at, but they make post code
forecasts & joke.


They are if you take them literally, sadly that is what a lot of people do,
well what did they expect?
Planners were told at the time by myself and a few others, but the "design"
was set, the design made by non-forecasters of course.

I remember Camborne reporting fog all day & being the sunniest place in
the country, the dreaded fog in the vicinity syndrome, in this case a
couple of miles offshore.

The software does know about fog in the vicinity, unless somebody has been
fiddling?

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
---------------------------------------------

Pz Forecast - Fog, 15mph wind & good visibility - forecast simultaneously
 

On Sunday, October 4, 2015 at 8:47:08 AM UTC+1, wrote:
"Graham Easterling" wrote in message
...
A bit of a classic - see Tues
http://www.metoffice.gov.uk/public/w...ime=1443916800

I think 80% humidity is a bit low for a fog warranting a warning as well.


There must be a coding error. When I left post-processing the code said that
if the presenet weather algorithm gave fog then the humidity forecast was
corrected to 95%. Perhaps someone has been fiddling?


I rather thought it was due to the warnings being produced independently of the 5 day forecasts?

For what it's worth, the fog warning is still in place for Penzance @ 10:00, combined with a forecast 77% humidity and a SE wind gusting 25mph. In practice with increasing dewpoints and strengthening wind there is mistiness over the hills,generally good visibility at lower levels.

I know how these 5 day absurdities are arrived at, but they make post code
forecasts & joke.

They are if you take them literally, sadly that is what a lot of people do,
well what did they expect?

I think at one time the ordinary person thought they might be correct!

Planners were told at the time by myself and a few others, but the "design"
was set, the design made by non-forecasters of course.

I remember Camborne reporting fog all day & being the sunniest place in
the country, the dreaded fog in the vicinity syndrome, in this case a
couple of miles offshore.

The software does know about fog in the vicinity, unless somebody has been
fiddling?

Well, I was given the 'fog in the vicinity' reason, and I have read similar comments on this subject on USW. Certainly far from a 1 off for Camborne to report fog when the only fog is nearby sea fog.

Mind you, I was always told (by the MetO) that Scilly occasionally reporting a whole sun when it was typical warm front/low sector weather and raining, was down to the low cloud base. A feature of the system used apparently. This may well be the case, but it doesn't inspire confidence.

Lucky we have rain radar, satellite imagery & webcams!
http://www.scillyman.co.uk/Lowertown_Cam.html

Graham
Penzance