 [For Monthly Weather Statistics 2008 Click Here]
[For Weekly Weather Statistics 2007 Click Here]
[For Weekly Weather Statistics 2006 Click Here]
[For Weekly Weather Statistics 2005 Click Here]
[For Weekly Weather Statistics 2004 Click Here]
[For Weekly Weather Statistics 2003 Click Here]
|
Max Yearly Stats |
Temperature (C) |
Total Rainfall (mm) |
| Max |
Min |
| 2007 |
00/00/0000
00.0 |
00/00/0000
00.0 |
0000.0 |
| 2006 |
22/07/2006
33.5 |
04/03/2006
-6.0 |
1670.3 |
| 2005 |
16/07/2005
30.5 |
31/12/2005
-6.5 |
1373.5 |
| 2004 |
19/06/2004
29.0 |
06/03/2004
-4.0 |
1762.9 |
2003 |
19/07/2003
31.0 |
19/01/2003>
-5.5 |
1256.2 |
To view photos in 500 X 300 format Click Here
Bridge over the stream top side of lower lake
Mist rolling down the valley
Storm coming (looking north)
High winds causing stratus cloud to fold over its self (Mammatus)
cumulonimbus cloud
Rainbow
Cirrus
Altocumulus translucidus
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"Weather".......... what is this page all about I hear you ask and what has it to do with Cwmtillery!
Well I suppose we all
take the weather as wet, dry, warm or cold but it effects our lives each and every day (umbrella or sunhat........tee shirt or overcoat .........BBC1 or ITV
and so on).
So for those of you that like pictures, most of these have a weather theme and have been taken around the valley area.
If, like me your interested in finding out more about the weather, what makes it tick, measuring
instruments, cloud types and other facts, I have placed a few below
 In the Sky
The first weather satellite was launched in April 1960 and provides information about movement and locations of weather systems. There are
two types of satellite providing data geostationary and polar orbiting.
Geostationary Orbits at a height of approx 36,000 km above the earth, this Meteosat satellite orbits over the equator will
appear to 'hang' over the same spot on the earth's surface all the time. Pictures from this satellite include the North Atlantic and Europe every 1/2
hour and images of the half globe every hour.
Polar-orbiting NOAA's, passes over the earth from pole to pole at an orbit height of approx 900km and takes 1hour 42
minutes to complete one orbit.
With the rotation of the earth this means the UK receives a set of three different images twice a day, from each
satellite. The first pass is over the eastern Mediterranean, the second over Cwmtillery (sorry I mean the UK), and the third over the eastern Atlantic.
On the ground Along with Met Office staff at various locations in the UK are a large number of stations run voluntarily by
private individuals ( could be your neighbor ) other industrials concerns and educational and research establishments. Weather observations are be made
regularly at fixed times each day by trained observer, using accurate instruments of standard design. This information is then received by the MET
office and analysed by computer Only then can we compare reports from stations in the UK and overseas.
What is Observed at approx 500 UK stations? Rainfall, temperature, humidity, wind speed/direction, cloud amount, visibility, ground
state and sunshine, solar radiation and run-of-wind.
So information from satellite and volunteers, pasted onto the MET office then Michael Fish and finally the TV,
easy.
The Stevenson screen usually contains 4 thermometers, wet, dry, maximum and minimum.
 Aneroid Barometer a device used to measure atmospheric pressure. The barometer uses an aneroid, a flexible metal chamber
that expands and contracts with change in air pressure.
Table of cloud height and Latin name
Low Clouds
Surface to 7000ft |
Medium Clouds
7000 to 17000ft |
High Clouds
17000 to 35000ft |
| CUMULUS |
ALTOCUMULUS |
CIRRUS |
| CUMULONIMBUS |
ALTOSTRATUS |
CIRROSTRATUS |
| STRATUS |
NIMBOSTRATUS |
CIRROCUMULUS |
Facts
Frontal Systems Clouds form when advancing warm air slides over cold air or when advancing cold air pushes under
warm air.
Cumulonimbus Clouds Develops when the temperature inside the cloud is warmer than the temperature outside, allowing
rising air currents to become strong. Once these air currents reach a height where the temperature inside and out approaches an equilibrium vertical motions
weaken and horizontal dominates, this causes the ANVIL shape to form.
Clouds
Are made from Water and Ice and are formed under the same circumstances, by the cooling of air or adding of water vapor.
Mammatus Are hanging protuberances or pouches formed on the cloud underside, these upside down looking cumulus clouds signify places
where air in the upper portions of the thunder storm is sinking.
Rainbow Primary and Secondary
for a rainbow to be seen, the sun must be low in the sky behind the observer and rain falling on the opposite side of the sky. It is caused
when sunlight ( and moonlight ) enters a raindrop where it is refacted (bend) as it passes from air into water. Inside the raindrop, it is separated into
colors of the spectrum and produces a rainbow at 42 degrees, some sunlight can be reflected again off the back surface before it exit the raindrop causing the
secondary rainbow at 51 degrees.
Earth's Axis
The earth's axis is tilted by 23.5 degrees and it is this angle coupled with the annual orbit, that exposes different sections
of the Earth's surface to the sun and brings about seasonal change.
How far away is the Lightning
Count the seconds between the lightning strike and the thunder clap. Divide the number of seconds
by five and that's the distance of the lightning in miles, (divide by three for
lilo-meters). If you don't hear the thunder clap, it means that the lightning
is more than about fifteen miles (25 km) away.
To view this photo in 500 X 300 format Click image
Icicles in stream above top reservoir
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Home
Earth's climate has been changing ever since the planet first formed, with weather records being
written, as far back as 340BC by a Greek philosopher "Aristotle".