Observations and Data

Weather and climate data sources and resources to support schools making their own observations.

 

Other Useful Links

Contour Drawing

If you’ve ever looked at an Ordnance Survey Map, you’ll have seen the contours – lines joining places which are the same height above sea level. You can spot high places, low places and places where the slopes are steep. The contours are drawn at equal intervals – there might be one every 5m or 10m.

But contour maps are useful for many things other than height. In meteorology, isobars link places where the atmospheric pressure is the same, we use isotherms for temperature, isotachs for wind speed and isohyets for rainfall.

How do you go about creating a contour map from a set of observations? 

Here are a few practise resources:

Isotherm and Isobar drawing exercise based on a depression: student worksheet. A simpler version of the T/ isotherm map can be found here or a complete depression based exercise where students draw contours of temperature, pressure and precipitation to work out what the system looks like: Student worksheets and
notes for teachers.

Urban heat island isotherm drawing exercise:notes for teachers, idealised weather station data for isotherm drawingsatellite image of Birmingham and solution for teachers.

Interpreting isotherms

Drawing isolines on WOW data from depression EVA

Isoline mapping Exercise

Isotherm – Notes for Teachers

Other Useful Links

A beginners Guide from the Ordnance Survey.

Weather Stations

Automatic Weather Stations

An automatic weather station usually consists of a number of outdoor weather sensors which communicate with a display unit indoors, which can in turn often be linked into a PC to store and display data. The link between the instruments outdoors and the display inside can be wireless, although the range will be 100m at best.

A weather station for your school – guidance for setting up a school weather station: Why you need one; what to buy; where to put it; what to do with the data.

What can I use my school weather station for?

If you would like to submit high quality weather observations to a UK network, try the Met Office Weather Observations Website or COL.

Some specific lesson ideas:

Several resources at all levels based on using weather station data from the WOW website

KS2/3 science: Use automatic weather station data together with the Met Office resources to study the difference between day and night and to look at the seasons .

KS3/ 5 geography or maths: Use automatic weather station data to see whether there is a relationship between air pressure and rainfall amount. Does most of our rainfall in the UK occur when the pressure is low?

KS 4/5 geography, science or maths: Does it rain more at weekends? An experiment trialled at Manchester Science Festival

KS3/ 4 science or geography: fieldwork ideas for teachers and students Red sky.pdf with an introductory concept cartoon from the ASE.(The full workbook may be purchased at http://www.amazon.co.uk/Edexcel-Level-Projects-Student-Extended/dp/1846903645)

KS3/ 5 geography: look at the current wind speed and direction (you could also use WOW data for this). How do they relate to the orientation and spacing of the isobars on the current analysis chart? This could be used in conjunction with the introduction to weather maps.

What are other schools using their weather stations for?

Have a look at the websites of
Pitsford Hall school weather station
Reigate Grammar School 
Maiden Erlegh School

London grid for learning together with curriculum links

Why have an automatic weather station?

There are many advantages to an automatic weather station. Weather observations can be made more quickly and conveniently. The sensors can be placed well out of the way and reduce the chances of vandalism – and (in the case of wind measurements, for example) in a better exposed location than would be possible with manual instruments. With a PC link, the data can be used for all sorts of projects, from simple averaging ones to looking at correlations between different measurements such as wind direction and temperature. The main disadvantage of an automatic weather station is that it removes the observer from the real elements being measured, and so the experience of what -5ºC temperatures or 30 knot winds feel like, is lost.

Beaufort Scale

Beaufort wind scale for land areas

  • Make your observations in an open location, e.g. school field.
  • Use the scale below to estimate wind speed.
  • Enter CALM if there is no wind.
Wind Force
Description
Speed
Specifications
kph
knots
0Calm00Smoke rises vertically
1Light Air1-51-3Direction shown by smoke drift but not by wind vanes
2Light Breeze6-114-6Wind felt on face; leaves rustle; wind vane moved by wind
3Gentle Breeze12-197-10Leaves and small twigs in constant motion; light flags extended
4Moderate Breeze20-2811-16Raises dust and loose paper; small branches moved.
5Fresh Breeze29-3817-21Small trees in leaf begin to sway; crested wavelets form on inland waters.
6Strong Breeze38-4922-27Large branches in motion; whistling heard in telegraph wires; umbrellas used with difficulty.
7Near Gale50-6128-33Whole trees in motion; inconvenience felt when walking against the wind.
8Gale62-7434-40Twigs break off trees; generally impedes progress.
9Strong Gale75-8841-47Slight structural damage (chimney pots and slates removed).
10Storm89-10248-55Seldom experienced inland; trees uprooted; considerable structural damage
11Violent Storm103-11756-63Very rarely experienced; accompanied by widespread damage.
12Hurricane118 plus64 plusDevastation
MetLink - Royal Meteorological Society
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