This is intended to give some basic information about the effect of atmospheric pressure on the weather to enable users of Meteormetrics instruments to interpret usefully the data they provide.
Isobaric Charts for Europe & the British Isles:
Sites which give weather conditions and barometric pressures
for locations in the UK:
General weather sites
http://www.metoffice.com/ (UK Meteorological Office)
http://www.nws.noaa.gov/ (US Weather Service)
http://www.bbc.co.uk/weather/ (BBC Weather Service)
http://www.royal-met-soc.org.uk/ (Royal Meteorological Society)
Admiral Fitzroy was the first to attempt systematic weather forecasting and the first to publish a weather forecast in the London Times in 1860. He was appointed Head of Meteorology at the Board of Trade and using the burgeoning science of telegraphic communication, began to gather meteorological information from different locations to enable more precise forecasting.
Barometers bearing his name found their way into many Victorian households and his Remarks printed thereon enabled the user to make his own weather forecasts. They are reproduced here because, in the UK, they still provide essentially sound advice for interpreting barometric information. They also form the foundation of the Zambretti Forecasting algorithm which is used in the Meteor2000D & Meteor2000WX instruments
1. A steady rising barometer which when continued shows very fine weather.
2. In winter, the rise of the barometer presages frost.
3 In wet weather, if the mercury rise high and remain so, expect fine weather, but if the mercury rise suddenly very high, fine weather will not last long.
4. A rapid rise in the barometer indicates unsettled weather, a slow movement, the contrary.
NB: the barometer rises highest of all for north and east wind.
1. If a fall takes place with a rising thermometer, wind & rain may be expected from the south-eastward, southward or south-westward.
2. A fall with a low thermometer foretells snow or rain.
3. A sudden fall of the barometer with westerly wind is generally followed by a violent storm from the north-west or north-east.
4. A rapid fall indicates wind or wind with rain.
5. In very hot weather, the fall of the mercury denotes thunder or a
sudden fall indicates very high wind.