- WEATHER
Australia
- National
- New South Wales
- Victoria
- Queensland
- Western Australia
- South Australia
- Tasmania
- ACT
- Northern Territory
Long Range Forecasts
- WARNINGS
- RADAR
- SATELLITE
- MAPS & CHARTS
- LONG RANGE
Long Range Forecasts
- CLIMATE
Climate Indicators
- NEWS
Search Farmonline Weather Help
Understanding the Weather
How do I set my barometer?
Air pressure decreases with altitude, so if you live in an elevated location you will have a lower pressure than places at sea level. The correct local pressure is called Station Level Pressure. It can?t, however, be compared with Mean Sea Level Pressure. The pressures you see on Weatherzone have all been corrected to MSLP. It is therefore most useful if you set your barometer to MSLP. You will then be able to compare your pressure with the weather charts and observations on the website.
To do this, find your current pressure on Your Local Weather Page. If there is no observation for the town in which you live, use the observation for the nearest available station. Set your barometer to the pressure given. You will be able to move the pointer with a screw in the back of the barometer. It is not the pointer at the front that you want to move.
Check your barometer 24 hours later against the observations to ensure that it has remained calibrated. It should only need to be adjusted by a small amount, if at all. Regularly check your barometer against the official readings provided on the website. You should generally do this during periods of stable weather when the pressure is not changing rapidly.
Related Articles
- What is the Southern Oscillation Index?
- What is the Nino3.4 Index?
- What time do the maximum and minimum temperatures refer to?
- Where do the background maps come from in your charts and how is the data turned into graphics?
- Who gives you the information used in your weather charts?
- What does wind chill mean?
- What is relative humidity?
- What is feels like temperature?
- How is the UV index measured?
- How are sunrise and sunset times measured?
- How is rain measured? How is snow measured? How do you calculate the water equivalent of snow?
- What are common sources of errors in measuring precipitation?
- What is the dew point?
- Why is wind not always included in the forecast?
- When you talk of a north or northerly wind, do you mean that the wind blows from the north or towards the north? Is this the geographic north of the magnetic north?
- How is a weather forecast made?
- What is the difference between a tropical cyclone, a hurricane and a typhoon?
- Do you have an explanation of the terminology you use in weather forecasts?
Enter a postcode or town name for local weather, or text to search the site. » advanced search
Satellites capture huge dust storm crossing Mediterranean Sea
14:32 AEST Images captured from satellites have revealed the colossal scale of a dust storm that turned the sky orange in parts of Greece earlier this week.
- 08:00 AEST A digger's letter from snowbound Gallipoli
- 15:39 AEST Summery Sydney, wintry Melbourne
- 13:00 AEST Rainfall to soak some parched areas of WA
- 10:33 AEST Tassie snow, Melbourne temps go low
Help with Farmonline Weather
