A frosty week ahead
THE Southern Downs saw a cool, frosty weekend but the days were perfect. Saturday had a low of 0.5 degrees and light winds from the WSW. Sunday saw widespread frosts across the region but turned out nice and sunny. Sunday a low of -0.3 degrees was recorded and a light WNW breeze blew once again. The high was the main influence and that kept the Downs and most of Queensland fine.
Today the high should move over eastern Australia. It should be fine and sunny with dry southwest winds. Widespread frosts can be expected over the region with -1-20 degrees.
Tuesday will see the high stall over the state and this will bring another fine day and moderate westerly winds. A cold morning with extensive areas of early frost can be expected. There is a slight chance of some high cloud developing during the afternoon. It will be 1-20 degrees.
Wednesday, a surface trough may develop and increase the cloud. There is a very slight chance of a shower or two in the evening. Frost is expected in low-lying areas with 3-21 degrees.
Thursday will be back to clear weather with a cool morning and light winds from the SW as the trough moves offshore and another high starts to dominate the east of the country. It will be 3-20 degrees.
Friday should start out cool but be a nice day with clear skies and sunshine and light frosts in the morning.
At this stage, the weekend is looking fine and clear with cool mornings and frosts in low-lying areas.
THE height of a weather station and thermometer is essential to the accurate data collection needed for weather forecasting. A thermometer should be placed between 1.2 and 2m off the ground. The distance from a building and other conditions can affect the reading you get so ideally you should place the thermometer about four times the height of the building, away from the building, in a shaded area with a grass surface. A weather station can also be placed in a Stevenson screen - a white box with louvers that protects it from radiation.
You may have noticed that it is always colder on the ground than the given air temperature and there are many factors for this. To get a predicted ground temperature you just take 3 degrees off the predicted air temperature. Hence, when it is 2 degrees air temperature it will be about -1 degree ground temperature.
"Feels like" or "apparent" temperature is what you feel on your skin at any given time. It takes into consideration the air temperature, the humidity and the wind chill factor.