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Weather News - NSW foggy facadeGuy Dixon, 30 July 2016
Parts of New South Wales woke to a blanket of low cloud and fog this morning, reducing visibility dramatically.
The Slopes and Tablelands were worst affected with visibility being limited to less than 50m at Armidale and Lismore and 100m at Moree. Meanwhile, Orange turned to white as residents struggled to peer more than 150m.
Closer to the coast, Grafton, Port Macquarie and parts of Great Sydney saw patchy fog, while locations west of the ranges included Tamworth, Walgett and Corowa.
Calm conditions beneath a high pressure ridge can be held responsible for this fog event, with clear skies allowing cool air to settle close to the Earth's surface. Moisture in the air cool and condensed as a result, allowing fog and low cloud to form.
As the sun came up and the temperature rose, the droplets in the air re-evaporated or 'burnt off' revealing a beautiful blue sky day.
Fog remains a risk early hours of the coming mornings preceding a gusty front early next week.
© Weatherzone 2016
Weather News - Cut-off low on the cards for east coastGuy Dixon, 29 July 2016
Southeastern Australia is in for a wooly few days next week as forecast models begin to jump on the cut-off low bandwagon.
A strong cold front is due to sweep over southeastern Australia early next week generating strong winds, widespread rainfall and a significant drop in temperatures.
Tuesday looks to be the day of most noticeable change, with a drop of 4-7 degrees across the nation's east in comparison to the previous day, accompanied by strong winds and widespread rainfall.
Eastern and northern parts of Victoria and southwestern parts of New South Wales look to collect the most significant rainfall totals on Monday as the front approaches, where upwards of 50mm have the potential to fall.
As the system traverses east on Tuesday, up to 30mm may collect over southern and eastern parts of NSW and eastern VIC.
It's at this stage where things have the potential to get interesting with increasing model consensus of a developing cut-off low over the Tasman Sea.
In this instance, we could be in for a run of prolonged wet and windy conditions along the eastern seaboard, accompanied by an increase in swell. At this stage, the centre of the low looks to be positioned off the Eden Coast, placing the main swell generating fetches over land.
As a result, the initial outlook of a strong southerly groundswell looks limited, however these systems are notoriously dynamic and if this low were to be positioned a few hundred kilometres further east, swell generation could be rapid.
© Weatherzone 2016
Weather News - NSW's Riverina sees a wet and warm monthKim Westcott, 30 July 2016
For the Riverina area, July turned out to be consistently wet and warm.
Throughout the district, all locations experienced above average July rainfall. Some places such as Hay, Griffith and Wagga Wagga saw well over one-and-a-half times their monthly average.
For Griffith, July usually has ten rain days bringing 33mm of rain. This July, Griffith recorded 18 rain days, bringing 60mm of rain. It was a similar story in Albury, with an additional seven rain days, helping Albury record their wettest July in over two decades. Wagga Wagga had an extra five days of rain days, helping it have the wettest July since 1995.
This surplus of rain throughout the region was a result of a steady supply of rain-bearing cold fronts this month. As a result, mornings were warmer-than-average thanks to the addition of cloud that these fronts generate, essentially acting like a blanket.
At Wagga Wagga, mornings averaged three degrees warmer than the norm this month, giving it the title of third warmest July mornings in records dating back to 1871. It was a similar story across the Riverina, with Albury, Deniliquin, Narrandera recording their warmest July mornings in a decade or more.
Into August, this pattern looks to continue. The outlook for central and eastern parts of the state, including the Riverina, is likely to have at least average monthly rainfall and a high chance that mornings will remain warmer than average.
© Weatherzone 2016