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Weather News - Western NSW feeling the heatBrett Dutschke, 21 October 2014
Much of western New South Wales has begun a heat wave, reaching at least five degrees above average for at least five days, averaging a maximum of 35 degrees or more.
The hottest area between last Monday and next Monday will be west and north from about Wyalong, Hillston, Condobolin, Trangie where maximum temperatures will average 35-to-40 degrees, 10 degrees above the October average and close to October records.
Very little or no cooling is likely north and west from Broken Hill to Bourke with the temperature reaching the high thirties and low forties by early next week just ahead of a cooler change. With temperatures rising from the mid thirties to the high thirties and low forties heat-related stress is possible. Thankfully, most nights will cool down to a comfortable level, providing some temporary recovery.
Another form of recovery will be showers and thunderstorms which have potential to cool by more than 10 degrees for an hour or so.
The showers and storms will develop in the west on Wednesday then mainly on the slopes, ranges and coast almost every day through to early next week.
Some places may pick up more than 30 millimetres from multiple showers and storms and cool down significantly a few times between now and early next week.
The early-season heat has been brought about by a reduction in the strength of cold fronts over Western Australia this month, allowing heat to build over the Pilbara and Kimberley with help from sunnier than normal days. The heat has been allowed to exceed average levels with the aid of a warmer-than-normal sea surface surrounding western, southern and southeastern Australia.
In the east of the state more significant relief from the heat will arrive on the weekend, and on the coast sea breezes will bring cooling each afternoon.
The main cool change looks like arriving next Monday and Tuesday, causing temperatures to drop by as much as 15 degrees.
© Weatherzone 2014
Weather News - Record-breaking heat wave beginning to scorch western NSWBrett Dutschke, 22 October 2014
Western New South Wales has begun a heat wave and it is likely to become record-breaking in the far west where maximum temperatures should average as much as 40 degrees over seven days.
The heat wave (reaching at least 35 degrees for at least five days in a row) should affect an area west from about Collarenebri to Trangie to Condobolin to Hillston to Hay. The area west from about Bourke, including Wanaaring and Tibooburra should average about 40 degrees over a five day period.
The week from yesterday (Tuesday) to next Monday should become the hottest October week in more than 50 years for most of the Upper Western and Lower Western, six years for parts of the Riverina, South West Slopes and Central West Slopes and Plains and five years for parts of North West Slopes and Plains and Northern Tablelands.
In the Upper Western, Tibooburra should average about 39 degrees for seven days. In 100 years of records its previous hottest October week was in 1997 when it averaged 37.6 degrees.
This heat wave is likely to lead to dehydration, stress, possible exhaustion and significant drying out of the bush, grasslands and crops, particularly for areas which receive little or no rainfall from showers and thunderstorms.
A record past two months in the West Australian Kimberley and Pilbara has translated across central Australia to reach western NSW. This has come about with help from warmer-than-normal sea surface surrounding western and southern Australia, sunnier-than-normal days and a reduction of intensity of cold fronts. The NSW heat is being drawn across the state by a slow-moving (near-stationary at times) low pressure trough.
© Weatherzone 2014
Weather News - Sweltering conditions ahead for eastern QueenslandKim Westcott, 22 October 2014
With plenty of sunshine on the way, Queenslanders will feel the heat begin to build as a hot airmass works its way east.
For Ipswich, Beuadesert, Gatton and Gayndah the start of the run of 30 degree days will commence on Thursday. By Saturday, the mercury will be hitting the mid 30's. The scorching conditions will linger until Tuesday.
About the coast, many locations including Rockhampton, Brisbane and Townsville will be basking in 30-degree heat on Saturday. For inland locations such as Longreach, Winton, Mount Isa and Boulia, Saturday will mark the beginning of a run of 40-degree days. From Monday, most of eastern QLD will be seeing the mercury rise into the mid-to-high 30's.
The heat is being caused by a long period of clear sunny days allowing heat to build in the west. Over the weekend and into next week, the high pressure ridge which keeps usually keeps coastal locations cooler due to the onshore winds will begin to break down. As a series of broad troughs develop, the winds will tend more northerly, dragging the heat into the east. These low pressure troughs also bring the risk of thunderstorms and showers, which may provide some temporary relief from the afternoon heat.
A change in the sweltering conditions for the southern and eastern parts of QLD is not expected until Tuesday evening or Wednesday morning when a cooler airmass from the south flushes the heat further north and the high pressure ridge rebuilds again.
© Weatherzone 2014