2010 Among Australia's Wettest On Record

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2010 Among Australia's Wettest On Record

Postby @weather_wa » Wed Jan 05, 2011 2:14 pm

2010 among Australia's wettest on record:

Australia recorded its third wettest year on record in 2010, with 11 months of above-average rainfall soaking the east of the country because of the La Nina weather system.

The Bureau of Meteorology's annual climate statement says the sequence of below-average-rainfall, which began in 2001, has been broken.

The bureau says the Murray-Darling Basin recorded a dramatic recovery in its wettest year on record, with water storages across the basin at 80 per cent at year's end, up from 26 per cent at its beginning.

The bureau's report on 2010 also reveals that:Australia recorded its wettest year since 2000Mean total rainfall was 690mm, well above the long-term average of 465mmMean temperatures were cooler than those for the previous eight yearsSea surface temperatures were 0.54 degrees Celsius hotter than the 1961 to 1990 average.

The bureau says the "long dry" which began in late 1996 in the Australian mainland's far south-east and late 2001 across much of the Murray-Darling Basin has "effectively ended".

Queensland recorded its wettest year on record in 2010 while it was the third wettest in the Northern Territory, New South Wales and South Australia.

Victoria experienced its fifth wettest year on record.

However, not all areas were very wet last year, with Western Australia's south-west recording its driest year and Tasmania having near to average rainfall.

David Jones, from the National Climate Centre, says the La Nina caused major flooding across parts the country.

"It really has been a year of extremes, with the two major hailstorms in Sydney and Perth and then most recently the very severe floods that we're seeing in Queensland at the moment," he said.

The Bureau of Meteorology says the mean rainfall total in Australia for 2010 was 690 millimetres compared to the long-term average of 465 millimetres.

Meanwhile, mean temperatures in 2010 were cooler than those for the previous eight years, with an average of 22.0 degrees Celsius, 0.19C above the 1961 to 1990 average of 21.81C.

But despite the wet year, the bureau says the decade ending in 2010 was the hottest since records began more than a century ago.

It says Australia's climate continues to warm even though individual years may buck this trend.

Meanwhile, sea surface temperatures in the Australian region during 2010 were 0.54 degrees Celsius above the 1961 to 1990 average, though data was only available to November 30.

The bureau says the past decade was also the warmest on record for sea surface temperatures.
Last edited by @weather_wa on Wed Jan 05, 2011 2:18 pm, edited 2 times in total.

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Re: 2010 The Wettest Year On Record

Postby @weather_wa » Wed Jan 05, 2011 2:15 pm

Canberra records 4th wettest year:

2010 was the wettest year in the ACT since 1974.

According to the Bureau of Meteorology, just under 960 millimetres of rain was recorded at Canberra Airport over the year - well above average and the fourth highest total on record.

The single wettest day was December 3, when 87 millimetres fell - the highest daily total since 1995.

The bureau says the high rainfall was the result of a strong La Nina event, which developed through the spring.

The rainfall total was more than double that recorded in 2009.

Canberra's temperatures were less than exceptional though.

While the daily average temperature of 20.3 degrees Celsius was half a degree higher than the historical average, temperatures were significantly cooler than in 2009.

The highest temperature of the year - 39.8 degrees - was recorded on January 12, and there were only seven other days over 35 degrees.

The coldest day and night were both recorded on August 25. The temperatures fell to minus 7 on Mount Ginini in the early hours and only rose to minus 3 during the following day.

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Re: 2010 The Wettest Year On Record

Postby @weather_wa » Wed Jan 05, 2011 2:16 pm

2010 wettest year for parts of SA:

The weather bureau says 2010 was South Australia's third wettest year since records were first kept.

Some towns set new records, with minder in the state's north-east recording close to double its average annual rainfall.

Darren Ray from the climate section says 2010 contrasted dramatically with 2009 when South Australia had its warmest year on record.

"The La Nina event that we've seen through a fair bit of 2010 is actually expected to break down over the next few months," he said.

"We will go back to some sort of situation that's a little bit more like what we've seen over the last 10 or 15 years."

Last year Adelaide received 593 millimetres of rain, 44 millimetres above average and 76 millimetres more than the previous year.

Adelaide's coldest maximum was 11.5 degrees Celsius in June after a hottest day of 42.8 C in January, while the average maximum and minimum temperatures were cooler than in 2009.

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Re: 2010 Among Australia's Wettest On Record

Postby @weather_wa » Wed Jan 05, 2011 2:18 pm

Melbourne's wettest year since 96:

For the last 14 years, Melbourne has not exceeded the average annual rainfall of 649mm, but 2010 brought a soggy end to the dry spell with 776mm, just short of the 1996 total of 777mm.

This past year Melbourne picked up more than double the record lowest annual rainfall of 1997, which only received 360mm. The city was still a far way from seeing their wettest year though, 1916 holds the record annual rainfall of 967mm.

Through the year Melbourne had seen multiple northwest cloud bands, fed by the warm water in the Indian Ocean, which brought some heavy rain. La Nina was also a player in the wet year, feeding high amounts of moisture over eastern Australia.

Despite higher rainfall, maximum temperatures in 2010 did not suffer. The average for the year was 21 degrees, just over the long term annual average of 20 degrees. The minimums came out at 12 degrees, which is two above the long term average.

For the start of 2011, Victorian rainfall will hold close to the median rainfall driven by the continuing La Nina event and warm oceans to the north. As we move out of Melbourne's drier months and into winter, rainfall will tend closer to average

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Re: 2010 Among Australia's Wettest On Record

Postby @weather_wa » Wed Jan 05, 2011 2:19 pm

Brisbane soaks in wettest year since 1974:

Brisbane saw drenching rain in the second half of 2010, leading to an annual total of 1659mm and the wettest year since 1974.

The high rainfall totals were a result of the current La Nina pattern, which began to ramp up from October of 2010. During a La Nina pattern the easterly trade winds strengthen over the Pacific, directing high amounts of moisture over eastern Australia.

This year, the sea surface temperatures over the Coral Sea were also higher than average, supplying more moisture to the dominant easterly winds that then fed into Queensland.

In December alone, Brisbane had received 480mm, making it one of the wettest months on record. As a result of the cloud and rain, the maximum temperatures averaged 28 degrees in the month, which is nearly two degrees below average.

Overall, the maximum temperature in 2010 averaged 25.8 degrees, which is around a degree below the long term norm of 26.6 degrees. Overnight temperatures remained slightly above the average of 16.2 degrees due to the increased cloud cover.

For 2011, rainfall totals are expected to remain above average during the remainder of summer, but from March conditions should tend closer to average.

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Re: 2010 Among Australia's Wettest On Record

Postby @weather_wa » Wed Jan 05, 2011 2:21 pm

NSW had its wettest year in 50 years:

NSW had its wettest year in half a century in 2010 as cold ocean temperatures caused heavy rain which broke the drought.

The weather bureau said the state's wet conditions were the result of a "very strong" La Nina event in the Pacific Ocean, in combination with a negative Indian Ocean Dipole event, a sea-surface temperature phenomenon.

Spring 2010 was the wettest on record for both NSW and Australia, the Bureau of Meteorology said.
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NSW recorded 803.14mm of rain during the year, well above the average of 559mm, which made it the third wettest year on record.

However, the heavy rainfall did break the long-term drought in southeastern Australia.

No part of NSW was declared in drought or marginally in drought by December 2010, the bureau said.

On the other hand, several major floods occurred during the year, mostly impacting southern NSW.

Sydney experienced temperatures above average for the 18th year in a row.

The city had its wettest year since 2007, recording a total annual rainfall of 1153.8mm during 2010, slightly below the historical average of 1214mm.

Sydney's Warragamba Dam catchment received above average rainfall during the year with totals ranging from around 1100mm in the lower catchment to 889.2mm in the upper catchment.

Summer snow fell at the Snowy Mountains on January 18.

Light snow was sprinkled as low as 900 metres in the Cooma-Bombala region, the first time this has happened at this time of year since records began.

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Re: 2010 Among Australia's Wettest On Record

Postby @weather_wa » Wed Jan 05, 2011 2:23 pm

2010 Queensland's wettest year on record:

It's official: 2010 was Queensland's wettest year on record, according to the Bureau of Meteorology.

In its Annual Climate Summary released today, the Bureau of Meteorology said "exceptional" weather saw the state's average rainfall nearly double that of a normal year.

Queensland also had its wettest spring on record, as well as wettest September and December, while every month from August to December ranked in their respective top 10s.
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Climate services manager Jeff Fabburg said if the state had not had such a wet spring it might have been saved from the devastating floods of the past month.

"Having all that rain early, then going into the summer period – and the highest rainfall is traditionally January and February – that's topped up everything to the point where a lot of it is going into run off," he said.

The average annual rainfall across the state was 1109.73 millimetres in 2010, exceeding the previous record of 1103.77 millimetres in 1950. Records began in 1900.

The long term average, taken from 1961-1990, is 623.34 millimetres.

Australia-wide, it was the third wettest year on record, with the mean rainfall total of 690 millimetres well above the long-term average of 465 millimetres.

Some 77 recording stations around the state had record rainfall in 2010.

Some areas of the tropical east coast, between Cooktown and Yeppoon and along the southern Gulf of Carpentaria coast, recorded more than 1200 millimetres of rain above the long-term average.

The wettest place overall in Queensland last year was Bellenden Ker Top Station with more than 12 metres of rain - 12,438.4 millimetres - followed by Babinda Post Office with 6893.6 millimetres.

Temperatures for the year were unusually cool during the day, but unusually warm at night.

The Bureau said extensive cloud cover associated with the high rainfall had a marked effect on moderating temperatures.

The coldest night was at Oakey with -6 degrees on June 28, and the three hottest days were recorded at Birdsville Airport, with the peak at 45.4 degrees on January 24.

Overall, it was Australia's coolest year since 2001, but the mean temperature was still above average at 22 degrees, 0.19 degrees above the 1961 - 1990 average.

It was the eighth-warmest year on record for minimum temperatures.

Mr Fabburg said the La Nina ocean system, the main cause of widespread flooding and heavy rain in 2010, was expected to continue for at least the first quarter of 2011.

But hot, dry weather may return later in the year if an El Nino system takes over.

"What happens after the La Nina ends is the real question," he said.

"Probability wise there is a 40 per cent chance of this La Nina going into an El Nino and a 50 per cent chance of this La Nina going into another La Nina."

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Re: 2010 Among Australia's Wettest On Record

Postby @weather_wa » Wed Jan 05, 2011 2:25 pm

Victoria experiences fifth wettest year on record in 2010:

IT broke the drought and flooded the state, but 2010 wasn't the wettest year Victoria has ever had.

In fact, if annual rainfall was an Olympic sport, 2010 wouldn't even make the dais, coming in as Victoria's fifth wettest year on record.

But if it felt to farmers, gardeners and pretty much everyone as though it had been a long time between drinks, it had.

Not since 1974 have Victorians seen so much rain.

The Bureau of Meteorology's Annual Climate Summary for Victoria shows that in 2010, the wettest spot in the state was Falls Creek, where more than three metres of rain fell.

Almost two-thirds of the state received rainfall totals very much above the long-term average in the year and for several towns in the north-central region, it was the wettest year on record.

Alexandra, Lancefield, Mansfield, Redesdale and Yea all had their wettest ever years, each recording more than a metre of rainfall.

Most of the rain across the state fell in the second half of the year, driven by record warmth in the tropical waters around northern Australia, the Bureau of Meteorology says.

This, combined with the strong La Nina event in the Pacific Ocean, caused tropical moisture to head down south from September to December, leading to flooding across Victoria's north, east and west, with some rivers reaching record peaks of more than five metres.

A plague of locusts followed, swarming across the state from the north.

Combined with this, there were heavy lightning and thunderstorms in January and March, with the March thunderstorm bringing large hail and heavy rain, resulting in widespread flash flooding as well as water and hail damage to property.

A bumper snow season in the Alps was capped off with mid-December snowfalls, bringing white Christmas scenes to some mountain areas, as people frolicked in the snow wearing Santa caps.

The cold end to the year dovetailed with a hot start to it, after January 2010 temperatures soared to 45.7 degrees at Avalon on January 11, the state's hottest day of the year.

Most weather stations on this day registered temperatures above 42 degrees, and Port Fairy, on the south-west coast, had its hottest day on record, recording a sweltering 44.3 degrees.

All in all, while not the wettest or hottest year on record overall, 2010 brought some memorable weather with it, of record highs, record falls, floods, hail, locust plagues and Christmas snow.

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Re: 2010 Among Australia's Wettest On Record

Postby Snowman » Wed Jan 05, 2011 7:48 pm

Well without any facts and figures Queensland categorically looks like a brown swimming pool... Don't need the BOM to remind me it was the wettest year on record for QLD. :lol:

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Re: 2010 Among Australia's Wettest On Record

Postby @weather_wa » Thu Jan 06, 2011 4:06 pm

National wrap up:

Australia had its wettest year on record with eleven months of above average rain. Unusually heavy rain fell over Queensland, New South Wales, the Northern Territory and South Australia.

Queensland actually recorded its wettest year on record, while New South Wales, the Northern Territory and South Australia had its third wettest and Victoria its fifth wettest year. Tasmania was close to average while parts in WA were particularly dry.

The ten years from 2001 to 2010 was the warmest decade on record for Australia since 1910. In 2010, Australia's average temperature was the lowest it's been in nine years. On the whole, maximums were below normal, with an average anomaly of minus 0.2 degrees.

Increased cloud cover was one of the main reasons for higher minimums and Australia recorded its eighth warmest year on record for minimum temperatures.

Especially the tropics experienced high overnight temperatures. Cape Don in the Northern Territory had its warmest July minimum of 26.9 degrees.

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