Thursday, 1 December 2011 - Seasonal Climate Summary for Tasmania - Product code IDCKGC27R0
Spring rainfall was close to average across Tasmania in 2011. In the north, a dry September was balanced by a wet November. Maximum temperatures were up to one degree warmer than normal following a warm September and November, whilst minimum temperatures were about half a degree warmer than average.
Spring rainfall was close to average for all areas of Tasmania. It had been dry in the north in September, and average to dry across Tasmania in October, but wet conditions in the last week of November helped raise overall spring rainfall totals. The most significant rainfall event was around 26 November when a low pressure system to the northeast of Tasmania extended rainfall state wide. The heaviest falls were in the northeast, notably at Eddystone Point which had its wettest spring day on record with 111 mm in the 24 hours to 9am on 27 November.
Lake Margaret Power Station’s 832 mm was the wettest confirmed overall (the rain gauge on Mount Read registered 1170 mm but was affected by snow on some days in October and the full total there is not known). In strong contrast, Fingal was the driest location with 105 mm for the whole season.
Daytime temperatures were up to one degree warmer than normal overall, following warm conditions in September and November and a few hot days in October. There were many cool days in October. Most locations had their warmest spring day on 6 November when northerly winds pushed temperatures up into the high 20s at several locations, but a few had their warmest day around 19 October in similar conditions.
Average minimum temperatures were around half a degree warmer than normal for spring. This was due to warmer than average nights in November, and despite several very cold nights in October. Strahan and Dover had their lowest October temperatures on record, and the temperature dropped below -5 °C at Liawenee on four occasions. In contrast, at many locations the temperature did not drop below 10 °C in the final five days of November.
Hobart’s spring average maximum temperature was 18.0 °C, which is just over a degree warmer than average. The last time spring days were this warm in Hobart was in 1987. There were warm conditions in September, a few very warm days in October, and a warm November.
The average minimum temperature of 8.7 °C was close to one degree warmer than normal due to several mild nights in September and November. The coldest spring nights were in October, with the temperature falling below 3 °C on two occasions (2.8 °C on the 25th was the coldest morning of spring). There were also a few warm nights in October however, with the warmest spring night of 16.6 °C occurring on the 20th.
Hobart’s spring rainfall total of 162 mm was just shy of the long-term spring average of 170 mm, but much lower than the 235 mm received last spring, or the 268 mm received in the spring of 2009.
|Extremes in spring 2011|
31.0 °C at Swansea (Francis Street) on 6 Nov|
|Warmest days on average||
18.5 °C at Bushy Park, Friendly Beaches|
and Launceston (Ti Tree Bend)
|Coolest days on average||8.1 °C at Mount Wellington|
-1.1 °C at Mount Wellington on 11 Sep|
-6.0 °C at Liawenee on 3 Oct|
|Coolest nights on average||0.8 °C at Mount Wellington|
|Warmest nights on average||10.8 °C at Hogan Island|
18.0 °C at Friendly Beaches on 20 Oct|
|Warmest on average overall||13.9 °C at Eddystone Point|
|Coolest on average overall||4.5 °C at Mount Wellington|
|Wettest overall||832.2 mm at Lake Margaret Power Station|
105.4 mm at Fingal (Legge Street)|
110.6 mm at Eddystone Point on 27 Nov|
|Highest wind gust||
146 km/h at Macquarie Island on 27 Sep|
Click on a map to show it full size in a pop-up window
|Record highest spring daily rainfall|
Highest daily rainfall
in spring 2011 (mm)
|Eddystone Point||110.6||on 27 Nov||100.6||on 25 Nov 1972||104|
|Highest spring mean daily maximum temperature for at least 20 years|
Mean daily maximum
for spring 2011 (°C)
Most recent spring
at least this warm
|Hobart (Ellerslie Road)||18.0||=18.0||in 1987||24||16.9|
|Summary statistics for spring 2011|
|Northern (district 91)|
|Bridport (Sea View Villas)||16.9||+0.4||24.4||6 Nov||1.5||3 Oct||212.7||184.4||average||115%|
|Burnie (Round Hill)||16.9||+0.9||22.5||19 Nov||8.5||+0.3||3.0||10 Oct||287.3||243.0||high||118%|
|Cape Grim||14.7||21.2||29 Nov||9.8||4.6||2 Oct||247.8|
|Cape Grim BAPS (Comparison)||15.2||+0.7||21.2||29 Nov||9.7||+0.3||4.5||2 Oct||252.6||192.8||high||131%|
|Cressy Research Station||17.5||+0.1||27.5||25 Nov||5.5||+0.1||-2.5||8 Sep||156.0||165.5||average||94%|
|Devonport Airport||16.7||+0.9||22.9||29 Nov||7.9||+0.5||1.1||24 Sep||220.3||197.0||average||112%|
|Launceston (Ti Tree Bend)||18.5||+0.5||27.7||6 Nov||7.1||+0.1||0.1||8 Sep||190.6||167.7||average||114%|
|Launceston Airport||17.8||27.9||6 Nov||5.5||-2.2||10 Oct||175.0|
|Low Head||15.8||+0.3||20.3||29 Nov||9.9||+0.2||4.0||24 Sep||243.6||170.0||high||143%|
|Luncheon Hill (Forestry)||15.6||+0.9||24.0||25 Nov||6.7||+0.4||0.9||24 Sep||398.0||407.7||average||98%|
|Marrawah||15.7||+0.6||22.5||19 Oct||8.7||+0.5||3.7||25 Sep||277.2||264.9||high||105%|
|Scottsdale (West Minstone Road)||16.7||+0.3||25.5||6 Nov||6.2||+0.1||-1.2||8 Sep||226.6||252.5||average||90%|
|Sheffield School Farm||15.5||+0.1||23.3||6 Nov||5.9||-0.1||-0.8||24 Sep||288.6||291.8||average||99%|
|Smithton Aerodrome||16.7||+0.3||22.6||29 Nov||7.3||0.0||-0.2||24 Sep||255.8||244.0||average||105%|
|Wynyard Airport||17.3||+1.2||23.7||4 Nov||6.5||+0.2||-0.7||24 Sep||287.0||261.9||average||110%|
|East Coast (district 92)|
|Bicheno (Council Depot)||17.7||+0.4||26.3||6 Nov||9.0||+0.4||2.3||2 Sep||151.2||157.7||average||96%|
|Eddystone Point||18.3||+2.0||27.0||20 Oct||9.5||+0.2||2.9||10 Oct||248.0||193.5||high||128%|
|Fingal (Legge Street)||17.9||+0.5||28.6||6 Nov||4.5||-0.6||-3.7||8 Sep||105.4||148.9||low||71%|
|Friendly Beaches||18.5||+0.4||30.2||6 Nov||8.8||0.0||1.4||25 Sep||117.8||149.3||low||79%|
|Lake Leake (Elizabeth River)||14.1||+0.6||25.4||6 Nov||3.5||-0.1||-3.7||10 Oct||173.4||209.3||average||83%|
|Maria Island (Point Lesueur)||16.5||26.6||6 Nov||9.6||4.0||10 Oct||132.2|
|Orford (Aubin Court)||17.4||+0.2||29.4||6 Nov||7.6||+0.3||0.0||8 Sep||151.2||176.7||average||86%|
|Scamander||18.0||+0.4||29.2||6 Nov||8.3||0.0||1.5||12 Sep||189.2||182.0||average||104%|
|St Helens Aerodrome||17.9||+0.5||29.4||6 Nov||8.1||-0.2||0.7||12 Sep||195.0||196.1||average||99%|
|Swan Island||16.6||24.2||6 Nov||10.5||4.5||10 Oct||252.2|
|Swansea (Francis Street)||18.0||31.0||6 Nov||7.3||-0.4||25 Sep||124.4|
|Midlands (district 93)|
|Ross (The Boulevards)||17.4||+0.3||28.1||25 Nov||4.8||-0.3||-3.4||10 Oct||146.4||144.3||average||101%|
|Southeast (district 94)|
|Campania (Kincora)||18.4||+0.2||29.7||6 Nov||6.6||-0.1||-1.0||2 Sep||125.4||134.1||average||94%|
|Cape Bruny (Cape Bruny)||15.9||+0.5||27.8||6 Nov||8.5||+0.1||4.1||11 Oct||186.8||195.4||average||96%|
|Cape Bruny Lighthouse||15.3||+0.9||27.4||6 Nov||8.4||+0.4||1.6||10 Sep||199.4||240.4||low||83%|
|Dover||16.5||+0.4||30.2||6 Nov||6.5||+0.1||-0.5||2 Oct||208.2||240.5||average||87%|
|Geeveston (Cemetery Road)||17.0||+0.6||30.5||6 Nov||6.6||+0.5||-1.1||2 Sep||256.6||255.5||average||100%|
|Grove (Research Station)||17.5||29.8||6 Nov||5.4||-2.3||25 Oct||207.6|
|Hobart (Ellerslie Road)||18.0||+1.1||30.7||6 Nov||8.7||+0.9||2.8||25 Oct||162.0||169.5||average||96%|
|Hobart Airport||17.8||+0.6||29.5||6 Nov||8.2||+0.6||1.9||2 Sep||128.8||133.3||average||97%|
|Maatsuyker Island Lighthouse||13.5||+0.2||26.5||6 Nov||8.3||+0.8||4.0||7 Sep||321.2||308.3||average||104%|
|Melton Mowbray (North Stockman)||17.1||+0.2||29.0||6 Nov||5.6||-0.2||-2.2||2 Oct||119.2||136.9||average||87%|
|Mount Wellington||8.1||+1.1||20.9||6 Nov||0.8||+0.6||-5.1||25 Oct|
|Tasman Island||14.0||27.1||6 Nov||8.1||3.3||10 Oct||255.0||203.0||high||126%|
|Tunnack Fire Station||14.7||0.0||24.2||25 Nov||4.7||+0.1||-3.5||2 Oct||178.6||186.8||average||96%|
|Derwent Valley (district 95)|
|Bushy Park (Bushy Park Estates)||18.5||+0.9||30.4||6 Nov||5.8||+0.1||-2.0||2 Oct|
|Maydena Post Office||15.8||+0.1||29.0||6 Nov||5.0||+0.1||-3.0||2 Oct||368.6||352.7||average||105%|
|Ouse Fire Station||18.2||+0.1||29.3||25 Nov||5.6||+0.2||-2.2||2 Oct||157.6||168.2||average||94%|
|Central Plateau (district 96)|
|Butlers Gorge||13.2||+0.9||25.0||25 Nov||2.9||+0.5||-5.1||19 Sep||488.0||468.3||average||104%|
|Lake St Clair National Park||13.3||+0.6||25.6||25 Nov||2.7||+0.6||-4.2||2 Oct||575.0||530.7||average||108%|
|Liawenee||11.9||+0.1||24.4||5 Nov||1.3||+0.4||-6.0||3 Oct||225.8||265.0||low||85%|
|West Coast (district 97)|
|Cape Sorell||15.7||+1.4||22.9||6 Nov||9.5||+0.8||4.0||2 Oct||293.0||321.5||average||91%|
|Hartz Mountain (Keoghs Pimple)||11.2||+0.2||25.5||6 Nov||3.2||+0.4||-1.7||25 Oct||305.2||271.6||average||112%|
|Mount Read||8.4||+0.7||20.2||25 Nov||1.9||+0.4||-3.2||25 Oct|
|Scotts Peak Dam||15.0||+0.2||30.0||6 Nov||5.6||+0.2||-0.2||2 Oct||584.8||492.4||high||119%|
|Strahan Aerodrome||16.8||+0.8||30.6||6 Nov||7.5||+0.2||-1.1||2 Oct||507.0||376.2||v high||135%|
|Warra||13.8||28.4||6 Nov||4.5||-2.7||2 Oct||559.6|
|King Island (district 98)|
|King Island Airport||17.0||+1.2||27.8||19 Oct||9.6||+0.6||3.1||24 Sep||217.8||219.3||average||99%|
|Flinders Island (district 99)|
|Flinders Island Airport||17.5||+0.7||30.3||6 Nov||9.3||+0.5||-1.0||25 Sep||220.5||180.6||high||122%|
|Hogan Island||16.3||27.0||29 Nov||10.8||5.7||7 Sep||227.0|
|Antarctica and Macquarie Island (district 300)|
|Macquarie Island||6.4||+0.5||8.9||11 Oct||2.5||+0.4||-3.9||4 Nov||244.8||222.6||average||110%|
A Seasonal Climate Summary is prepared to list the main features of the weather in Tasmania using the most timely and accurate information available on the date of publication; it will generally not be updated. Later information, including data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review, usually published in the fourth week of the month.
This statement has been prepared based on information available at 9 am on Thursday 1 December 2011. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
Averages are long-term means based on observations from
all available years of record, which vary widely from site to site.
They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.
The Rank indicates how rainfall this time compares with the climate record for the site,
based on the
(very low rainfall is in decile 1, low in decile 2 or 3,
average in decile 4 to 7, high in decile 8 or 9
and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.