Tuesday, 1 November 2011 - Monthly Climate Summary for Tasmania - Product code IDCKGC17R0
There were relatively few cold fronts crossing Tasmania during October, with the state often finding itself in cool air on the eastern flank of a high south of the Bight. Rain was average or below-average in most areas. Most of the time it was cooler than usual, but there was some warm weather.
Cool days were common in Tasmania for most of October. There were some particularly chilly days at the start of the month, the 9th to the 11th, the 16th and around the 24th, when temperatures were struggling to get into the low teens. In each case Tasmania found itself in cool air on the eastern flank of a high south of the Bight. In stark contrast the period from the 18th to the 20th was very warm, with a high off the NSW coast and a front approaching from the west bringing northerly winds that pushed temperatures in the southeast into the high 20s; Bushy Park reached 30 °C on the 19th.
Despite the cool days, most areas of the state had a relatively warm month overall, with most sites recording daytime temperatures about half a degree warmer than the long-term average for October. Maximum temperatures were cooler than usual in the east, but only by half a degree or so.
There were several very cold nights during October, with Liawenee
dropping below -5 °C on the 2nd, 3rd, 10th and 25th. Strahan and Dover had their lowest
on record on the morning of the 2nd, after
winds slackened and skies cleared after cool air had been brought
across the state late in September. Another shot of cool air late in
the month saw several areas dip
below zero on the morning of the 25th; relatively late in the
year for such a cold morning. There were a few mild nights, notably
when several sites stayed in the high teens through to the morning of
There were fewer than usual rain-bearing systems crossing Tasmania during October. There were wet days, notably around the 11th, the 16th, the 24th and the 29th, but totals for the whole month were average or below in most areas. The main exceptions were on the northwest coast (especially because of heavy showers and thunderstorms on the 24th and the 29th) and the southeast (where southerly winds brought wet weather around the 29th).
Despite a relatively dry month, the western highlands still received over 150 mm. Lake Margaret Power Station's 231 mm was the wettest confirmed overall (the rain gauge on Mount Read registered 279 mm but was affected by snow on some days and the full total there is not known). Fingal, in the northeast, managed only 29 mm for the whole month.
Hobart's temperatures were fractionally above the long-term October average overall. Most days and nights were cooler than normal, but there were also 3 consecutive days over 25 °C, peaking at 29.4 °C on the 19th (the warmest day since mid-March). Along with the rest of the state, Hobart woke to a chilly morning on the 25th, with a minimum of just 2.8 °C. 61.2 mm of rain for the month was just half a millimetre less than the long-term average. There were three particularly wet times for Hobart: the evening of the 8th when a thunderstorm delivered 8.4 mm in half an hour; the 15th to the 17th (with cold and showery weather and mountain snow) and the 29th (after a trough passed over the state).
|Extremes in October 2011|
|Hottest day||30.0 °C at Bushy
Park on the 19th
|Warmest days on average||18.3 °C at Bushy Park|
|Coolest days on average||7.7 °C at Mount
|Coldest day||-0.4 °C at Mount
Wellington on the 11th
|Coldest night||-6.0 °C at Liawenee
on the 3rd
|Coolest nights on average||0.4 °C at Mount Wellington|
|Warmest nights on average||10.4 °C at Hogan Island|
|Warmest night||18.0 °C at Friendly
Beaches on the 20th
|Warmest on average overall||13.6 °C at Eddystone Point|
|Coolest on average overall||4.1 °C at Mount
|Wettest overall||231.4 mm at Lake Margaret Power Station|
|Driest overall||28.8 mm at Fingal (Legge Street)
|Wettest day||43.0 mm at Luncheon Hill on the 30th|
|Highest wind gust||128 km/h at Hogan
Island on the 10th
128 km/h at Cape Grim on the 16th
Click on a map to show it full size in a pop-up window
|Record lowest October temperature|
in October 2011 (°C)
|Strahan Aerodrome||-1.1||on the 2nd||-0.1||on the 31st in 1995||23||7.3|
|Dover||-0.5||on the 2nd||= -0.5||on the 16th in 2006||22||6.4|
|Summary statistics for October 2011|
|Northern (district 91)|
|Bridport (Sea View Villas)||16.7||+0.3||22.4||20th||8.2||+0.3||1.5||3rd||66.8||60.5||average||110%|
|Burnie (Round Hill)||16.3||+0.4||19.8||20th||9.0||+1.0||3.0||10th||100.8||85.7||high||118%|
|Cape Grim BAPS (Comparison)||14.9||+0.6||19.7||19th||9.0||-0.2||4.5||2nd||71.0||62.1||average||114%|
|Cressy Research Station||17.0||-0.1||23.8||20th||4.9||-0.2||-2.1||10th||41.4||49.5||average||84%|
|Launceston (Ti Tree Bend)||18.2||+0.2||23.6||19th||6.4||-0.5||0.3||10th||38.8||51.0||average||76%|
|Luncheon Hill (Forestry)||16.3||+1.7||23.8||19th||6.2||+0.3||1.0||25th||144.6||133.5||average||108%|
|Scottsdale (West Minstone Road)||16.3||-0.1||22.5||19th||5.6||-0.2||-1.0||10th||57.8||83.4||average||69%|
|Sheffield School Farm||15.2||+0.2||21.4||20th||5.4||-0.3||-0.3||10th||87.4||82.2||average||106%|
|East Coast (district 92)|
|Bicheno (Council Depot)||16.9||-0.5||25.4||20th||8.4||-0.1||3.0||10th||44.6||55.7||average||80%|
|Fingal (Legge Street)||16.8||-0.6||26.0||19th||4.3||-0.6||-2.2||10th||28.8||54.4||low||53%|
|Lake Leake (Elizabeth River)||13.2||-0.5||21.6||20th||2.9||-0.6||-3.7||10th||50.6||75.2||average||67%|
|Maria Island (Point Lesueur)||15.7||23.9||20th||9.4||4.0||10th||34.0|
|Orford (Aubin Court)||16.7||-0.6||27.4||20th||7.5||+0.3||1.5||25th||49.6||59.8||average||83%|
|St Helens Aerodrome||17.0||-0.3||25.7||19th||7.6||-0.4||2.4||12th||62.4||69.5||average||90%|
|Swansea (Francis Street)||16.3||27.3||19th||6.7||-0.1||10th||38.8|
|Midlands (district 93)|
|Ross (The Boulevards)||16.8||-0.2||24.6||20th||4.4||-0.5||-3.4||10th||41.4||42.7||average||97%|
|Southeast (district 94)|
|Bull Bay (Lauriston)||15.8||-0.8||28.0||19th||7.9||-0.2||3.5||25th||69.8||56.1||high||124%|
|Cape Bruny (Cape Bruny)||15.4||+0.1||27.4||19th||8.2||0.0||4.1||11th||66.4||67.1||average||99%|
|Cape Bruny Lighthouse||14.8||+0.4||26.4||19th||8.5||+0.6||3.9||11th||69.6||83.5||average||83%|
|Geeveston (Cemetery Road)||16.5||+0.1||28.3||19th||5.7||-0.3||-0.9||4th||91.0||91.5||average||99%|
|Grove (Research Station)||17.0||28.9||19th||4.5||-2.3||25th||75.2|
|Hobart (Ellerslie Road)||17.1||+0.2||29.4||19th||8.1||+0.3||2.8||25th||61.2||61.7||average||99%|
|Maatsuyker Island Lighthouse||12.8||-0.5||23.4||19th||8.1||+0.7||5.1||1st||93.2||105.7||average||88%|
|Melton Mowbray (North Stockman)||16.6||0.0||27.5||19th||4.6||-1.0||-2.2||2nd||42.2||42.4||average||100%|
|Tunnack Fire Station||14.3||-0.1||22.2||20th||4.1||-0.3||-3.5||2nd||53.2||54.6||average||97%|
|Derwent Valley (district 95)|
|Bushy Park (Bushy Park Estates)||18.3||+0.6||30.0||19th||5.3||-0.5||-2.0||2nd||48.4||57.3||average||84%|
|Maydena Post Office||16.0||+0.4||27.0||19th||4.1||-0.7||-3.0||2nd||107.7||117.9||average||91%|
|Ouse Fire Station||18.0||+0.4||28.7||19th||4.6||-0.7||-2.2||2nd||59.0||53.5||average||110%|
|Central Plateau (district 96)|
|Lake St Clair National Park||13.6||+1.0||24.0||19th||1.7||-0.3||-4.2||2nd||152.4||175.2||average||87%|
|West Coast (district 97)|
|Hartz Mountain (Keoghs Pimple)||11.2||+0.5||22.3||19th||2.8||+0.2||-1.7||25th||107.0||91.7||average||117%|
|Scotts Peak Dam||15.2||+0.9||27.2||19th||5.2||+0.2||-0.2||2nd||152.0||166.3||low||91%|
|King Island (district 98)|
|King Island Airport||16.6||+0.9||27.8||19th||9.2||+0.5||3.3||3rd||67.0||74.2||average||90%|
|Flinders Island (district 99)|
|Flinders Island Airport||17.0||+0.3||28.4||20th||8.1||-0.5||2.0||18th||66.6||60.3||average||110%|
A Monthly 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 3 pm on Tuesday 1 November 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 decile
ranking (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.