Thursday, 1 November 2007 - Monthly Climate Summary for Tasmania - Product code IDCKGC17R0
Westerly winds and cold fronts dominated Tasmania's weather during October, bringing above-average rain to the west but below-average to the east. There were also some very warm days but some very cold nights, along with strong wind gusts — typical spring weather for Tasmania.
Wet in the west, dry in the east: Westerly
winds and cold fronts brought plenty of rain to the western
highlands, with most sites there receiving well over 200 mm.
typical with westerly winds, there was far less rain in the eastern
half, with several sites in the Midlands and the Fingal Valley
receiving less than 20 mm for the whole month, giving some sites in that area their driest October since 1982.
Mount Read, in the western highlands, registered over 200 mm in 48 hours on its
way to getting
a total of 515 mm for the month (by way of comparison, most of eastern Tasmania has
received less than 500 mm for the whole year so far).
Overall, totals were above average in the western half (and well above average in the highlands), but below average in the east (with the exception of the far northeast coast where some moderate falls around the 27th ensured the monthly totals were close to average). In parts of the Midlands and the Fingal Valley, totals were well below average.
Some warm days, but cool ones too: The
fronts that brought an abundance of rain to the western half of the
state were also the cause of warm days in the south and
east, and sometimes to the west. This was particularly the
case on the 20th, 27th and 28th when pre-frontal northerlies brought
warm air from over the mainland across Tasmania and pushed temperatures
well into the 20s; Scotts Peak Dam in the southwest highlands reached
26.8 °C on the 27th. The other side of this was
some cold days in post-frontal southwesterlies, especially in
the first week and again around the 12th, 16th and 29th.
Overall, maximum temperatures were below average in the west and north, typically by around half a degree but by over a degree in the western highlands, and above average by about half a degree in the east.
Many cold nights, but some mild: Most
nights were colder than average, with the main exceptions being around
the 11th, the 15th and the 26th to 29th. The morning of the 23rd was
especially cold inland (Liawenee dipped to
-6.3 °C), as winds
eased and skies cleared behind a cold front. The mornings of the the 27th and 28th were
particularly mild in strong pre-frontal winds.
Taken across the month, minimum temperatures were below average by about half a degree inland, but slightly above average on most of the coasts.
Many windy days: Strong and gusty westerly winds were common from the 1st to the 4th, from the 12th to 19th, and again from the 28th to the 31st. Numerous gusts in excess of 100 km/h were reported across the state, with the highest 148 km/h at Mount Wellington on the 4th. The strong winds coupled with low pressure to create abnormally high tides early in the month.
26.8 °C at Scotts Peak Dam on the 27th|
|Warmest days on average|
Highest mean daily maximum temperature
18.6 °C at Swansea Post Office|
|Coolest days on average|
Lowest mean daily maximum temperature
|6.5 °C at Mount Read|
Lowest daily maximum temperature
0.3 °C at Mount Wellington on the 16th|
-6.3 °C at Liawenee on the 23rd|
|Coolest nights on average|
Lowest mean daily minimum temperature
-0.4 °C at Mount Wellington|
|Warmest nights on average|
Highest mean daily minimum temperature
10.0 °C at Swan Island|
Highest daily minimum temperature
15.8 °C at Strahan Aerodrome on the 28th|
Highest total rainfall
515.0 mm at Mount Read|
Lowest total rainfall
13.4 mm at Lewis Hill (St Pauls River)|
Highest daily rainfall
104.6 mm at Mount Read on the 15th|
|Highest wind gust||
148 km/h at Mount Wellington on the 4th|
|Lowest total October rainfall for at least 20 years|
for October 2007 (mm)
|Most recent lower
|Fingal (Legge Street)||17.2||5.3||in 1982||25||55.2|
|York Plains (Handroyd)||18.6||18.5||in 1982||25||55.3|
|Lewis Hill (St Pauls River)||13.4||1.8||in 1982||24||54.0|
|Nugent (Twilight Valley)||34.8||14.7||in 1982||24||67.3|
|Lowest October mean daily minimum temperature for at least 20 years|
for October 2007 (°C)
|Most recent lower
|Orford (Aubin Court)||6.2||6.1||in 1976||31||7.2|
In this table, key sites have been highlighted to make them easier to find. This table is very wide and may not fit if printed.
|Summary statistics for October 2007|
|Northern (district 91)|
|Cape Grim BAPS||13.9||-0.3||18.4||21st||9.0||-0.2||6.4||18th||48.2||63.3||normal||76%|
|Cressy Research Station||17.4||24.4||25th||4.1||-3.2||8th||19.6|
|Launceston Airport Comparison||16.7||+0.3||23.5||25th||5.0||-0.5||0.8||17th||18.4||60.9||very low||30%|
|Sheffield School Farm||14.8||-0.2||20.3||25th||5.3||-0.5||0.1||7th||53.4||86.7||normal||62%|
|East Coast (district 92)|
|St Helens Aerodrome||17.5||25.4||20th||8.2||2.5||7th||52.4|
|Swansea Post Office||18.6||+0.8||24.5||11th||8.0||+0.9||1.3||8th||23.6||53.8||low||44%|
|Midlands (district 93)|
|Southeast (district 94)|
|Cape Bruny Lighthouse||14.7||+0.3||20.6||28th||8.0||+0.1||2.8||5th||83.4||84.0||normal||99%|
|Maatsuyker Island Lighthouse||12.5||-0.8||23.5||27th||7.3||-0.1||4.2||7th||123.0||106.8||normal||115%|
|Tunnack Fire Station||14.9||+0.7||21.9||25th||4.2||-0.2||-3.7||7th||38.6||58.8||low||66%|
|Derwent Valley (district 95)|
|Maydena Post Office||14.9||-0.7||24.2||28th||5.0||+0.3||-0.6||7th||164.9||131.2||normal||126%|
|Ouse Fire Station||17.4||-0.1||24.3||25th||5.4||+0.1||-0.6||18th||67.4||62.4||normal||108%|
|Central Plateau (district 96)|
|Lake St Clair National Park||11.8||-0.8||20.3||25th||1.9||-0.1||-2.5||7th||296.0||188.3||very high||157%|
|West Coast (district 97)|
|Mount Read||6.5||-1.0||17.9||26th||0.9||-0.4||-2.4||17th||515.0||374.4||very high||138%|
|Scotts Peak Dam||13.6||-0.4||26.8||27th||4.8||-0.1||1.8||17th||233.2|
|Strathgordon Village||12.8||-0.6||24.2||27th||5.1||-0.3||1.0||18th||397.8||255.6||very high||156%|
|King Island (district 98)|
|King Island Airport||15.5||0.0||21.8||18th||9.1||+0.4||4.8||17th||59.0||76.2||normal||77%|
|Flinders Island (district 99)|
|Flinders Island Airport||16.6||-0.1||23.3||28th||9.4||+0.9||1.8||10th||42.6||61.4||normal||69%|
|Macquarie Island (district 300)|
This statement has been prepared based on information available at 11 am on Thursday 1 November 2007. Some checks have been made on the data, but it is possible that results will change as new information becomes available.
Normals are long-term
means based on observations
from all available years of record, which vary widely from site to
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 "normal" 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,
normal in decile 4 to 7, high in
decile 8 or 9 and very high is in decile 10).
The Fraction of normal shows how much rain has fallen this time as a percentage of the long-term mean.