Tasmania in spring 2011: warm with a wet finish

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.

  • Warm spring days and nights overall
  • Average rainfall for the season
  • Hobart’s warmest spring in 24 years
  • A record 111 mm at Eddystone Point on 27 November

Monthly summaries have also been prepared for September, October and November.

A wet finish to spring

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.

Warm spring days

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.

Warm spring nights

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 warmest spring in 24 years

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.

Further information

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Extremes in spring 2011
Hottest day 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 average8.1 °C at Mount Wellington
Coldest day -1.1 °C at Mount Wellington on 11 Sep
Coldest night -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
Warmest night 18.0 °C at Friendly Beaches on 20 Oct
Warmest on average overall 13.9 °C at Eddystone Point
Coolest on average overall4.5 °C at Mount Wellington
Wettest overall 832.2 mm at Lake Margaret Power Station
Driest overall 105.4 mm at Fingal (Legge Street)
Wettest day 110.6 mm at Eddystone Point on 27 Nov
Highest wind gust 146 km/h at Macquarie Island on 27 Sep

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

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)
Previous wettest
for spring
Years of
record
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
temperature
for spring 2011 (°C)
Most recent spring
at least this warm
Years since
warmer
Average for
spring
Hobart (Ellerslie Road) 18.0 =18.0 in 1987 24 16.9


Summary statistics for spring 2011
Maximum temperatures
for spring
(°C)
Minimum temperatures
for spring
(°C)
Rainfall
for spring
(millimetres)
Mean for
spring
2011
Diff
from
average
Highest for
spring
2011
Mean for
spring
2011
Diff
from
average
Lowest for
spring
2011
Total for
spring
2011
Average
for
spring
Rank of
spring
2011
Fraction of
spring
average
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%

Notes

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 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.

Further information

Media
(03) 9669 4057
Enquiries