Tasmania in spring 2018: a warm season with rain mostly below average

Tasmania was warmer than average during spring. Rain was below average for much of the season, and spring totals were well below average in the west, but some moderate to heavy falls in November ensured the east had near-average rainfall overall

Rain well below average in the west but near average in the east

  • Rainfall was below average in September, well below average in October (Tasmania's third-driest October on record), but above average in the east during November
  • Total rainfall for spring was well below average for the western half of Tasmania, but totals in the east were close to average
  • With a relatively low rainfall in the usually wet west, Tasmania's total spring rainfall was 30% below average and the eighth-driest spring on record
  • A slow-moving cloud band with embedded thunderstorms brought intense rain to parts of the west on 20 November, giving a spring record 63.4 mm of rain to Strahan in the 24 hours to 9 am on 21 November, with most of that falling in the 3 hours between 10 pm on the 20th and 1 am on the 21st
  • A low pressure system to the east of Tasmania from 22 to 25 November brought moderate falls across the State, with locally heavy falls on the central East Coast; enough to ensure spring total rainfall was close to average in the east

A warm spring overall

  • Daytime maximum temperatures were above average in September (especially in the east), well above average in October, and above average in during November (especially in the west)
  • Minimum temperatures were below average for much of the State in September (especially in the north), but well above average in October and November
  • Overall, temperatures were above average across Tasmania during spring
  • Temperatures reached into the low 30s at some locations (including Hobart) on 13 November, the warmest day since March, but no temperature records were broken during spring 2018
  • There was some marked cold weather, especially during September including Liawenee's minimum of -7.5 °C on the morning of 3 September and a generally cold day on the 29 September
  • The State's mean maximum temperature was 0.80 °C above average, the mean minimum temperature 0.54 °C above average
  • Tasmania's overall mean temperature was the eighth-warmest for spring at 0.67 °C above average, generally cooler than the record-breaking spring 2017 but warmer than spring 2016

Dry and mild for much of the time at Hobart

  • Total rainfall for Hobart (Ellerslie Road) was 109.2 mm, which is 65% of the long-term average of 168.7 mm
  • The mean daily maximum temperature for Hobart (Ellerslie Road) was 18.0 °C, which is 1.0 °C above the long-term average of 17.0 °C.
  • Hobart's warmest day was 31.0 °C on 13 November (the warmest day since February), whilst it coolest day was on 10 October when the temperature reached 11.4 °C
  • The mean daily minimum temperature for Hobart (Ellerslie Road) was 8.9 °C, which is 1.0 °C above the long-term average of 7.9 °C
  • The coldest morning was 2.3 °C on 3 September, and the warmest morning was on 16 October when the minimum temperature was 15.9 °C

Further information

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Extremes in spring 2018
Hottest day 31.2 °C at Swansea (Francis Street) on 13 Nov
Warmest days on average 18.8 °C at Bushy Park (Bushy Park Estates)
Coolest days on average 7.9 °C at Mount Read
Coldest day -1.1 °C at kunanyi (Mount Wellington Pinnacle) on 1 Sep
Coldest night -7.5 °C at Liawenee on 3 Sep
Coolest nights on average 1.0 °C at kunanyi (Mount Wellington Pinnacle)
Warmest nights on average 10.7 °C at Swan Island
Warmest night 17.4 °C at Strahan Aerodrome on 15 Oct and 16 Oct
Warmest on average overall 13.8 °C at Friendly Beaches
Coolest on average overall 4.6 °C at kunanyi (Mount Wellington Pinnacle)
Wettest overall 764.6 mm at Mount Read
Wettest day 63.4 mm at Strahan Aerodrome on 21 Nov
Strongest wind gust 159 km/h at Maatsuyker Island Lighthouse on 12 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
New record
(mm)
Old
record
Years of
record
Cape Sorell 58.0 on 21 Nov 54.0 on 3 Nov 2005 94
Strahan Aerodrome 63.4 on 21 Nov 57.4 on 26 Sep 1996 35



Summary statistics for spring 2018
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
spring
2018
Diff
from
average
Highest for
spring
2018
Mean for
spring
2018
Diff
from
average
Lowest for
spring
2018
Total for
spring
2018
Average
for
spring
Rank of
spring
2018
Fraction of
spring
average
Northern (district 91)
Cape Grim 14.5   19.9 13 Nov 9.6   3.6 24 Sep 136.0
Cape Grim BAPS (Comparison) 14.9 +0.2 20.1 1 Nov 9.7 +0.2 4.0 24 Sep   189.6    
Cressy Research Station 17.6 +0.1 26.7 13 Nov     -2.7 29 Sep 105.8 163.3 low 65%
Devonport Airport 16.6 +0.6 22.2 13 Nov 8.0 +0.4 0.3 24 Sep 120.1 193.7 low 62%
Launceston (Ti Tree Bend) 18.7 +0.6 29.0 13 Nov 7.3 +0.2 -1.2 2 Sep 132.5 166.5 low 80%
Launceston Airport 17.5 -0.3 28.2 13 Nov 5.7 0.0 -2.7 28 Oct 119.8 151.4 average 79%
Low Head 15.8 +0.2 21.8 24 Nov 10.1 +0.3 3.0 2 Sep 171.8 160.0 average 107%
Luncheon Hill (Forestry) 14.9 0.0 21.2 24 Nov 6.9 +0.5 0.2 24 Sep 250.8 392.5 v low 64%
Marrawah 15.6 +0.5 20.3 25 Nov 8.7 +0.4 2.5 24 Sep 183.8 259.0 low 71%
Scottsdale (West Minstone Road) 16.3 -0.2 24.9 13 Nov 6.5 +0.3 -1.4 16 Sep 219.6 244.2 average 90%
Sheffield School Farm 15.5 0.0 22.9 14 Nov 6.1 +0.1 -1.3 24 Sep 177.8 272.2 low 65%
Smithton Aerodrome 16.9 +0.4 22.6 13 Nov 7.2 -0.1 -0.4 24 Sep 155.6 232.5 low 67%
Wynyard Airport 16.8 +0.5 23.2 23 Nov 7.0 +0.5 -1.4 24 Sep 140.8 257.0 v low 55%
East Coast (district 92)
Bicheno (Council Depot) 17.5 +0.1 22.8 30 Nov 9.2 +0.5 2.8 20 Sep 203.5 159.2 high 128%
Fingal (Legge Street)     28.3 13 Nov 5.4 +0.3 -4.4 20 Sep 159.2 149.1 average 107%
Friendly Beaches 18.6 +0.3 26.6 13 Nov 8.9 +0.1 1.5 20 Sep 183.8 158.4 high 116%
Lake Leake (Elizabeth River) 13.9 +0.1 25.8 13 Nov 3.7 0.0 -3.6 20 Sep 175.7 208.2 average 84%
larapuna (Eddystone Point) 17.5 +1.2 22.8 3 Oct 9.9 +0.8 3.4 16 Sep 158.0 191.2 average 83%
Maria Island (Point Lesueur) 16.5 -0.2 24.7 13 Nov 10.0 +0.4 4.9 24 Sep 105.0 133.6 average 79%
Orford (Aubin Court) 17.7 +0.4 30.4 13 Nov 7.8 +0.4 0.0 21 Sep 122.2 176.1 low 69%
St Helens Aerodrome 17.6 -0.1 25.5 13 Nov 8.5 +0.2 1.4 20 Sep 161.2 194.5 average 83%
Swan Island 16.4 +0.2 22.7 13 Nov 10.7 +0.2 4.7 2 Sep 160.2 163.0 average 98%
Swansea (Francis Street) 17.6   31.2 13 Nov 7.6   0.1 3 Sep 126.0
Midlands (district 93)
Ross (The Boulevards) 17.1 -0.2 28.0 13 Nov 5.2 0.0 -3.8 24 Sep 119.4 138.9 average 86%
Southeast (district 94)
Campania (Kincora) 18.5 +0.1 30.6 13 Nov 6.9 0.0 -0.8 29 Sep 105.0 132.9 average 79%
Cape Bruny (Cape Bruny) 16.3 +0.7 27.9 13 Nov 8.7 +0.2 4.3 16 Sep 132.8 194.4 v low 68%
Cape Bruny Lighthouse 15.6 +1.1 27.2 13 Nov 9.1 +1.1 4.0 16 Sep 137.3 238.5 v low 58%
Dennes Point 16.7   28.3 13 Nov 9.1   3.6 26 Sep 113.0
Dover 17.2 +0.9 29.5 13 Nov 6.9 +0.4 0.0 3 Sep 182.0 238.1 low 76%
Dunalley (Stroud Point) 17.3   29.7 13 Nov 9.6   4.1 29 Sep 78.8
Grove (Research Station) 17.5 +0.1 29.4 13 Nov 6.1 +0.3 -2.0 29 Sep 109.8 194.4 v low 56%
Hobart (Ellerslie Road) 18.0 +1.0 31.0 13 Nov 8.9 +1.0 2.3 3 Sep 109.2 168.3 low 65%
Hobart Airport 18.1 +0.8 29.7 13 Nov 8.3 +0.6 0.5 26 Sep 88.2 130.6 low 68%
kunanyi (Mount Wellington Pinnacle) 8.1 +0.9 18.8 13 Nov 1.0 +0.6 -4.6 16 Sep
Maatsuyker Island Lighthouse 13.7 +0.4 25.0 15 Oct 8.5 +0.9 4.2 2 Sep 197.0 304.8 v low 65%
Melton Mowbray (North Stockman) 17.3 +0.2 29.7 13 Nov 5.8 0.0 -1.9 11 Oct 107.0 130.1 average 82%
Tunnack Fire Station 15.1 +0.2 25.3 13 Nov     -3.3 3 Sep
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 18.8 +1.1 30.0 13 Nov 5.9 +0.1 -1.6 3 Sep   162.6   22%
Maydena Post Office 16.3 +0.4 27.2 13 Nov 5.3 +0.4 -1.9 26 Sep 220.2 338.6 v low 65%
Ouse Fire Station 18.5 +0.3 28.9 13 Nov 5.5 0.0 -2.3 24 Sep 95.8 158.9 low 60%
Central Plateau (district 96)
Butlers Gorge 13.5 +1.1 23.4 13 Nov 3.0 +0.5 -4.2 4 Oct 304.4 465.4 v low 65%
Lake St Clair National Park 13.6 +0.7 23.4 13 Nov 3.2 +1.0 -3.3 3 Sep 365.6 525.9 v low 70%
Liawenee 11.9 -0.1 20.8 13 Nov 1.4 +0.4 -7.5 3 Sep 216.4 245.5 average 88%
West Coast (district 97)
Cape Sorell 15.9 +1.5 21.7 19 Nov 9.5 +0.7 4.1 26 Sep 199.2 314.8 v low 63%
Hartz Mountain (Keoghs Pimple) 11.5 +0.4 22.5 13 Nov 3.3 +0.3 -2.1 16 Sep 209.2 266.9 low 78%
Low Rocky Point 15.4   26.8 15 Oct 8.9   3.1 26 Sep 244.6 327.7 low 75%
Mount Read 7.9 0.0 18.0 18 Nov 1.9 +0.3 -4.0 24 Sep 764.6 943.7 low 81%
Scotts Peak Dam 16.0 +0.9 29.2 19 Nov 5.9 +0.4 0.4 16 Sep 351.6 493.0 v low 71%
Strahan Aerodrome 17.0 +0.8 27.5 19 Nov 7.8 +0.4 0.1 26 Sep 300.2 369.6 low 81%
Warra 14.0 +0.2 25.4 13 Nov 4.3 -0.3 -3.3 26 Sep 337.4 505.8 v low 67%
King Island (district 98)
King Island Airport 16.5 +0.5 27.3 13 Nov 9.4 +0.2 2.2 26 Sep 97.0 211.2 v low 46%
Flinders Island (district 99)
Flinders Island Airport 17.5 +0.6 27.5 13 Nov 9.4 +0.6 -1.2 28 Oct 175.8 176.6 average 100%
Hogan Island 16.6 +0.1 26.6 1 Nov 10.5 0.0 4.7 16 Sep 114.6 143.3 low 80%
Note: From 2017, information about Macquarie Island can be found in the climate summary for the Remote Islands and Antarctica

Notes

The Seasonal climate summary, generally published on the first working day of each month, lists 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. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This statement has been prepared based on information available at 10 am on Monday 3 December 2018. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites 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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
Enquiries