Australia in November 2017

In brief

  • For Australia as a whole, temperatures above average for November
  • Mean maximum temperature very much above average for southeastern Australia, above average for Western Australia, below average for eastern Queensland and inland north of the Northern Territory
  • Mean minimum temperature above average for southern Australia, below average for parts of eastern Queensland, northeast New South Wales, central Northern Territory and adjacent eastern Western Australia
  • Mean, maximum, and minimum temperature exceptionally warm for Tasmania and Victoria as a whole
  • November rainfall above to very much above average across the Northern Territory, South Australia, in northern, central western and southern parts of Western Australia, parts of northwestern Queensland, and western Victoria
  • Rainfall below average for nearly all of Tasmania, Gippsland in Victoria, and scattered small areas near the west and east coast of the country

Temperatures

Maximum, minimum and mean temperatures for November were above average for Australia as a whole. November temperature anomalies were exceptional for Tasmania and Victoria. Tasmania observed its warmest November mean temperature on record, beating the existing record by a substantial margin (just over half a degree). Maxima were also the warmest on record for Tasmania, and the third-warmest for Victoria. Minima were the third-warmest on record for November in both Tasmania and Victoria. South Australia and Western Australia also observed mean minima which were the eighth-warmest on record for November.

Frost was observed in parts of Victoria and Tasmania during the first week of November, causing significant crop damage in western Victoria, particularly in legume crops which were at a vulnerable growth stage. Cool nights between the 4th and 6th saw some low overnight temperature records for November set in the southeastern States.

After this cool start an extended period of very warm weather affected Victoria and Tasmania, during which many temperature records were broken. The warm spell was characterised more by extended warmth rather than especially hot days. From the 9th a strong blocking high pressure system settled over the southern Tasman Sea, maintaining a persistent northerly airflow over much of the southeast until late in the month. A number of records for consecutive warm days were broken in the southeast, including 12 consecutive days over 25 °C at Sale in Victoria, 9 consecutive days over 28 °C at Melbourne (Olympic Park), 6 consecutive days over 26 °C at Hobart, and 9 consecutive days over 25 °C at Launceston. Numerous records were also set for total number of warm days in the month at multiple sites in Tasmania and Victoria. A Special Climate Statement about this event will be released shortly.

Maximum temperatures were above average across most of Western Australia, coastal and eastern South Australia, the southwestern half of New South Wales, all of Victoria, and all of Tasmania. Maxima were in the warmest 10% of historical observations (decile 10) for November across nearly all of Victoria, and warmest on record for nearly all of Tasmania.

Maxima were below average for eastern Queensland except the northern Cape York Peninsula, coastal northeastern New South Wales, and a large area in the inland north of the Northern Territory, extending into the adjacent eastern Kimberley. Cooler days in eastern Australia were assisted by easterly airflow across much of New South Wales, extending into Queensland, associated with the long-lived high pressure system over the Tasman Sea. Areas in eastern New South Wales and southeastern Queensland experienced runs of cooler days and nights due to the consistent easterly flow; Armidale for example had a November record number of 12 days below 22 °C.

Minimum temperatures for the month were above to very much above average across most of Western Australia, nearly all of South Australia except part of the northern border, Queensland's Channel Country, most of New South Wales except the northeast, all of Victoria, and all of Tasmania.

Minima were below average for the month in Western Australia along the Northern Territory border, in an area of the central Northern Territory, and in an area of eastern Queensland extending south from about the Central Highlands and Coalfields District, into northeastern New South Wales.


Areal average temperatures
Maximum Temperature Minimum Temperature Mean Temperature
Rank
(of 108)
Anomaly
(°C)
Comment Rank
(of 108)
Anomaly
(°C)
Comment Rank
(of 108)
Anomaly
(°C)
Comment
Australia = 78 +0.60 96 +0.79 91 +0.70
Queensland 34 −0.44 = 63 +0.19 47 −0.12
New South Wales 76 +1.25 = 90 +1.37 85 +1.31
Victoria 106 +3.36 3rd highest (record +5.13 °C in 2009) 106 +2.77 3rd highest (record +3.97 °C in 2009) 107 +3.07 2nd highest (record +4.55 °C in 2009)
Tasmania 108 +3.79 highest (was +2.09 °C in 1914) 106 +1.37 3rd highest (record +2.09 °C in 2000) 108 +2.58 highest (was +2.04 °C in 2000)
South Australia 75 +0.91 101 +1.65 8th highest 86 +1.28
Western Australia 92 +1.14 101 +0.98 8th highest 100 +1.06 9th highest
Northern Territory 50 −0.32 49 −0.19 = 46 −0.25

Rank ranges from 1 (lowest) to 108 (highest). A rank marked with ’=‘ indicates the value is tied for that rank. Anomaly is the departure from the long-term (1961–1990) average.


Temperature maps
MeanAnomalyDeciles
Mean
daily
maximum
temperatures
Map of mean daily maximum temperature Map of mean daily maximum temperature anomalies Map of mean daily maximum temperature deciles
Mean
daily
minimum
temperatures
Map of mean daily minimum temperature Map of mean daily minimum temperature anomalies Map of mean daily minimum temperature deciles
Mean
daily
temperatures
Map of mean daily temperature Map of mean daily temperature anomalies Map of mean daily temperature deciles

Rainfall

Rainfall for Australia as a whole was above average for November. Totals for the month were above to very much above average for most of the Northern Territory and South Australia. Both regions observed monthly state-wide average rainfall amongst the ten wettest on record for November. Monthly totals were in the highest 10% of historical observations (decile 1) for November in large areas. Rainfall was also above average in adjacent parts of bordering States, notably across the Kimberley in Western Australia, parts of the Gulf Country and west in Queensland, parts of southwestern and southeastern New South Wales, western Victoria, and southeastern Western Australia. Above average rainfall was also observed for parts of Western Australia in the Pilbara, Gascoyne, western inland regions, and on the south coast away from the southeast.

Monthly rainfall was below average for the eastern half of southern Victoria, spanning the east of Melbourne, parts of the ranges, and Gippsland, and for almost all of Tasmania where totals were well below average in the north and west. Significant rainfall deficiencies exist in both Tasmania and Victoria at timescales out to five months duration. A long-lived blocking high over the Tasman Sea during much of November saw persistently northerly airflow across much of these areas, and associated warm temperatures, as well as a lack of rainfall that otherwise may have resulted from passing cold fronts or onshore flow in east-facing coastal regions.

Rainfall was also below average for some scattered smaller areas across eastern Australia, notably in inland southeastern Queensland, and in pockets of Western Australia, mostly along the northwest coast and in the southwest corner.

However, some wet periods were observed in the southeast, including some heavy falls between the 15th and 17th when a large cloudband associated with a cold front and surface trough produced thunderstorms and showers leading to daily rainfall records for November at a number of sites in South Australia and western Victoria. A scattering of daily rainfall records for November were also set in eastern New South Wales for totals to 9 am on the 18th as a result of storms and showers.

Above average rainfall in the Northern Territory and South Australia was primarily the result of showers over an extended period between the 11th and 16th, on the 17th in the Top End, and between the 20th and the end of the month across the north more generally. A few daily rainfall records for November were set in both the north and south of the Northern Territory during the month.


Area-average rainfall
Rank
(of 118)
Average
(mm)
Departure
from mean
Comment
Australia 86 38.2 +17%
Queensland 62 39.0 −15%
New South Wales 58 42.0 −6%
Victoria 66 49.6 −4%
Tasmania 6 47.8 −54% 6th lowest
South Australia 112 35.0 +126% 7th highest
Western Australia 79 19.7 +11%
Northern Territory 109 69.6 +66% 10th highest
Murray-Darling Basin 61 38.6 −4%

Rank ranges from 1 (lowest) to 118 (highest). A rank marked with ’=‘ indicates the value is tied for that rank. Departure from mean is relative to the long-term (1961–1990) average.


Rainfall maps
TotalsPercentagesDeciles
Total
rainfall
Map of total rainfall Map of percentage of normal rain Map of rainfall deciles


Australian weather extremes during November 2017
Hottest day 45.1 °C    at Marble Bar (WA) on the 22nd
Coldest day 0.0 °C    at Mount Baw Baw (Vic.) on the 3rd
Coldest night −6.5 °C    at Thredbo AWS (NSW) on the 4th
Warmest night 29.8 °C    at Wittenoom (WA) on the 22nd
Wettest day 157.8 mm at Wamuran (Qld.) on the 30th


Notes

The Monthly Climate Summary is prepared to list the main features of the weather in Australia 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.

Climate Summaries are usually published on the first working day of each month.

This statement has been prepared based on information available at 1 pm EST on Friday 1 December 2017. Some checks have been made on the data, but it is possible that results will change as new information becomes available, especially for rainfall where much more data becomes available as returns are received from volunteers.

Long-term averages in this statement and associated tables are for the period 1961 to 1990 unless otherwise specified.

The system used for calculating areal averages of rainfall was changed in November 2009; the main effect was that current and historical values for Tasmania were increased. Since November 2012, ACORN-SAT has been used for calculating areal averages of temperature; the major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, and hence rankings are calculated using a larger set of years.


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