Greater Brisbane in spring 2017: wetter and warmer than usual at most locations

Spring rainfall was above average for most locations in Greater Brisbane. Both daytime and overnight temperatures were warmer than average at all locations

Above average spring rainfall at most locations

  • Overall, spring rainfall was above average at most Greater Brisbane sites
  • Spring commenced with a dry September that saw little rainfall recorded across most Brisbane locations
  • October rainfall totals tended well above average as a result of several heavy rainfall events throughout the month; record high in some locations
  • Rainfall totals in November were below to near-average, with locations recording between 40 mm and 150 mm for the month
  • Wamuran and Somerset Dam had their highest spring daily rainfall on record
  • Wamuran received 650.3 mm for spring, and was the site's highest total spring rainfall on record

Spring days and nights warmer than usual 

  • Overall, spring was warmer than usual for both mean maximum and mean minimum temperatures
  • September days were exceptionally warm, particularly at the end of the month; nights were slightly warmer than average at most sites
  • During October, daytime temperatures were near-average but nights where warmest on record in and around Brisbane
  • November temperatures were cooler than usual for both days and nights
  • Cape Moreton had its highest spring mean daily minimum temperature in 107 years

Brisbane

  • Total rainfall for Brisbane was 257.4 mm, which is 126% of the long-term average of 203.8 mm
  • The mean daily maximum temperature for Brisbane was 27.1 °C, which is 0.1 °C above the long-term average. The warmest day was 37.0 °C on 29 Sep, and the coolest day was on 21 Oct when the temperature reached 20.4 °C
  • The mean daily minimum temperature for Brisbane was 16.9 °C, which is 0.6 °C above the long-term average. The coldest morning was 8.2 °C on 6 Sep, and the warmest morning was on 12 Oct when the minimum temperature was 22.3 °C

Severe thunderstorms

  • Severe thunderstorms produced hail between 2 cm and 4 cm in diameter at Deception Bay, Kallangur, Petrie, Highvale and Greenbank on 31 October
  • On 7 November, multiple reports of large hail was observed at Beaudesert, Banyo, Brisbane Airport, Chermside and Melawondi
  • Heavy rainfall associated with a severe thunderstorm produced 80 mm of rainfall in one hour at Wamuran on 29 November

Further information

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Extremes in spring 2017
Hottest day 40.1 °C at Amberley AMO on 28 Sep
Warmest days on average 28.9 °C at University of Queensland Gatton
Coolest days on average 24.7 °C at Cape Moreton Lighthouse
Coldest day 19.2 °C at Logan City Water Treatment Plant on 21 Oct
Coldest night 0.5 °C at Amberley AMO on 9 Sep
Coolest nights on average 13.4 °C at University of Queensland Gatton
Warmest nights on average 19.2 °C at Cape Moreton Lighthouse
Warmest night 22.7 °C at Redcliffe on 11 and 12 Oct
Warmest on average overall 22.0 °C at Brisbane and Cape Moreton Lighthouse
Coolest on average overall 20.8 °C at Beaudesert Drumley Street and Redland (Alexandra Hills)
Wettest overall 650.3 mm at Wamuran
Wettest day 157.8 mm at Wamuran on 30 Nov
Strongest wind gust 91 km/h at Cape Moreton Lighthouse on 15 Oct

Record highest spring daily rainfall
New record
(mm)
Old
record
Years of
record
Somerset Dam 126.6 on 30 Nov 125.0 on 25 Oct 1949 82
Wamuran 157.8 on 30 Nov 126.0 on 1 Nov 1976 65
Buaraba 106.8 on 15 Oct 99.0 on 12 Oct 2010 62
Homeleigh 88.0 on 22 Oct 74.0 on 20 Nov 2008 59



Record highest spring total rainfall
New record
(mm)
Old
record
Years of
record
Average for
spring
Wamuran 650.3 482.3 in 2008 58 238.3



Record highest spring mean daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
spring
Cape Moreton Lighthouse 19.2 19.1 in 2002 107 17.8



Summary statistics for spring 2017
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
spring
2017
Diff
from
average
Highest for
spring
2017
Mean for
spring
2017
Diff
from
average
Lowest for
spring
2017
Total for
spring
2017
Average
for
spring
Rank of
spring
2017
Fraction of
spring
average
Amberley AMO 28.4 +0.7 40.1 28 Sep 13.5 +0.5 0.5 9 Sep 224.0 188.4 average 119%
Archerfield Airport 27.7 +0.8 37.0 29 Sep 15.4 +1.2 4.7 15 Sep 316.4 212.9 high 149%
Beaudesert Drumley Street 28.1 +0.1 39.1 28 Sep 13.5 +0.5 1.4 15 Sep 189.6 200.7 average 94%
Beerburrum Forest Station 27.7 +0.4 38.6 28 Sep 15.1 +0.8 6.8 8 Sep 424.0 256.4 high 165%
Brisbane 27.1 +0.1 37.0 29 Sep 16.9 +0.6 8.2 6 Sep 257.4 203.8 high 126%
Brisbane Aero 25.7 +0.2 34.9 29 Sep 16.4 +0.8 7.4 16 Sep 229.2 203.0 average 113%
Cape Moreton Lighthouse 24.7 +1.6 29.9 27 Oct 19.2 +1.4 12.0 15 Sep 205.4 236.6 average 87%
Logan City Water Treatment Plant     38.4 29 Sep 15.9 +0.9 7.0 9 Sep 330.0 214.2 high 154%
Redcliffe 25.7 +0.2 33.7 29 Sep 17.6 +0.7 8.7 15 Sep 227.6 216.6 average 105%
Redland (Alexandra Hills) 25.4   33.6 29 Sep 16.2   7.8 15 Sep 300.4
University of Queensland Gatton 28.9 +0.9 39.5 28 Sep 13.4 +0.5 1.9 16 Sep 223.2 178.7 high 125%
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 Greater Brisbane 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.

In September 2017 this summary was broadened to include data from observing sites in or near the Greater Brisbane “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 12 pm 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.

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