Brisbane Metro in summer 2010-11: A wet summer with severe flooding in January

  • Very much above average rainfall
  • River and flash flooding in January
  • Slightly cooler than average day time temperatures
  • Close to average night time temperatures

Rainfall

During December 2010, very much above average rainfall was recorded around the Brisbane Metro area with most rain gauges recording December totals amongst the highest 10% on record and commonly three times the long term average.

Very much above average rainfall was recorded in the Brisbane Metro area during January with the main weather stations, listed in this report, all recording at least twice their long-term monthly average rainfall. A major rain event occurred in the Brisbane Metro area between the 10th and 12th of January when an upper-level low combined with a humid easterly flow to bring very heavy rain to the area (for more information see SCS 24, page 4 and a comparison with previous events on page 7). Severe flooding, including river and flash flooding, occurred in Brisbane and nearby areas of southeast Queensland during the second week of January (for more information see SCS 24, pages, 7, 8 and 9).

During February, the total rainfall was close to the average for most metropolitan areas, while drier over the western suburbs.

For this summer, the Brisbane Metro region experienced very much above average rainfall, amongst the highest 10% on record.

The wettest overall was Redlands HRS with 966.0 mm, followed by Brisbane with 952.6 mm, then Logan City Water Treatment Plant with 945.7 mm.

The driest overall was Archerfield Airport with 758.8 mm, followed by Amberley AMO with 824.6 mm, then Brisbane Aero with 934.4 mm.

Some sites had their highest total summer rainfall on record. Some sites had their highest total summer rainfall for at least 20 years.

The wettest single day was at Brisbane Aero with 112.4 mm on 10 Jan 2011, followed by Brisbane with 110.8 mm on 10 Jan 2011, then Amberley AMO with 110.0 mm on 12 Jan 2011.

See a map of total rainfall. See a map of rainfall deciles.

Temperature

For this summer, the Brisbane Metro seasonal mean maximum temperatures were only 0 to 1 C cooler than the long-term means, with the mean minimum temperatures 0 to 1 C warmer than their corresponding means.

The warmest on average was Brisbane with 25.2 C, followed by Redcliffe with 24.9 C, then Logan City Water Treatment Plant with 24.8 C.

The coolest on average was Amberley AMO with 24.5 C, followed by Brisbane Aero with 24.6 C, then Archerfield Airport with 24.7 C.

Maximum temperature

The hottest day was at Amberley AMO with 36.0 C on 18 Jan 2011, followed by Amberley AMO with 35.7 C on 20 Feb 2011, then Brisbane with 35.3 C on 20 Feb 2011.

The warmest days on average were at Amberley AMO with 29.5 C, followed by Brisbane with 29.3 C, then Archerfield Airport with 29.1 C.

The coolest days on average were at Brisbane Aero with 28.1 C, followed by Redcliffe with 28.3 C, then Logan City Water Treatment Plant with 28.9 C.

The coldest day was at Amberley AMO with 22.5 C on 4 Dec 2010, followed by Redcliffe with 23.0 C on 22 Dec 2010, then Amberley AMO with 23.0 C on 26 Dec 2010.

See a map of mean maximum temperatures. See a map of maximum temperature anomalies.

Minimum temperature

The coldest night was at Amberley AMO with 10.1 C, followed by Archerfield Airport with 12.5 C, then Redlands HRS with 12.8 C all on 21 Dec 2010.

The coolest nights on average were at Amberley AMO with 19.6 C, followed by Archerfield Airport with 20.3 C, then Logan City Water Treatment Plant with 20.8 C.

The warmest nights on average were at Redcliffe with 21.6 C, followed by Brisbane with 21.1 C, then Brisbane Aero with 21.1 C.

The warmest night was at Redcliffe with 25.3 C on 3 Feb 2011, followed by Redcliffe with 25.3 C on 5 Feb 2011, then Redcliffe with 25.3 C on 6 Feb 2011.

See a map of mean minimum temperatures. See a map of minimum temperature anomalies.

Wind

The strongest wind gust was 96 km/h on 18 Jan 2011, followed by 91 km/h on 16 Dec 2010, then 80 km/h on 21 Feb 2011 all happened at Amberley AMO.

Further information

Media
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Extremes in summer 2010-11
Hottest day 36.0 C at Amberley AMO on 18 Jan 2011
35.7 C at Amberley AMO on 20 Feb 2011
35.3 C at Brisbane on 20 Feb 2011
35.3 C at Amberley AMO on 21 Feb 2011
Warmest days on average 29.5 C at Amberley AMO
29.3 C at Brisbane
29.1 C at Archerfield Airport
Coolest days on average 28.1 C at Brisbane Aero
28.3 C at Redcliffe
28.9 C at Logan City Water Treatment Plan
Coldest day 22.5 C at Amberley AMO on 4 Dec 2010
23.0 C at Redcliffe on 22 Dec 2010
23.0 C at Amberley AMO on 26 Dec 2010
Coldest night 10.1 C at Amberley AMO on 21 Dec 2010
12.5 C at Archerfield Airport on 21 Dec 2010
12.8 C at Redlands HRS on 21 Dec 2010
Coolest nights on average 19.6 C at Amberley AMO
20.3 C at Archerfield Airport
20.8 C at Logan City Water Treatment Plant
Warmest nights on average 21.6 C at Redcliffe
21.1 C at Brisbane
21.1 C at Brisbane Aero
Warmest night 25.3 C at Redcliffe on 3 Feb 2011
25.3 C at Redcliffe on 5 Feb 2011
25.3 C at Redcliffe on 6 Feb 2011
Warmest on average overall 25.2 C at Brisbane
24.9 C at Redcliffe
24.8 C at Logan City Water Treatment Plant
Coolest on average overall 24.5 C at Amberley AMO
24.6 C at Brisbane Aero
24.7 C at Archerfield Airport
Wettest overall 966.0 mm at Redlands HRS
952.6 mm at Brisbane
945.7 mm at Logan City Water Treatment Plant
Driest overall 758.8 mm at Archerfield Airport
824.6 mm at Amberley AMO
934.4 mm at Brisbane Aero
Wettest day 112.4 mm at Brisbane Aero on 10 Jan 2011
110.8 mm at Brisbane on 10 Jan 2011
110.0 mm at Amberley AMO on 12 Jan 2011
Highest wind gust 96 km/h at Amberley AMO on 18 Jan 2011
91 km/h at Amberley AMO on 16 Dec 2010
80 km/h at Amberley AMO on 21 Feb 2011

Record highest total summer rainfall
Total rainfall
for summer 2010-11 (mm)
Previous wettest
for summer
Years of
record
Average for
summer
Amberley AMO 824.6 801.2 in 1973 68 362.2

Highest total summer rainfall for at least 20 years
Total rainfall
for summer 2010-11 (mm)
Most recent summer
at least this wet
Years since
wetter
Average for
summer
Archerfield Airport 758.8 870.9 in 1973 34 415.2
Redlands HRS 966.0 1162.4 in 1973 29 477.0



Summary statistics for summer 2010-11
Maximum temperatures
for summer
(C)
Minimum temperatures
for summer
(C)
Rainfall
for summer
(millimetres)
Mean for
summer
2010-11
Diff
from
average
Highest for
summer
2010-11
Mean for
summer
2010-11
Diff
from
average
Lowest for
summer
2010-11
Total for
summer
2010-11
Average
for
summer
Rank of
summer
2010-11
Fraction of
summer
average
Moreton South Coast (district 40)
Amberley AMO 29.5 -1.3 36.0 18 Jan 2011 19.6 +0.4 10.1 21 Dec 2010 824.6 362.2 highest 228%
Archerfield Airport 29.1 -0.8 34.9 20 Feb 2011 20.3 +0.5 12.5 21 Dec 2010 758.8 415.2 v high 183%
Brisbane 29.3 -0.6 35.3 20 Feb 2011 21.1 +0.1 14.7 21 Dec 2010 952.6 415.2 v high 229%
Brisbane Aero 28.1 -0.7 33.5 18 Jan 2011 21.1 +0.3 13.4 21 Dec 2010 934.4 401.2 v high 233%
Logan City Water Treatment Plant 28.9 -0.5 35.2 20 Feb 2011 20.8 +0.8 13.1 21 Dec 2010 945.7 426.1 v high 222%
Redcliffe 28.3   31.8 20 Feb 2011 21.6   13.5 21 Dec 2010

Notes

A Seasonal Climate Summary is prepared to list the main features of the weather in Brisbane Metro 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 10 am on Tuesday 1 March 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 9 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.

No instruments from the QLD flood warning network (recognised as TM or Alert), have been used in producing daily rainfall information in this report.

Further information

Media
(03) 9669 4057
Enquiries