Brisbane in April 2015: Some cold nights; well above-average rainfall

  • Heavy rainfall at Brisbane Airport at the start of the month
  • Cold nights on the 20th and 21st
  • Well above-average rainfall at all Brisbane metropolitan sites

A slow-moving surface trough through the interior of the State, along with an upper level disturbance over southern Queensland at the start of the month, generated heavy rainfall in the Brisbane metropolitan area. Some daily rainfall totals exceeded 100 mm recorded to 9am on the 1st - including Brisbane Airport with 126.2 mm, its highest daily rainfall on record for April. Rainfall continued across Brisbane until the 5th.  More rain fell across Brisbane between the 18th and 20th as a surface trough extended along the east coast and southeast of Queensland. A surface trough and upper level disturbance over southern Queensland generated brought light rainfall to the Brisbane metropolitan area at the end of the month. Brisbane Airport also recorded its highest monthly rainfall in 20 years.

Daytime temperatures were cool on the 1st, and then temperatures returned to near-average for the first half of the month, with the warmest day in the Brisbane metropolitan area occurring on the 6th. Very cold days were experienced on the 20th and 21st, as cold and dry southerly air entered the State  and all metropolitans site recorded daytime temperature between 5 and 6 C below average. Cold days also occurred at the end of the month.

Overnight temperatures were warmer than average in the first week of the month, before several days of cold nights between the 8th and 17th. Warm overnight conditions returned until the 20th, before a run of colder than usual nights to the end of the month.

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Extremes in April 2015
Hottest day 30.5 C at Logan City Water Treatment Plant on the 6th
Warmest days on average 26.3 C at Archerfield Airport
Coolest days on average 25.4 C at Redcliffe
Coldest day 17.4 C at Amberley AMO on the 30th
Coldest night 6.2 C at Amberley AMO on the 27th
Coolest nights on average 13.5 C at Amberley AMO
Warmest nights on average 17.4 C at Redcliffe
Warmest night 22.0 C at Redcliffe on the 5th
Warmest on average overall 21.8 C at Brisbane
Coolest on average overall 19.9 C at Amberley AMO
Wettest overall 219.4 mm at Brisbane Aero
Driest overall 102.4 mm at Amberley AMO
Wettest day 126.2 mm at Brisbane Aero on the 1st
Strongest wind gust 72 km/h at Brisbane Aero on the 26th

Record highest April daily rainfall
New record
(mm)
Old
record
Years of
record
Brisbane Aero 126.2 on the 1st 125.4 on the 29th in 2012 20



Record highest April total rainfall
New record
(mm)
Old
record
Years of
record
Average for
April
Brisbane Aero 219.4 192.2 in 1998 20 82.8



Record lowest April daily maximum temperature
New record
(C)
Old
record
Years of
record
Average for
April
Logan City Water Treatment Plant 18.4 on the 30th 20.0 on the 28th in 2012 23 26.4
Brisbane Aero 19.9 on the 30th 20.1 on the 28th in 2012 21 26.0



Summary statistics for April 2015
Maximum temperatures
(C)
Minimum temperatures
(C)
Rainfall
(millimetres)
Mean for
April
2015
Diff
from
average
Highest for
April
2015
Mean for
April
2015
Diff
from
average
Lowest for
April
2015
Total for
April
2015
Average
for
April
Rank of
April
2015
Fraction of
April
average
Amberley AMO 26.2 -1.0 30.2 6th 13.5 -0.5 6.2 27th 102.4 56.3 high 182%
Archerfield Airport 26.3 -0.2 30.4 6th 15.6 +0.5 10.2 27th 115.2 80.3 high 143%
Brisbane 26.2 -0.9 29.4 25th 17.1 -0.2 11.1 27th 146.2 70.8 high 206%
Brisbane Aero 25.6 -0.4 29.9 7th 16.5 +0.1 10.5 27th 219.4 82.8 highest 265%
Logan City Water Treatment Plant 26.0 -0.4 30.5 6th 15.9 -0.1 9.5 22nd 199.4 87.1 v high 229%
Redcliffe 25.4 -0.5 28.9 5th 17.4 -0.3 11.3 22nd 150.6 111.2 average 135%

Daily maximum temperatures for April 2015
123456789101112131415161718192021222324252627282930
Amberley AMO24.527.526.927.828.430.229.026.725.926.826.828.127.227.127.428.027.828.129.520.820.624.025.128.328.923.224.825.123.817.4
Archerfield Airport24.127.127.328.628.630.428.426.627.027.126.728.227.027.027.128.328.228.229.121.021.723.725.427.629.023.525.125.124.717.7
Brisbane24.826.727.728.528.528.426.526.927.226.528.727.026.626.328.228.027.729.021.321.323.825.728.329.423.423.618.0
Brisbane Aero24.826.427.327.828.628.029.926.324.725.625.826.126.025.925.826.026.627.527.421.721.723.624.326.727.623.424.024.422.819.9
Logan City Water Treatment Plant24.126.527.327.629.930.528.727.626.525.925.626.826.126.326.026.827.127.529.021.022.524.625.427.429.423.525.324.522.918.4
Redcliffe24.526.327.327.328.927.828.326.324.525.125.425.525.525.425.926.026.927.327.722.622.222.724.826.527.423.323.422.620.0
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for April 2015
123456789101112131415161718192021222324252627282930
Amberley AMO18.417.320.220.220.914.620.210.28.812.516.212.315.112.614.012.613.015.416.319.311.49.27.112.09.210.26.28.57.813.9
Archerfield Airport18.518.520.820.321.116.721.714.312.614.118.414.216.614.215.614.115.217.318.519.313.411.110.913.812.916.210.211.510.616.0
Brisbane19.119.321.021.021.717.216.814.116.819.016.718.416.817.716.717.118.619.319.714.612.012.815.615.516.711.116.6
Brisbane Aero19.218.921.121.421.316.221.615.511.915.818.916.217.616.217.516.316.518.819.219.713.311.611.114.715.015.210.513.113.616.4
Logan City Water Treatment Plant18.318.520.520.321.416.121.414.312.015.118.015.417.115.416.115.516.116.418.519.013.09.511.014.414.415.111.013.013.716.2
Redcliffe19.019.421.221.622.017.621.615.613.517.119.516.618.416.818.217.417.620.819.620.314.311.312.315.515.417.812.714.716.9
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 C Grey outline marks highest
and lowest for the period

Daily rainfall for April 2015
123456789101112131415161718192021222324252627282930
Alderley 91.4 45.4 2.0 9.4 13.8
Amberley AMO 28.4 4.2 31.6 4.4 18.8 - - - - - - - - - - - - 0.6 - 9.8 3.0 - - - - - - - - 1.6
Archerfield Airport 57.8 5.4 30.2 6.2 3.4 - - 0.2 - - - - - - - - - 0.8 0.8 6.8 1.6 - - - - - - - - 2.0
Boondall 91.0 25.4 43.4 1.6 3.8 - - - - - - - - - - - - 2.4 - 2.4 4.8 - - - - - - - - 15.8
Brisbane 68.2 8.8 38.4 0.4 1.8 - - - - - - - - - - 0.2 - 3.4 0.4 14.6 2.0 0.2 - - - - - -
7.8
Brisbane Aero 126 10.0 44.0 7.2 2.2 - - - - - - - - - - 0.2 - 4.8 - 2.4 3.6 - - - - - - - - 18.8
Brisbane Botanic Gardens Mt Coot-Tha 73.6 8.0 41.0 1.0 3.0 - - - - - 0.2 - - - - - - 3.8 2.8 3.0 10.0 - - - - - - - - 4.0
Hilltop Gardens 81.2 17.0 42.0 1.0 4.0













12.0 3.0




-

16.0
Logan City Water Treatment Plant 89.0 8.4 73.0 4.6 13.2 - - - - - - - - - - - - - - 3.5 2.5 - - - - - - - - 5.2
Mt Nebo Post Office 30.8 41.4 39.2 2.4 8.0 - - - - - - - - - - 1.0 - - 2.4 12.4 4.2 - - - - - - - - 5.0
Redcliffe 53.0 28.6 34.8 3.0 4.8 - - - - - - - - - - - - - - - 12.2 - - - - - - -
14.2
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

A Monthly Climate Summary is prepared to list the main features of the weather in Brisbane 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.

A Climate Summary is generally published on the first working day of each month.

This statement has been prepared based on information available at 9 am on Friday 1 May 2015. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

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.

The ACORN-SAT dataset is used for temperature area averages.

Further information

Media
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