Brisbane Metro in spring 2013: Average rainfall, warm spring with record-breaking heat



Spring Rainfall

The highest spring rainfall total was recorded at Logan City Water Treatment Plant with 204.1 mm.  The wettest day (highest daily total) was recorded at Amberley with 52.0 mm on 24th November due to a severe thunderstorm sweeping through the greater Brisbane area on the 23rd.
The rainfall totals for spring ranged from 140 mm (Brisbane city) to 204.1 mm (Logan City Water Treatment Plant), however the long term spring average for the Brisbane metropolitan stations range from 190 mm in the west (Amberley) to 225 mm in exposed coastal sites (Redcliffe). 

September:
Average rainfall was recorded at Amberley, Archerfield, Brisbane Airport and Redcliffe. Brisbane and Logan received below average rainfall.
The wettest overall was Redcliffe with 28.6 mm.  Redcliffe also had the highest daily rainfall total of 26.6 mm on the 17th, due to a downpour associated with thunderstorms on the evening of the 16th.

October:
Below average rainfall was recorded at all Brisbane metropolitan stations. The highest monthly rainfall was recorded at Redcliffe, with 24.6 mm, closely followed by the Brisbane City station with 22.6 mm.
Brisbane Airport had its lowest total October rainfall since records began in 1994. The previous Brisbane Airport station still maintains the long term record, with the lowest rainfall for October of 4.0 mm in 1992 (this station is no longer open).
The highest daily total was on the 30th, with Redcliffe receiving 18.0 mm and Logan City Water Treatment Plant with 14.2 mm on the 30th.  Thunderstorms swept through the southeast, with much of the daily total falling between 2 pm and 6:30 pm on the 29th.

November:
Little or no rain fell in the Brisbane Metropolitan area until the 10th, with daily totals to 9am on the 11th varying from 3.8 mm (in Redcliffe) to 18.6 mm (in Logan).  Severe thunderstorms swept through the area on the afternoon of the 10th, with some 2 - 4 cm diameter hail reported at Logan City.  Thunderstorms were observed for the following seven days (12th - 18th inclusive) in the Brisbane Metropolitan area, with some locally moderate to heavy falls resulting (though there were no rainfall records broken).
More severe thunderstorms were observed in the Brisbane Metropolitan area on the 23rd, with reports of hail 2 cm in diameter from Leichardt (near Ipswich) along with a wind gust of 92 km/hr at Amberley and multiple reports of damage to or lose of rooves near and west of Ipswich.  The wettest day occurred on the 23rd, with the highest daily rainfall to 9am on the 24th at Amberley with 52mm and Logan City with 37.4 mm.
The following day (24th), severe thunderstorms occurred over the Brisbane Metropolitan area, with reports of hail 2 cm in diameter observed at Spring Hill and Oxley, and larger hail the size of 'golf balls' observed at Wynnum West and Hemmant, though daily rainfall totals of up to 10 mm were recorded.The highest monthly rainfall was recorded at Logan City Water Treatment Plant with 167.3 mm, then at Amberley with 121.2 mm.  Brisbane Aero recorded 115.2 mm, while the Brisbane city recorded 104.8 mm.  The average November rainfall for the Brisbane metropolitan area ranges from 80 mm (around the Amberley/Ipswich area) to 110 mm (Logan and Brisbane).

Temperature

SPRING:
The warmest on average was Brisbane with 22.4 C, and the coolest on average was Brisbane Aero with 21.3 C.  Logan City Water Treatment Plant had its  highest spring mean temperature on record.

September:  Amberley, Logan and Archerfield had their highest September mean temperature on record.  The exceptionally warm conditions are widespread across the state.Both maximum and minimum temperatures were above average for all sites in Brisbane metro.

October: Logan City had its highest October mean temperature on record, with 22.3 C (long term average is 20.6 C). The warmest on average was Brisbane with 22.9 C

November: The highest mean temperature (maximum + minimum / 2) was recorded at Brisbane with 23.3 C, closely followed by Amberley with 23.2 C.

Maximum Temperature

SPRING:
The hottest day was at Amberley with 37.8 C on the 7th of October, closely followed by Logan City Water Treatment Plant with 37.7 C, also on the 7th of October.
The warmest days on average were at Amberley with 30.2 C and the coolest days on average were at Redcliffe with 26.2 C.
The coldest day was at Amberley with 20.4 C on 16th September.  Amberley and Archerfield had their highest spring mean daily maximum temperature on record.


September: Maximum temperatures were above average for all Brisbane metro sites. On the 11th,  Logan had its highest September temperature on record.
The hottest day was at Amberley AMO with 34.7 C on the 19th.

October: The Brisbane City station recorded a mean maximum temperature of 28.8 C - which is a new record - beating the previous 1918 record of 28.7C
The hottest day was at Amberley AMO with 37.8 C on the 7th, and the warmest days on average were also at Amberley AMO with 30.9 C. Logan City had its highest October temperature on record, while Logan City and Brisbane City had their highest October mean daily maximum temperature on record.

November: The hottest day (highest maximum temperature) was recorded at Amberley AMOwith 36.8 C on the 3rd, well above the long term November average of 29.5 C.  Amberley also had the warmest days on average with 30.8 C. The coldest day (lowest maximum) was at Redcliffe with 22.6 Con the last day of the month (30th November). 


Minimum Temperature

SPRING:
The coldest night (lowest minimum) was at Amberley AMO with 4.6 C on the 6th of September, while it also experienced the coolest nights on average with 13.0 C. The warmest nights on average were at Redcliffe with 17.3 C and Redcliffe as had the warmest night (highest minimum) with 22.4 C on the 13th of November

September: Minimum temperatures were above average for all Brisbane metro sites. 
The coldest night was at Amberley AMO with 4.6 C on the 6th.

October: Most stations had overnight temperatures that were slightly above average, with Amberley slightly below average. The coldest night was at Amberley with 4.7 C on the 4th, while the warmest night (highest minimum) was at Redcliffe with 17.5 C.  Logan City had its highest October mean daily minimum temperature on record . The warmest night (highest minimum) was at Redcliffe with 22.4 C on the 13th, over 4 C below the long term average of 18.2 C.

November: The coldest night (lowest minimum) was at Amberley AMO with 10.0 C on the 6th, well below the long term monthly average of 15.3 C.

Wind

The strongest wind gust was at Amberley with 93 km/h on 23rd of November due to a severe thunderstorm passing through the area.



Extremes in spring 2013
Hottest day 37.8 C at Amberley AMO on 7 Oct on 3 Nov
Warmest days on average 30.2 C at Amberley AMO
Coolest days on average 26.2 C at Redcliffe
Coldest day 20.4 C at Amberley AMO on 16 Sep
Coldest night 4.6 C at Amberley AMO on 6 Sep
Coolest nights on average 13.0 C at Amberley AMO
Warmest nights on average 17.3 C at Redcliffe
Warmest night 22.4 C at Redcliffe on 13 Nov
Warmest on average overall 22.4 C at Brisbane
Coolest on average overall 21.3 C at Brisbane Aero
Wettest overall 204.1 mm at Logan City Water Treatment Plant
Wettest day 52.0 mm at Amberley AMO on 24 Nov
Highest wind gust 93 km/h at Amberley AMO on 23 Nov

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 mean daily maximum temperature

Mean daily maximum
temperature
for spring 2013 (C)
Previous warmest
for spring
Years of
record
Average for
spring
Amberley AMO 30.2 29.9 in 2002 72 27.6
Archerfield Airport 29.0 28.5 in 1988 37 26.8



Record highest spring mean temperature

Mean daily
temperature
for spring 2013 (C)
Previous warmest
for spring
Years of
record
Average for
spring
Logan City Water Treatment Plant 21.8 21.7 in 2009 20 20.6


* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.




Summary statistics for spring 2013

Maximum temperatures
for spring
(C)
Minimum temperatures
for spring
(C)
Rainfall
for spring
(millimetres)
Mean for
spring
2013
Diff
from
average
Highest for
spring
2013
Mean for
spring
2013
Diff
from
average
Lowest for
spring
2013
Total for
spring
2013
Average
for
spring
Rank of
spring
2013
Fraction of
spring
average
Moreton South Coast (district 40)
Amberley AMO 30.2 +2.6 37.8 7 Oct 13.0 0.0 4.6 6 Sep 160.4 189.1 average 85%
Archerfield Airport 29.0 +2.2 36.6 7 Oct 15.0 +0.9 7.3 6 Sep 151.4 213.4 average 71%
Brisbane 28.2 +1.4 34.7 7 Oct 16.7 +0.5 10.9 21 Sep 140.6 210.1 low 67%
Brisbane Aero 26.4 +1.0 32.2 3 Oct 16.3 +0.8 10.6 6 Sep 150.0 204.5 average 73%
Logan City Water Treatment Plant 28.0 +1.6 37.7 7 Oct 15.9 +1.0 9.5 6 Sep 204.1 218.9 average 93%
Redcliffe 26.2 +0.8 32.5 3 Oct 17.3 +0.5 11.6 6 Sep 166.4 224.2 average 74%

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 Monday 2 December 2013. 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.

Further information

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