Tuesday, 1 December 2009 - Seasonal Climate Summary for Brisbane Metro - Product code IDCKGC24R0

Brisbane Metro in spring 2009: 

• Below average rainfall for most areas.
• Day time temperatures above average.
• A severe duststorm event on the 23rd September. 

Details Extremes Maps Records Summaries Important notes the top

Duststorms

An exceptional duststorm developed over the interior during the 22nd of September with very marked reductions in visibility in the thick dust that reached the Brisbane area during the 23rd. Transport services were interrupted, particularly the the river traffic and aircraft operations.

Another frontal passage on the 26th and 27th triggered duststorms again, particularly over western districts.  This event was less dramatic but again brought widespread dust to the east coast.

Rainfall

Rainfall was generally lower than the amount normally received during spring for most locations.  

The main event contributions to the spring total were during the 1st week in September, on the 12th and 13th October and later in the same month and finally during thunderstorms and the passgae of an upper trough in early in November.  Some locations also recorded useful falls during thunderstorms late in November.

The wettest overall was 193.0 mm at Amberley AMO, followed by 150.6 mm at Redcliffe, followed by 146.4 mm at Logan City Water Treatment.

The driest overall was 105.4 mm at Brisbane Aero, followed by 108.4 mm at Archerfield Airport, followed by 112.2 mm at Brisbane.

The wettest single day 67.2 mm at Amberley AMO on 6 Nov, followed by 62.0 mm at Redcliffe on 27 Oct, followed by 58.8 mm at Brisbane Aero on 27 Oct.

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

Maximum temperatures

Maximum temperatures were above the spring average at most locations with late November being well above average.  

The 17th of November was also particularly hot as winds turned offshore with the approach of a front. Amberley recorded 40.3 °C, this being only the 2nd time since 1996 that Amberley has cracked 40 °C in November. On the 29th of November 2006 they recorded 40.5 °C.

The hottest day was 40.3 °C at Amberley AMO on 17 Nov, followed by 39.0 °C at Amberley AMO on 29 Nov, followed by 38.1 °C at Amberley AMO on 4 Nov.

The warmest days on average were 29.5 °C at Amberley AMO, followed by 28.4 °C at Archerfield Airport, followed by 28.2 °C at Logan City Water Treatment.

The coolest days on average were 26.3 °C at Redcliffe, followed by 26.8 °C at Brisbane Aero, followed by 28.0 °C at Brisbane.

The coldest day was 20.7 °C at Logan City Water Treatment on 11 Oct, followed by 20.9 °C at Redcliffe on 11 Oct, followed by 21.2 °C at Redcliffe on 1 Sep, followed by 21.2 °C at Amberley AMO on 11 Oct.

Some sites had their highest spring mean daily maximum temperature for at least 20 years. See a map of mean maximum temperatures. See a map of maximum temperature anomalies.

Minimum temperatures

Minimum temperatures were close to the spring average with no frosts reported.

The coldest night was 0.0 °C at Logan City Water Treatment on 8 Sep, followed by 1.7 °C at Amberley AMO on 1 Sep, followed by 2.8 °C at Amberley AMO on 29 Sep.

The coolest nights on average were 12.3 °C at Amberley AMO, followed by 14.6 °C at Archerfield Airport, followed by 15.1 °C at Logan City Water Treatment.

The warmest nights on average were 16.9 °C at Redcliffe, followed by 16.2 °C at Brisbane, followed by 15.6 °C at Brisbane Aero.

The warmest night was 24.0 °C at Logan City Water Treatment on 29 Nov, followed by 24.0 °C at Redcliffe on 29 Nov, followed by 23.9 °C at Brisbane Aero on 20 Nov, followed by 23.9 °C at Brisbane on 29 Nov, followed by 23.8 °C at Brisbane Aero on 29 Nov.

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

Wind

Thunderstorms were the cause of the highest wind gusts.

The strongest wind gust was 93 km/h at Brisbane on 13 Oct, followed by 83 km/h at Redcliffe on 17 Nov, followed by 76 km/h at Amberley AMO on 5 November.

---

Extremes in spring 2009
Hottest day	40.3 °C at Amberley AMO on 17 Nov 39.0 °C at Amberley AMO on 29 Nov 38.1 °C at Amberley AMO on 4 Nov
Warmest days on average	29.5 °C at Amberley AMO 28.4 °C at Archerfield Airport 28.2 °C at Logan City Water Treatment
Coolest days on average	26.3 °C at Redcliffe 26.8 °C at Brisbane Aero 28.0 °C at Brisbane
Coldest day	20.7 °C at Logan City Water Treatment on 11 Oct 20.9 °C at Redcliffe on 11 Oct 21.2 °C at Redcliffe on 1 Sep 21.2 °C at Amberley AMO on 11 Oct
Coldest night	0.0 °C at Logan City Water Treatment on 8 Sep 1.7 °C at Amberley AMO on 1 Sep 2.8 °C at Amberley AMO on 29 Sep
Coolest nights on average	12.3 °C at Amberley AMO 14.6 °C at Archerfield Airport 15.1 °C at Logan City Water Treatment
Warmest nights on average	16.9 °C at Redcliffe 16.2 °C at Brisbane 15.6 °C at Brisbane Aero
Warmest night	24.0 °C at Logan City Water Treatment on 29 Nov 24.0 °C at Redcliffe on 29 Nov 23.9 °C at Brisbane Aero on 20 Nov 23.9 °C at Brisbane on 29 Nov 23.8 °C at Brisbane Aero on 29 Nov
Wettest overall	193.0 mm at Amberley AMO 150.6 mm at Redcliffe 146.4 mm at Logan City Water Treatment
Driest overall	105.4 mm at Brisbane Aero 108.4 mm at Archerfield Airport 112.2 mm at Brisbane
Wettest day	67.2 mm at Amberley AMO on 6 Nov 62.0 mm at Redcliffe on 27 Oct 58.8 mm at Brisbane Aero on 27 Oct
Highest wind gust	93 km/h at Brisbane on 13 Oct 83 km/h at Redcliffe on 17 Nov 76 km/h at Amberley AMO on 5 Nov

Details Extremes Maps Records Summaries Important notes the top

---

Highest spring mean daily maximum temperature for at least 20 years
	Mean daily maximum temperature for spring 2009 (°C)	Most recent higher for spring		Years since higher	Average for spring
Archerfield Airport	28.4	28.5	in 1988	20	26.7

Details Extremes Maps Records Summaries Important notes the top

---

Summary statistics for spring 2009
	Maximum temperatures for spring (°C)				Minimum temperatures for spring (°C)				Rainfall for spring (millimetres)
	Mean for spring 2009	Diff from average	Highest for spring 2009		Mean for spring 2009	Diff from average	Lowest for spring 2009		Total for spring 2009	Average for spring	Rank of spring 2009	Fraction of spring average
Moreton South Coast (district 40)
Amberley AMO	29.5	+1.9	40.3	17 Nov	12.3	-0.8	1.7	1 Sep	193.0	189.0	average	102%
Archerfield Airport	28.4	+1.7	38.0	17 Nov	14.6	+0.6	4.9	1 Sep	108.4	214.1	low	51%
Brisbane*	28.0	+2.0	35.0	13 Oct	16.2	+0.6	8.5	1 Sep	112.2	218.5	low	51%
Brisbane Aero*	26.8	+1.2	34.8	3 Oct	15.6	+0.2	5.2	1 Sep	105.4	225.8	low	47%
Logan City Water Treatment	28.2	+2.0	37.5	17 Nov	15.1	+0.3	0.0	8 Sep	146.4	227.4	low	64%
Redcliffe*	26.3	+1.0	34.7	3 Oct	16.9	+0.6	8.9	1 Sep	150.6	203.4	low	74%

Details Extremes Maps Records Summaries Important notes the top

---

---