Monday, 2 November 2009 - Monthly Climate Summary for Northern Territory - Product code IDCKGC12R0

Northern Territory in October 2009
Darwin sizzles!

October days were warmer than usual in the Darwin-Daly District this year, but close to average elsewhere. Minimums were mostly cooler than normal, and it was also drier, most notably in the Darwin-Daly District.

Darwin

Maximum temperatures were unusually warm in Darwin this October, with Darwin recording it's warmest month on record.The average maximum temperature was 34.8°C at Darwin Airport, which is 1.6°C greater than the long-term mean, and the highest mean maximum temperature recorded in any month for Darwin. The daily maximum temperature during the month reached 35.0°C on 13 days, the highest on record for any month, and there were another 4 days with 34.9°C. The 38.0°C recorded on the 18th was the second highest daily maximum temperature on record at Darwin Airport, while the 37.8°C the previous day ranks equal third. In contrast, minimums were just below average. Darwin was drier than normal for October, with the monthly total rainfall of 33.4 mm just less than half the long-term October average of 69.2 mm.

Alice Springs

Alice Springs was also drier than normal for October, with zero rainfall recorded (the long-term October average for Alice is 21.4 mm). Maximum temperatures were close to normal, with an average of 30.9°C. Minimum temperatures were cooler than normal, with an average minimum of 13.1°C being 1.7°C lower than the long-term average for October.


An archive of previous monthly summaries for Northern Territory is also available, as are summaries for other states and many other climate summaries and diagnostics.

 

Rainfall

The Territory was generally drier than normal for the first month of this wet season, most notably in the Darwin-Daly District. A handful of stations recorded rainfall values in the lowest decile for October. Some areas were close to the long-term average, while in contrast the northwest of the Tiwi Islands was wetter than normal.

The area-averaged rainfall over the whole of the Territory was 2.8 mm which is 16.3 mm less than the long-term average of 19.1 mm.

The wettest overall was 82.2 mm at Pirlangimpi AWS, followed by 64.8 mm at Karama, and 64.0 mm at Adelaide River Post Office.

The wettest single day 62.0 mm at Edith Farms Road on the 21st, followed by 53.2 mm at Point Fawcett AWS on the 21st, and 53.0 mm at Adelaide River Post Office on the 5th.

One site had their lowest total October rainfall on record.


Maximum temperature

Maximum temperatures were mixed across the Territory in October. Most of the Darwin-Daly District saw maximum temperatures of up to 2°C greater than climatology. In contrast, the Barkly District and the eastern half the Alice Springs District saw maximums a little below the long-term mean.

The area-averaged maximum temperature was 34.6°C, which was 0.1°C warmer than the long-term October average of 34.5°C.

The hottest day was 42.4°C at Walungurru AWS on the 31st, followed by 41.9°C at Kidman Springs on the 15th, and 41.8°C again at Kidman Springs on the 28th.

The warmest days on average were 39.1°C at Bradshaw AWS, followed by 39.0°C at Douglas River, and 38.8°C at Kidman Springs.

The coolest days on average were 30.0°C at Kulgera, followed by 30.9°C at Alice Springs Airport.

The coldest day was 20.9°C at Kulgera on the 2nd, followed by 21.0°C at Curtin Springs on the 1st, and 21.7°C at Yulara Aero AWS on the 2nd.

Some sites had their highest October temperature on record.

Some sites had their highest October mean daily maximum temperature on record.


Minimum temperature

Minimum temperatures were cooler than usual across most of the Territory this October, with several stations recording minimums up to 2°C below the long-term average, and some areas in the east experiencing minimums of 2°C to 3°C cooler than climatology.

The area-averaged minimum temperature was 18.9°C, which was 1.2°C lower than the long-term average of 20.1°C.

The coldest night was 5.7°C at Watarrka on the 2nd, followed by 6.3°C at Alice Springs Airport on the 18th, and 6.6°C at Yulara Aero AWS on the 3rd.

The coolest nights on average were 13.1°C at Alice Springs Airport, followed by 13.8°C at Territory Grape Farm AWS, and 14.2°C at Curtin Springs.

The warmest nights on average were 25.8°C at Cape Don AWS, followed by 25.4°C at both Dum In Mirrie AWS and Warruwi.

The warmest night was 29.5°C at Bradshaw AWS on the 4th, followed by 28.4°C at Dum In Mirrie AWS on the 27th, and 28.2°C at both Wave Hill on the 16th and Point Fawcett on the 27th.

Some sites had their lowest October temperature on record.

One site had their warmest October night (highest daily minimum temperature) on record.

Some sites had their lowest October mean daily minimum temperature on record.


Wind

The strongest wind gust recorded was 85 km/h at Alice Springs Airport on the 1st, followed by 74 km/h at both Territory Grape Farm AWS on the 1st and Jervois on the 25th, and 72 km/h was recorded at Centre Island on the 16th.

 

Further information

NT Climate Services Centre
Bureau of Meteorology
Phone (08) 8920 3813
Email climate.nt@bom.gov.au

Extremes

Hottest day
Highest temperature
42.4°C at Walungurru AWS on the 31st
Warmest days on average
Highest mean daily maximum temperature
39.1°C at Bradshaw AWS
Coolest days on average
Lowest mean daily maximum temperature
30.0°C at Kulgera
Coldest day
Lowest daily maximum temperature
20.9°C at Kulgera on the 2nd
Coldest night
Lowest temperature
5.7°C at Watarrka on the 2nd
Coolest nights on average
Lowest mean daily minimum temperature
13.1°C at Alice Springs Airport
Warmest nights on average
Highest mean daily minimum temperature
25.8°C at Cape Don AWS
Warmest night
Highest daily minimum temperature
29.5°C at Bradshaw AWS on the 4th
Wettest overall
Highest total rainfall
82.2 mm at Pirlangimpi AWS
Wettest day
Highest daily rainfall
62.0 mm at Edith Farms Road on the 21st
Highest wind gust
85 km/h at Alice Springs Airport on the 1st

Records

Record lowest total October 2009 rainfall
Total rainfall
(mm)
Previous lowest
Years of
record
Shoal Bay 4.2 5.7 in 2004 12



Record highest October 2009 temperature
Highest temperature (°C) Previous highest
Years of
record
Black Point 36.1 on the 19th = 36.1 on the 22nd in 2008 17
Dum In Mirrie AWS 38.0 on the 18th 37.7 on the 23rd in 2008 11
Point Fawcett AWS 36.3 on the 17th 36.0 on the 28th in 2004 11



Record highest October 2009 mean daily maximum temperature
Mean daily maximum
temperature (°C)
Previous highest
Years of
record
Darwin Airport 34.8 34.4 in 2008 67
Point Fawcett AWS 33.7 33.6 in 1998 11



Record highest October 2009 daily minimum temperature
Highest daily minimum
temperature (°C)
Previous highest
Years of
record
Bradshaw AWS 29.5 on the 4th 28.1 on the 28th in 2004 10



Record lowest October 2009 temperature
Lowest temperature (°C) Previous lowest
Years of
record
Wollogorang 10.7 on the 6th 11.0 on the 19th in 1976 26
Borroloola AWS 13.3 on the 6th 13.4 on the 16th in 1996 14
Point Fawcett AWS 18.8 on the 19th = 18.8 on the 4th in 2006 11
Groote Eylandt Airport AWS 13.9 on the 7th 14.2 on the 4th in 2004 10



Record lowest October 2009 mean daily minimum temperature
Mean daily minimum
temperature (°C)
Previous lowest
Years of
record
Wollogorang 17.4 = 17.4 in 2006 26
Borroloola AWS 19.3 19.5 in 2006 14



Summaries

This table is very wide and may not fit if printed.

Summary statistics for October 2009
Maximum temperatures (°C) Minimum temperatures (°C) Rainfall (millimetres)
Mean Diff
from
average
Highest Mean Diff
from
average
Lowest Total Rank Fraction of average
Darwin-Daly (district 14GA)
Batchelor Aero AWS 37.4 +0.5 39.2 3rd 23.1 +0.1 17.8 19th 28.8 low 46%
Black Point 33.5 +0.9 36.1 19th 24.2 −0.3 21.3 7th 0.2 average 2%
Bradshaw AWS 39.1 +0.4 41.3 3rd 24.2 −0.8 17.3 19th 7.4 low 33%
Cape Don AWS 32.8   34.3 18th 25.8   24.0 8th 1.0 average 5%
Central Arnhem Plateau AWS 35.8   37.6 28th 21.0   12.9 7th 0
Darwin Airport 34.8 +1.6 38.0 18th 24.6 −0.3 22.3 19th 33.4 average 50%
Delamere Weapons Range AWS 37.7 +0.3 39.6 31st 23.2 −0.7 17.6 8th 0 lowest 0%
Douglas River 39.0 +1.5 40.5 17th 21.7 −0.7 13.5 8th 0 lowest 0%
Dum In Mirrie AWS 33.4 +0.8 38.0 18th 25.4 −0.3 21.0 19th 31.4 average 46%
Jabiru Airport AWS 38.7 +1.1 40.2 17th 23.5 −0.4 18.1 8th 0 lowest 0%
Katherine Aviation Museum 37.8 +0.1 39.5 27th 22.6 −1.2 14.3 8th 0.6 low 2%
Mango Farm 38.6 +1.2 41.0 3rd 20.4 −1.9 13.2 8th 10.2 low 25%
McCluer Island AWS 30.8 +0.3 32.8 19th 26.2 +0.2 23.8 19th 6.4 very high 81%
Middle Point AWS 38.3   40.2 17th 21.2   16.2 19th 2.6
Noonamah AWS 38.3   40.8 17th 22.4   16.7 19th 20.8
Pine Creek Council 37.2   38.9 16th 23.5   20.4 8th 24.9
Pirlangimpi AWS 34.8 +1.5 36.8 18th 23.4 +0.5 20.4 19th 82.2 average 105%
Point Fawcett AWS 33.7 +0.8 36.3 17th 22.7 −1.3 18.8 19th 55.8 average 103%
Port Keats Aero 34.8   38.6 3rd 23.4   16.6 20th 23.8
Tindal RAAF AWS 37.9 +0.4 39.4 31st 23.2 −1.1 15.2 19th 1.2 low 3%
Arnhem (district 14BC)
Alyangula Police 32.1 −0.7 34.5 16th 22.1 −1.2 18.9 6th 3.8 average 15%
Gove Airport 31.7 0.0 34.2 15th 21.4 −0.1 18.9 26th 0 lowest 0%
Groote Eylandt Airport AWS 33.8 −0.4 35.9 16th 19.1 −1.9 13.9 7th 16.8 average 63%
Maningrida Aero AWS 33.7   37.3 18th 21.8   17.1 7th 0
Milingimbi AWS 33.2   37.5 5th 22.5   18.3 7th 1.0
Ngayawili AWS 33.2 +0.8 36.5 16th 21.6 −0.9 17.4 18th 0.2 lowest 4%
Warruwi AWS 32.9 +0.5 35.6 27th 25.4 +0.1 23.7 28th 0 lowest 0%
Roper-Mcarthur (district 14DE)
Borroloola AWS 36.9 +0.3 39.6 26th 19.3 −2.4 13.3 6th 0 lowest 0%
Bulman AWS 38.0   39.5 14th 20.2   12.4 7th 0.2
Daly Waters AWS 37.6 +0.3 40.1 25th 19.4 −1.9 10.1 10th 0.4 low 2%
Larrimah 37.5 +0.1 39.0 28th 20.7 −1.6 13.0 10th 0 lowest 0%
McArthur River Mine 37.6 −0.3 40.5 26th 20.5 −0.4 14.5 10th 0 lowest 0%
Wollogorang 36.1 −0.5 38.6 26th 17.4 −2.4 10.7 6th 0 lowest 0%
Victoria (district 14F)
Kidman Springs 38.8 +0.2 41.9 15th 21.7 −2.0 12.2 19th 0 lowest 0%
Lajamanu 37.2 −0.1 40.6 31st 19.1 −1.5 11.6 10th 5.8 average 27%
Timber Creek 38.7 +0.4 40.5 14th 22.7 −1.4 12.0 11th 16.0 average 64%
Victoria River Downs 38.5 +0.7 41.3 14th 20.7 −1.7 12.2 10th 14.4 average 80%
Wave Hill 37.8 +0.1 40.8 25th 20.5 −1.1 11.3 10th 0 lowest 0%
Barkly (district 15A)
Brunette Downs 35.7 −1.0 39.4 25th 19.2 −1.5 12.7 6th 13.8 high 90%
Elliott 37.2 −0.8 41.0 13th 19.3 −1.6 11.5 10th 5.8 average 24%
Tennant Creek Airport 34.3 −0.4 38.5 31st 20.6 −1.2 16.2 10th 2.6 low 13%
Alice Springs (district 15B)
Alice Springs Airport 30.9 0.0 38.3 24th 13.1 −1.7 6.3 18th 0 lowest 0%
Curtin Springs 31.8 0.0 39.5 31st 14.2 0.0 8.0 3rd 4.5 average 26%
Jervois 32.3 −1.0 40.4 25th 14.9 −0.7 7.9 9th 0 lowest 0%
Kulgera 30.0 −0.3 38.6 24th 14.3 −0.7 6.9 18th 0.9 low 5%
Rabbit Flat 36.6 −0.8 41.2 30th 16.5 −2.3 7.6 19th 0 lowest 0%
Territory Grape Farm AWS 32.6 −0.7 38.4 25th 13.8 −1.9 8.3 9th 0.6 low 4%
Watarrka 32.0 −0.9 38.3 25th 16.6 −0.7 5.7 2nd 27.2 average 113%
Yuendumu 33.1 0.0 38.8 31st 15.3 −1.7 10.3 20th 1.2 low 7%
Yulara Aero AWS 31.8 −0.4 40.0 31st 14.3 −0.5 6.6 3rd 3.4 low 19%

Notes

This statement has been prepared based on information available at 12 pm on Monday 2 November 2009. 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 the years 1800 to 2008. They are not shown for sites with less than 10 years of record in that time, 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

NT Climate Services Centre
Bureau of Meteorology
Phone (08) 8920 3813
Email climate.nt@bom.gov.au