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Tuesday, 30 September 2008 - Monthly Climate Summary for Northern Territory - Product code IDCKGC12R0

Warm throughout and wet in the South  - Northern Territory in September 2008

Summary

Darwin saw the end of it’s longest recorded dry spell and a savage thunderstorm ripped through Alice Springs. 102 km/h winds were recorded at Alice Springs Airport on the afternoon of Monday 22 September, with stronger winds probably experienced in town. Despite the storm, long-running severe rainfall deficiencies persist in the region. Maximum and mininum temperatures were above average over most parts. Rainfall was above averge in central parts and below average elsewhere.

Rainfall

Central parts of the Territory, including areas about the Tanami and northern Alice Springs district, saw above average rainfall, though this was sporadic in nature. In the far south, below average rainfall perpetuated long-running rainfall deficiencies. The Alice Springs Airport recording site has now recorded a cummulative total of just 99.4 mm from May 2007. This is it’s lowest 16-month (June-September) rainfall on record. At the other end of the Territory, Darwin recorded its longest running dry spell on record, going 167 days between 10 April and 23 September without recoding any rainfall in the gauge. The previous record was 164 days, between 7 May and 17 October, 1976.

Maximum temperature

Maximum temperatures were mostly above average. Some areas in the Alice Springs and McArthur districts recorded two to three degrees above average maximums.

Some sites had their highest September temperature on record.

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

Minimum temperature

Minimum temperatures remained mostly with in one degree of the long term mean over the Top End and increasing two to three degrees above normal in the south.

Some sites had their lowest September temperature on record.

Some sites had their warmest September night (highest daily minimum temperature) on record.

Some sites had their highest September mean daily minimum temperature on record.

Further information

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

Extremes

Hottest day
Highest temperature
40.8°C at Elliott on the 15th
Warmest days on average
Highest mean daily maximum temperature
37.7°C at Bradshaw AWS
Coolest days on average
Lowest mean daily maximum temperature
27.5°C at Kulgera
Coldest day
Lowest daily maximum temperature
16.7°C at Arltunga on the 23rd
Coldest night
Lowest temperature
−1.0°C at Kulgera on the 1st
Coolest nights on average
Lowest mean daily minimum temperature
11.6°C at Yulara Aero AWS
Warmest nights on average
Highest mean daily minimum temperature
24.2°C at Cape Don AWS
Warmest night
Highest daily minimum temperature
28.2°C at Kidman Springs on the 20th
Wettest overall
Highest total rainfall
62.4 mm at Upper Waterhouse River
Wettest day
Highest daily rainfall
61.8 mm at Upper Waterhouse River on the 12th

Records

Record highest total September rainfall
Total rainfall (mm) Previous highest Years of
record
Wycliffe Well 13.0 11.7 in 1998 21
Rabbit Flat 41.4 22.2 in 1998 11



Record highest September temperature
Highest temperature (°C) Previous highest Years of
record
Black Point 34.4 on the 25th 34.3 on the 30th in 2002 16



Record highest September mean daily maximum temperature
Mean daily maximum
temperature (°C)
Previous highest Years of
record
Pirlangimpi AWS 33.9 33.7 in 1998 23



Record highest September daily minimum temperature
Highest daily minimum
temperature (°C)
Previous highest Years of
record
Kidman Springs 28.2 on the 20th 28.0 on the 27th in 2003 12
Delamere Weapons Range AWS 26.0 on the 20th = 26.0 on the 13th in 2005 11



Record lowest September temperature
Lowest temperature (°C) Previous lowest Years of
record
Kulgera −1.0 on the 1st = −1.0 on the 13th in 2004 26



Record highest September mean daily minimum temperature
Mean daily minimum
temperature (°C)
Previous highest Years of
record
Territory Grape Farm 14.4 13.9 in 1997 15



Summaries

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

Summary statistics for September 2008
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
September
2008
Diff
from
normal
Highest for
September
2008
Mean for
September
2008
Diff
from
normal
Lowest for
September
2008
Total for
September
2008
Rank of
September
2008
Fraction of
September
normal
Darwin-Daly (district 14GA)
Batchelor Aero AWS 36.7 +0.7 38.4 17th 21.2 +0.8 17.5 10th 7.8 high 211%
Black Point 32.3 +0.9 34.4 25th 22.9 0.0 20.7 12th 1.0 very high 111%
Bradshaw AWS 37.7   39.5 29th 23.1 +1.5 16.0 26th 0.4
Cape Don AWS 30.8   33.0 10th 24.2   23.2 5th 13.0 very high 765%
Channel Point 30.8 −0.1 33.7 25th 21.7 +0.3 17.9 26th 0 lowest 0%
Darwin Airport 33.3 +0.8 37.0 10th 23.2 +0.2 21.0 10th 5.2 average 34%
Delamere Weapons Range AWS 35.7 +0.1 37.8 14th 21.7 +1.1 16.6 10th 14.2 very high 458%
Douglas River 37.5 +1.0 39.9 18th 20.2 +1.7 15.4 11th 16.6 very high 395%
Dum In Mirrie AWS 31.6   35.9 10th 23.6 +0.7 20.6 10th 4.2 average 43%
Jabiru Airport 37.3 +1.3 39.6 18th 21.8 +0.3 18.2 11th 0 lowest 0%
Katherine Aviation Museum 36.2 +0.4 38.4 16th 20.4 +0.4 13.9 11th 1.0 average 15%
Mango Farm 36.9 +0.7 39.1 18th 19.7 +0.4 14.4 26th 20.6 very high 275%
McCluer Island 29.3   31.6 8th 24.6 0.0 22.7 12th 0 lowest 0%
Middle Point AWS 37.0   39.4 19th 19.4   15.3 10th 11.0
Oenpelli 36.6 +0.7 38.3 17th 19.8 −0.3 15.7 11th 0 lowest 0%
Pine Creek Council 36.0   37.8 17th 21.8   17.8 11th 21.6
Pirlangimpi AWS 33.9 +1.0 36.4 9th 21.8 +0.7 20.2 11th 13.8 average 48%
Point Fawcett AWS 32.1 +0.3 34.7 10th 20.4 −1.1 17.5 11th 1.4 average 21%
Port Keats Aero AWS 33.9   37.3 10th 21.5 +0.7 15.8 26th 0
Tindal RAAF AWS 36.7 +1.1 38.9 16th 20.5 +0.5 13.9 11th 0 lowest 0%
Arnhem (district 14BC)
Alyangula Police 30.6 −0.5 32.5 10th 21.2 +1.0 18.5 3rd 11.1 very high 317%
Gove Airport 30.5 +0.3 31.5 8th 20.1 +0.5 17.8 29th 1.0 high 27%
Groote Eylandt Airport AWS 32.9   35.6 28th 18.4 +1.0 14.9 11th 0
Maningrida Aero AWS 32.7   36.8 9th 20.9   17.8 10th 0
Milingimbi AWS 32.2   36.3 10th 21.4   18.0 11th 0
Ngayawili AWS 32.1   34.3 9th 20.8   18.4 5th 0.2
Warruwi AWS 31.5 +0.7 33.8 8th 23.9 +0.4 22.1 12th 0.4 high 44%
Roper-Mcarthur (district 14DE)
Borroloola 35.2 +0.4 38.1 17th 18.0 +0.5 13.2 10th 0 lowest 0%
Bulman AWS 36.6   39.1 17th 17.6   11.7 10th 0
Centre Island 30.8 +0.3 34.0 29th 22.7 +0.6 20.9 11th 0.6 average 40%
Daly Waters AWS 36.5 +2.0 38.9 18th 17.7 +0.7 11.4 10th 0 lowest 0%
Larrimah 36.1 +1.1 38.5 19th 19.0 +0.6 12.8 10th 0.4 average 11%
McArthur River Mine 36.5 +1.4 40.1 18th 19.4 +2.5 14.1 10th 0 lowest 0%
Wollogorang 35.2 +0.9 38.4 29th 18.0 +2.2 13.2 11th 0 lowest 0%
Victoria (district 14F)
Kidman Springs 36.8 +0.1 39.5 14th 20.6 +1.0 11.0 26th 1.4 average 37%
Timber Creek 37.1 +0.8 39.7 15th 21.1 +0.5 14.2 11th 2.5 average 38%
Victoria River Downs 37.0 +1.6 39.3 17th     12.6 26th 0 lowest 0%
Wave Hill 36.1 +1.0 39.5 29th 19.3 +1.5 11.4 25th 2.4 average 25%
Barkly (district 15A)
Elliott 36.3 +1.1 40.8 15th 18.5 +1.1 11.0 25th 0.5 average 8%
Tennant Creek Airport 31.9 +0.3 37.8 13th 19.3 +0.9 11.4 24th 34.2 very high 462%
Alice Springs (district 15B)
Ali Curung 31.6 −0.7 37.2 20th     9.7 24th 33.8 very high 469%
Alice Springs Airport 29.4 +2.2 36.6 18th 12.9 +2.7 3.4 24th 3.2 average 39%
Curtin Springs 28.7 +1.0 35.7 27th 11.9 +2.0 7.2 4th 0 lowest 0%
Jervois 30.1 +0.3 38.0 20th 14.2 +3.1 7.2 24th 7.6 high 131%
Kulgera 27.5 +0.5 35.9 27th 12.3 +1.1 −1.0 1st 0 lowest 0%
Rabbit Flat 33.9 −0.7 38.6 19th 15.7 +1.3 5.8 25th 41.4 highest 1335%
Territory Grape Farm 30.5 0.0 37.0 20th 14.4 +2.4 7.8 6th 18.0 high 234%
Watarrka 29.4 −0.2 36.1 21st 12.8 −0.5 6.8 23rd 0.5 low 7%
Yuendumu 30.4 +0.9 37.2 20th 13.4 +0.4 5.7 23rd 47.5 very high 601%
Yulara Aero AWS 28.6 −0.3 36.0 21st 11.6 +0.8 6.1 23rd 3.0 average 48%

Notes

This statement has been prepared based on information available at 11 am on Tuesday 30 September 2008. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals are long-term means based on observations from the years 1800 to 2007. 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 ("normal") 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, normal in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of normal 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