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

Active monsoon in the centre - Northern Territory in January 2009

Summary

The monsoon trough remained over the central parts of the Territory during most of the month. Two persistent low pressure systems, one off the west coast of Australia and the other over the Golf of Carpentaria, kept the monsoon trough over the Territory.  The convection associated with the monsoon trough brought good rainfall in the Victoria River, Roper McArthur and the Barkly districts. Several locations reported record rainfalls.

Rainfall

The Top End and most of the Alice Springs district recorded about average rainfall for the month.  Some areas in the far southwest, the Alice Springs district, recorded below average rainfall.

The wettest overall was 634.8 mm at Wollogorang, followed by 632.0 mm at Bradshaw AWS, followed by 627.7 mm at CDU Katherine Rural Campus.

Some sites had their highest total January rainfall on record.

The wettest single day was 171.4 mm at CDU Katherine Rural Campus on the 26th, followed by 159.0 mm at Ngayawili AWS on the 8th, followed by 156.8 mm at Daly Waters AWS on the 30th.

Some sites had their highest January daily rainfall on record.

Maximum temperature

The rain and cloud in the central Northern Territory contributed to the average to below average temperatures in the Alice Springs district. Most of the Territory saw cooler days than average, except for the far southwestern Alice Springs district and some coastal areas in the Top End where the temperatures were above average.

The hottest day was 44.0°C at Curtin Springs on the 23rd, followed by 43.7°C at Rabbit Flat on the 12th, followed by 43.0°C at Rabbit Flat on the 7th and Kulgera on the 23rd.

The warmest days on average were 39.2°C at Curtin Springs, followed by 39.1°C at Yulara Aero AWS, followed by 37.8°C at Rabbit Flat.

The coolest days on average were 30.8°C at Ngayawili AWS, followed by 31.1°C at Gove Airport, followed by 31.2°C at Central Arnhem Plateau AWS.

The coldest day was 22.0°C at Yuendumu on the 18th, followed by 23.8°C at Tennant Creek Airport on the 17th, followed by 24.2°C at Papunya on the 18th.

Some sites had their coldest January day (lowest maximum temperature) on record.

Some sites had their lowest January mean daily maximum temperature on record.

Minimum temperature

Night-time temperatures were near-to-below average over most of the Territory. Exceptions to this were the southern Alice Springs district and northwestern Top End, where they were one to two degrees above average.

The coldest night was 15.3°C at Kulgera on the 3rd, followed by 15.4°C at Yuendumu on the 19th, followed by 16.5°C at Kulgera on the 5th.

The coolest nights on average were 22.3°C at Kulgera and Yuendumu, followed by 22.4°C at Alice Springs Airport, followed by 22.8°C at Territory Grape Farm AWS.

The warmest nights on average were 26.6°C at Black Point, followed 26.4°C at Point Fawcett AWS.

The warmest night was 31.5°C at Yulara Aero AWS on the 25th, followed by 31.0°C at Victoria River Downs on the 9th, followed by 30.4°C at Curtin Springs on the 23rd.

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

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

Some sites had their lowest January 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
44.0°C at Curtin Springs on the 23rd
Warmest days on average
Highest mean daily maximum temperature
39.2°C at Curtin Springs
Coolest days on average
Lowest mean daily maximum temperature
30.8°C at Ngayawili AWS
Coldest day
Lowest daily maximum temperature
22.0°C at Yuendumu on the 18th
Coldest night
Lowest temperature
15.3°C at Kulgera on the 3rd
Coolest nights on average
Lowest mean daily minimum temperature
22.3°C at Kulgera
22.3°C at Yuendumu
Warmest nights on average
Highest mean daily minimum temperature
26.6°C at Black Point
Warmest night
Highest daily minimum temperature
31.5°C at Yulara Aero AWS on the 25th
Wettest overall
Highest total rainfall
634.8 mm at Wollogorang
Wettest day
Highest daily rainfall
171.4 mm at CDU Katherine Rural Campus on the 26th
Highest wind gust
93 km/h at Alice Springs Airport on the 25th

Records

Record highest January daily rainfall
Highest daily rainfall
in January 2009 (mm)
Previous highest
for January
Years of
record
Benmara 143.0 on the 2nd 121.0 on the 14th in 1979 39
Daly Waters AWS 156.8 on the 30th 83.8 on the 26th in 1944 30
Hidden Valley 105.0 on the 3rd 87.0 on the 14th in 2004 30
Gorrie 135.2 on the 2nd 128.0 on the 22nd in 1987 16



Record highest total January rainfall
Total rainfall
(mm)
Previous highest Years of
record
Average
Daly Waters AWS 576.0 393.8 in 1940 31 149.7
Kidman Springs 443.4 322.5 in 1984 37 162.9
Gilnockie 495.4 447.0 in 2006 18 172.6



Record lowest January daily maximum temperature
Lowest daily maximum
temperature (°C)
Previous lowest Years of
record
Average
Tennant Creek Airport 23.8 on the 17th 24.2 on the 19th in 2006 39 36.7



Record lowest January mean daily maximum temperature
Mean daily maximum
temperature (°C)
Previous lowest Years of
record
Average
Brunette Downs 31.5 31.7 in 1974 41 37.1
Alyangula Police 31.7 31.8 in 2003 24 33.1
Wollogorang 31.4 31.9 in 2003 23 35.0



Record highest January daily minimum temperature
Highest daily minimum
temperature (°C)
Previous highest Years of
record
Average
Yulara Aero AWS 31.5 on the 25th 30.6 on the 4th in 2007 21 22.4



Record lowest January mean daily minimum temperature
Mean daily minimum
temperature (°C)
Previous lowest Years of
record
Average
Timber Creek 24.2 = 24.2 in 2006 27 25.0
Kidman Springs 24.2 24.3 in 2001 12 24.9




Summaries

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

Summary statistics for January 2009
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean Diff
from
average
Highest Mean Diff
from
average
Lowest Total Rank Fraction of
January
average
Darwin-Daly (district 14GA)
Batchelor Aero AWS 32.3 −0.5 34.7 12th 24.2 +0.3 22.2 15th 224.4 low 78%
Black Point 31.8 +0.4 34.2 15th 26.6 +0.9 23.7 11th 105.5 very low 35%
Bradshaw AWS 33.4   37.1 13th 24.4   21.7 12th 632.0
Cape Don AWS 31.4   32.3 15th 26.2   23.7 11th 159.2 average 74%
Central Arnhem Plateau AWS 31.2   34.1 13th 23.4   21.2 14th 305.0
Channel Point 31.6 −0.1 33.0 13th 25.6 +0.7 22.4 31st 321.4 average 78%
Darwin Airport 32.1 +0.3 33.9 12th 25.5 +0.7 22.9 23rd 423.4 average 100%
Delamere Weapons Range AWS 32.5   35.7 12th 23.5   21.6 30th 60.8
Douglas River 32.9 −0.7 35.6 12th 23.9 +0.3 21.4 11th 345.8 high 126%
Dum In Mirrie AWS 31.5   32.8 13th 26.2   23.6 23rd 292.2 average 89%
Jabiru Airport AWS 33.5 0.0 35.9 12th 25.0 +0.5 22.5 14th 175.4 lowest 48%
Katherine Aviation Museum 33.6 −1.1 36.1 13th 23.8 −0.4 22.0 11th 435.6 very high 160%
Mango Farm 32.8 −0.8 35.5 12th 23.7 −0.1 21.6 12th 359.9 average 108%
McCluer Island AWS 31.3   32.7 27th 26.4   23.9 10th 129.6 average 55%
Noonamah AWS 32.8   35.3 12th 24.7   22.3 15th 386.8
Pine Creek Council 32.7   35.3 12th 24.0   20.9 14th 554.9
Pirlangimpi AWS 32.0 +0.2 33.7 12th 25.4 +0.9 22.8 6th 198.6 very low 49%
Point Fawcett AWS 31.3   32.6 21st 26.4   23.6 16th 214.2 low 63%
Port Keats Aero 31.9   34.9 15th 25.4   21.6 15th 226.4
Tindal RAAF AWS 33.2 −0.8 35.7 7th 24.1 −0.1 21.9 11th 460.8 very high 171%
Arnhem (district 14BC)
Alyangula Police 31.7 −1.4 32.9 4th 25.9 +0.1 22.9 28th 347.8 high 159%
Gove Airport 31.1 −0.9 33.7 29th 24.5 −0.1 21.9 14th 448.4 very high 156%
Groote Eylandt Airport AWS 32.7   34.4 19th 25.3   22.8 28th 290.2
Maningrida Aero AWS 31.9   35.3 13th 25.1   22.8 14th 259.4
Ngayawili AWS 30.8   32.5 26th 25.4   22.0 14th 547.8
Warruwi AWS 32.1 +0.1 34.3 13th 25.9 +0.3 23.4 14th 183.6 low 69%
Roper-Mcarthur (district 14DE)
Borroloola AWS 32.2 −1.7 35.7 12th 24.2 −0.6 22.3 28th 51.4 low 25%
Centre Island AWS 32.2 −1.3 35.8 13th 25.5 −1.2 22.6 8th 281.4 high 128%
Daly Waters AWS 33.5 −2.3 36.7 13th 23.6 −0.4 21.5 7th 576.0 highest 385%
Larrimah 33.3 −2.0 36.2 8th 23.5 −0.5 21.9 6th 476.4 very high 227%
McArthur River Mine 33.0 −3.0 37.0 12th 24.7 −0.1 22.7 7th 489.4 very high 246%
Ngukurr 34.1 −1.5 36.9 14th 24.6 −0.2 22.6 15th 246.3 high 138%
Wollogorang 31.4 −3.6 34.8 23rd 23.7 −0.5 20.1 20th 634.8 very high 302%
Victoria (district 14F)
Kidman Springs 34.6 −1.2 38.0 11th 24.2 −0.7 21.5 30th 443.4 highest 272%
Lajamanu AWS 36.6 −0.3 41.9 7th 23.8 −0.1 19.5 25th 201.4 high 137%
Timber Creek 34.5 −1.4 38.0 12th 24.2 −0.8 21.7 15th 322.3 high 137%
Victoria River Downs 34.1 −2.5 38.2 11th 24.7 −0.2 21.1 14th 409.4 very high 273%
Wave Hill 34.3 −2.8 38.4 11th 23.6 −0.6 21.0 5th 377.6 very high 262%
Barkly (district 15A)
Brunette Downs 31.5 −5.6 35.5 7th 23.4 −1.1 21.0 30th 336.1 very high 321%
Elliott 34.7 −2.9 39.4 7th 23.7 −0.4 21.2 14th 286.0 very high 212%
Tennant Creek Airport 33.3 −3.4 39.0 12th 23.4 −1.6 20.9 18th 341.8 very high 321%
Alice Springs (district 15B)
Alice Springs Airport 36.1 −0.3 40.2 23rd 22.4 +1.0 17.4 12th 14.4 average 39%
Arltunga 35.9   40.3 24th     19.8 15th 31.0 average 81%
Curtin Springs 39.2 +1.5 44.0 23rd 24.0 +2.0 19.0 3rd 0 lowest 0%
Jervois 36.3 −2.2 42.7 24th 23.6 +1.2 21.1 31st 38.2 average 84%
Kulgera 37.5 +0.8 43.0 23rd 22.3 +0.4 15.3 3rd 0 lowest 0%
Papunya 37.2   41.6 12th 23.2   18.0 19th 25.5 average 59%
Rabbit Flat 37.8 −0.6 43.7 12th 24.2 −0.1 20.8 18th 139.4 high 128%
Territory Grape Farm AWS 35.8 −1.9 39.5 12th 22.8 +1.3 17.5 19th 62.8 high 146%
Watarrka 37.6 −0.9 41.7 27th 23.5 −0.1 18.2 8th 11.8 average 36%
Yuendumu 36.1 −0.3 39.5 11th 22.3 0.0 15.4 19th 102.2 high 162%
Yulara Aero AWS 39.1 +0.6 42.9 24th 23.8 +1.4 19.1 4th 0 lowest 0%

Notes

This statement has been prepared based on information available at 1 pm on Monday 2 February 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 2006. 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