Tuesday, 1 December 2009 - Monthly Climate Summary for Northern Territory - Product code IDCKGC22R0
Northern Territory in November 2009: Warm with waterspouts
Days were warmer than usual for most the Territory this November, with maximum anomalies reaching 2 °C to 3 °C warmer than climatology in the southern Alice Springs District. Apart from an area adjacent to the Gulf of Carpentaria, where overnight temperatures were just below average, minimum temperatures were also warmer than the long-term mean, with temperatures as much as 1 °C to 3 °C warmer than climatology in the Alice Springs District. A significant heat-wave affected central Australia during the month, with Alice Springs recording 15 days above 35 °C.
It was a drier than usual month for much of the Territory this November, with below average rainfall recorded across large areas. However, some isolated areas in the northeast and northwest of the Top End saw average rainfall, while the very far southeast of the Territory saw well above average rainfall.
Darwin was on average for rainfall this November, with a total 131.0 mm just below the long-term mean of 139.1 mm. The mean maximum temperature recorded at Darwin Airport was 33.7 °C, which is 0.4 °C warmer than the November long-term mean of 33.3 °C. In contrast, nights were slightly cooler than usual, with a mean minimum of 25.2 °C being 0.2 °C below the long-term November mean of 25.4 °C.
Alice Springs was much drier this November, with only 0.4 mm of rain recorded. This is well below the long-term mean of 28.6 mm for the month of November. Alice Springs was much warmer than usual, with the mean maximum of 35.6 °C being 2.0 °C greater than the long-term November mean of 33.6 °C. Nights were also warmer than normal in Alice, with a mean minimum of 19.0 °C being 1.1 °C warmer than the long term mean of 17.9 °C. Alice Springs experienced a record breaking heatwave between the 7th and 21st when it had 15 consecutive days of temperatures above 35 °C. The previous record for consecutive days above 35 °C for Alice Springs in November was 13 days. Alice Springs reached 43.0 °C on the 17th, which was also a November record, this time for daily maximum temperature.
Most of the Territory (most notably western parts) experienced below average rainfall this month, except for the northwest Darwin Daly District which saw close to average rainfall. The far southeast corner, the northwest Tiwi Islands, and an area of Arnhemland were the only areas that experienced above average rainfall.
The area-averaged rainfall over the whole of the Territory was 17.2 mm which is 24.3 mm less than the long-term average of 41.5 mm.
The wettest overall was 252.0 mm at Nightcliff Pool, followed by 229.2 mm at Lambell's Lagoon and then 218.2 mm at Marrara.Some sites had their lowest total November rainfall on record.
The wettest single day 93.8 mm at Bulman AWS on the 24th, followed by 78.6 mm at Lambell's Lagoon on the 3rd and then 73.2 mm at Yulara Aero AWS on the 3rd.
Some sites had their highest November daily rainfall on record.
Most of the Territory was warmer than average this November, except for the northeast corner and a portion of the eastern Roper-McArthur and Barkly districts which were just below average. Most of the western half was 1 °C to 2 °C warmer than climatology, with some areas 2 °C to 3 °C warmer.
The area-averaged maximum temperature was 37.2 °C, which was 1.0 °C warmer than the long-term October average of 36.2 °C.
The hottest day was 44.8 °C at Walungurru AWS on the 17th, followed by 44.1 °C at Rabbit Flat on the 16th and then 44.0 °C at Walungurru AWS on the 16th and Curtin Springs on the 17th.
The warmest days on average were 40.4 °C at Victoria River Downs, followed by 40.2 °C at Lajamanu and Wave Hill, and then 40.1 °C at Elliott and 40.1 °C at Rabbit Flat.
The coolest days on average were 32.7 °C at Gove Airport, followed by 32.8 °C at Dum In Mirrie AWS and then 32.9 °C at Alyangula Police and Point Fawcett AWS.
The coldest day was 21.0 °C at Tennant Creek Airport on the 23rd, followed by 22.4 °C at Kulgera on the 24th and then 23.5 °C at Jervois on the 23rd.
Some sites had their highest November temperature on record. Some sites had their coldest November day (lowest maximum temperature) on record. Some sites had their highest November mean daily maximum temperature on record.
Minimums in the southern and eastern Alice Springs District were 1 °C to 2 °C warmer than climatology this November, as were a few isolated areas through central parts of the Territory. In contrast, parts of the Roper-McArthur and eastern Arnhem districts were cooler than usual, with anomalies reaching 1 °C to 2 °C below average in the Roper-McArthur District.
The area-averaged minimum temperature was 23.1 °C, which was 0.5 °C greater than the long-term average of 22. 6°C.
The coldest night was 8.4 °C at Arltunga on the 25th, followed by 9.5 °C at Jervois on the 25th, and then 9.8 °C at Alice Springs Airport and Territory Grape Farm on the 25th.
The coolest nights on average were 19.0 °C at Alice Springs Airport, followed by 19.1 °C at Curtin Springs, and then 19.6 °C at Kulgera and Yuendumu.
The warmest nights on average were 26.9 °C at Cape Don AWS, followed by 26.6 °C at Warruwi AWS, followed by 26.5 °C at Bradshaw AWS.
The warmest night was 31.8 °C at Lajamanu AWS on the 22nd, followed by 30.5 °C at Rabbit Flat on the 18th and then 30.3 °C at Alice Springs Airport on the 18th.
Some sites had their lowest November temperature on record. Some sites had their warmest November night (highest daily minimum temperature) on record. Some sites had their highest November mean daily minimum temperature on record. Some sites had their lowest November mean daily minimum temperature on record.
The strongest wind gust was 120 km/h at Borroloola AWS on the 13th, followed by 109 km/h at Borroloola AWS on the 1st and then 96 km/h at Yulara Aero AWS on the 2nd.
Several severe thunderstorms were reported across the Territory in November. Some of interest are described below.
Severe thunderstorms at Borroloola
On the 1st, a squall line moved through Borroloola in the afternoon, with a 59 kt (109 km/h) wind gust recorded at Borroloola, and 43 kt (80 km/h) at McArthur River.
On the 13th, another squall line moved through Borroloola, with a 65 kt (120 km/h) wind gust recorded that afternoon.
Severe thunderstorm at Yulara with record rainfall
On the 2nd, a slow moving line of thunderstorms saw 46.3 mm of rain fall at Yulara Aero AWS in 60 minutes (a total of 73.2 mm fell to 9 am. on the 3rd at Yulara Aero AWS, which broke the highest November daily rainfall record at Yulara). A 49 kt (91 km/h) wind gust was also recorded at Yulara that day.
Severe thunderstorms in the Darwin Rural area
There were several days in November where potentially severe thunderstorms were observed in the Darwin rural area. On the 3rd, a storm caused damage to Bees Creek Primary School which lost a shade structure, and where large trees were felled on cars and power lines.
Darwin Harbour waterspouts
A spectacular waterspout and three funnel clouds were observed over Darwin Harbour on the 19th between 8:00 and 8:30 am., which formed beneath some rapidly developing cumulus clouds.
|Extremes in November 2009|
44.8 °C at Walungurru AWS on the 17th|
|Warmest days on average||
40.4 °C at Victoria River Downs|
|Coolest days on average||
32.7 °C at Gove Airport|
21.0 °C at Tennant Creek Airport on the 23rd|
8.4 °C at Arltunga on the 25th|
|Coolest nights on average||
19.0 °C at Alice Springs Airport|
|Warmest nights on average||
26.9 °C at Cape Don AWS|
31.8 °C at Lajamanu AWS on the 22nd|
252.0 mm at Nightcliff Pool|
93.8 mm at Bulman AWS on the 24th|
|Highest wind gust||
120 km/h at Borroloola AWS on the 13th|
|Record highest November daily rainfall|
|Highest daily rainfall (mm)||Previous highest||Years of
|Yulara Aero AWS||73.2||on the 3rd||37.4||on the 17th in 2003||18|
|Record lowest total November rainfall|
|Total rainfall (mm)||Previous lowest||Years of
|Mataranka Homestead Resort||2.0||3.4||in 2006||66|
|Cdu Katherine Rural Campus||3.0||9.9||in 1969||44|
|Howard Springs||19.0||34.2||in 1979||41|
|Douglas River||19.2||30.4||in 2003||34|
|Jabiru Airport AWS||31.2||49.4||in 1980||32|
|Timber Creek||7.4||13.0||in 1993||27|
|Tindal RAAF AWS||12.4||12.8||in 2000||23|
|Mary River Rangers||8.4||40.0||in 1994||18|
|Channel Point||32.7||34.8||in 2000||16|
|McCluer Island AWS||0.0||= 0.0||in 2006||15|
|Wildman Rangers||40.6||65.8||in 2000||11|
|Upper Fergusson River||10.8||19.8||in 2006||11|
|Groote Eylandt Airport AWS||39.4||60.6||in 2008||10|
|Record highest November temperature|
|Highest temperature (°C)||Previous highest||Years of
|Alice Springs Airport||43.0||on the 17th||42.9||on the 28th in 1996||68|
|Pirlangimpi AWS||36.2||on the 2nd||= 36.2||on the 9th in 2008||25|
|Record lowest November daily maximum temperature|
Lowest daily maximum
|Previous lowest||Years of
|McArthur River Mine||28.3||on the 24th||29.2||on the 17th in 1982||28|
|Borroloola AWS||27.4||on the 24th||28.7||on the 11th in 1998||13|
|Ngukurr||30.3||on the 24th||32.8||on the 23rd in 1964||13|
|Point Fawcett AWS||29.2||on the 24th||29.6||on the 5th in 2006||11|
|Record highest November mean daily maximum temperature|
Mean daily maximum
|Previous highest||Years of
|Jabiru Airport AWS||38.8||38.6||in 2004||30|
|Mango Farm||38.1||37.7||in 2006||28|
|Douglas River||38.9||38.3||in 2003||17|
|Record highest November daily minimum temperature|
|Highest daily minimum (°C)||Previous highest||Years of
|Lajamanu AWS||31.8||on the 22nd||30.0||on the 13th in 2002||16|
|Bradshaw AWS||29.3||on the 30th||29.0||on the 23rd in 2008||11|
|Record lowest November temperature|
|Lowest temperature (°C)||
|Dum In Mirrie AWS||21.6||on the 4th||22.0||on the 15th in 2005||11|
|Point Fawcett AWS||21.8||on the 6th||22.0||on the 26th in 2000||11|
|Record highest November mean daily minimum temperature|
Mean daily minimum
|Previous highest||Years of
|Tindal RAAF AWS||26.2||26.1||in 2008||20|
|Bradshaw AWS||26.5||= 26.5||in 2008||11|
|Record lowest November mean daily minimum temperature|
Mean daily minimum
|Previous lowest||Years of
|Point Fawcett AWS||24.9||= 24.9||in 2006||11|
|Summary statistics for November 2009|
|Maximum temperatures (°C)||Minimum temperatures (°C)||Rainfall (mm)|
|Darwin-Daly (district 14GA)|
|Batchelor Aero AWS||36.5||+1.0||39.1||6th||24.0||0.0||21.2||10th||70.8||136.0||low||52%|
|Cape Don AWS||33.2||34.7||14th||26.9||23.0||25th||21.0||100.3||low||21%|
|Central Arnhem Plateau AWS||36.4||39.4||15th||23.4||21.2||25th||13.2|
|Delamere Weapons Range AWS||39.0||+1.4||41.6||15th||25.8||+0.9||21.0||24th||22.8||68.7||v low||33%|
|Dum In Mirrie AWS||32.8||-0.2||33.8||19th||25.7||-0.4||21.6||4th||178.0||127.4||high||140%|
|Jabiru Airport AWS||38.8||+2.0||41.2||18th||25.1||+0.2||22.4||9th||31.2||146.9||lowest||21%|
|Katherine Aviation Museum||38.9||+1.4||41.0||15th||25.4||+0.7||20.0||24th||21.2||86.5||v low||25%|
|Middle Point AWS||37.2||39.0||6th||23.3||21.8||7th||130.0|
|Pine Creek Council||37.7||39.7||18th||24.7||21.2||24th||27.9|
|Point Fawcett AWS||32.9||-0.2||34.4||7th||24.9||-0.5||21.8||6th||134.8||125.1||average||108%|
|Port Keats Aero AWS||34.5||+0.1||35.9||19th||26.0||+0.5||23.0||11th||51.0||81.4||average||63%|
|Tindal RAAF AWS||39.1||+1.8||41.1||15th||26.2||+1.1||20.2||24th||12.4||99.2||lowest||13%|
|Arnhem (district 14BC)|
|Groote Eylandt Airport AWS||34.5||0.0||36.9||19th||22.6||-1.0||20.1||5th||39.4||114.3||lowest||34%|
|Maningrida Aero AWS||33.6||34.8||13th||24.3||22.6||5th||29.2|
|Roper-Mcarthur (district 14DE)|
|McArthur River Mine||38.9||+0.2||41.6||28th||23.8||-0.3||19.4||24th||36.6||50.2||average||73%|
|Victoria (district 14F)|
|Victoria River Downs||40.4||+1.9||42.3||19th||25.1||+0.5||19.6||26th||41.4||59.0||average||70%|
|Wave Hill||40.2||+1.5||42.7||28th||24.8||+1.0||15.2||25th||11.8||58.4||v low||20%|
|Barkly (district 15A)|
|Tennant Creek Airport||37.4||+0.9||41.8||18th||24.8||+1.0||16.1||24th||13.0||38.0||low||34%|
|Alice Springs (district 15B)|
|Alice Springs Airport||35.6||+2.0||43.0||17th||19.0||+1.1||9.8||25th||0.4||28.6||v low||1%|
|Territory Grape Farm AWS||36.9||+1.4||41.6||17th||19.9||+1.3||9.8||25th||1.2||34.5||v low||3%|
|Yulara Aero AWS||35.8||+0.8||43.1||17th||20.0||+1.8||12.3||25th||81.2||32.9||v high||247%|
A Monthly Climate Summary is prepared to list the main features of the weather in Northern Territory 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 11 am on Tuesday 1 December 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
(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.