Monday, 2 December 2013 - Monthly Climate Summary for Northern Territory - Product code IDCKGC12R0
Northern Territory in November 2013: Early monsoon onset
- 24 new November daily rainfall records
- Darwin Airport sees wettest November Day on record (104.8 mm on 5 Nov)
- 31 new November total rainfall records (of sites with over 10 years of record)
- Middle Point sees hottest November day on record with 40.5 °C in the 1st
- 5 sites see coolest November day on record
- Temperatures (NT Average):
- Mean is 0.41 °C above average and lowest since 2011
- Maximum (daytime) is 0.34 above average and the lowest since 2011
- Minimum (overnight) is 0.47 above average and the lowest since 2011
- Record setting rainfall event over Top End on the 5th and 24-28 November
- Hottest day was 43.2 °C at Rabbit Flat on the 8th
- Coldest night was 8.1 °C at Arltunga on the 2nd
- Wettest day was 183.8 mm at Gunn Point on the 24th
Tropical cyclone Alessia
On 20 November a tropical low pressure system formed within a tropical trough over the eastern Indian Ocean south of Java. The low moved east and intensified reaching tropical cyclone strength on the 22nd off the northwest shelf and was named tropical cyclone Alessia. The storm skirted the Kimberley coastline and then made landfall on the western Top End near the mouth of the Daly River at around 18:30 local time on the 24th. After making Alessia weakened to a tropical low and moved across the Top End producing large rainfall across the region. Ex-tropical cyclone Alessia moved into the Gulf of Carpentaria on the 26th. The warm waters of the Gulf provided fuel for Alessia to intensify again to a tropical cyclone near Centre Island on the 27th. Tropical Cyclone Alessia made landfall again about 70 km west of the NT/QLD border, and remained in the region as a tropical low until the end of the month.
Early Monsoon onset
A monsoon trough moved over the continent from around the 19th through the end of the month. Many locations experienced monsoonal conditions including thick cloud cover and heavy rainfall during this period. Darwin Airport experienced heavy rainfall and sustained westerlies on the 23rd and 24th, coinciding with the monsoon onset there. Rainfall continued through the end of the month over the Roper McArthur and Barkly Districts associated with ex-tropical cyclone Alessia.
Top End thunderstorms set new Daily rainfall records
On the 4th and 5th of November an outbreak of thunderstorms over the western Top End set a number of new November daily rainfall records. Darwin Airport received 104.8 mm in the 24 hours to 9am on the 5th. Palmerston set a new November record with 78.2 mm. The highest falls on the day was 156.8 mm at Darwin Botanic Gardens, also a new record for this site. Stokes Hill Wharf saw 116.6 and Knucky Lagoon had 122.0 mm, although not new records for these sites.
More daily rainfall records were set later in the month when monsoon activity picked up over the Top End including the passage of ex-tropical cyclone Alessia. The wettest single day was at Gunn Point with 183.8 mm on the 24th, followed by Centre Island with 162.8 mm on the 27th, and Stokes Hill with 160.2 mm on the 24th.
Monthly rainfall totals
With thunderstorms across the western Top End early in the month, and early season monsoon activity toward the end of the month, November rainfall totals were very much above average to highest on record for most of the northern NT. By contrast, the southern NT saw a very dry November with no rainfall until the last few days of the month. When averaged across the Territory the mean rainfall equaled 62.3 mm. This is 20.5 mm above the November average and the wettest November since 2011.
At least 31 sites had their highest total November rainfall on record. Darwin Airport, with 317.2 mm, had their second wettest November on record and wettest November in 49 years. In Darwin's northern suburbs Nightcliff (268.6 mm) and Karama (214.6 mm) both had their second wettest November on record. With a November total of 142 mm, Victoria River Downs had their wettest November in at least 31 years, although there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.
The wettest overall in the NT this month was Stokes Hill with 556.8 mm, followed by Darwin Botanic Gardens with 515.6 mm, and then by Darwin Bowls Club with 504.5 mm.
The southeast Alice Springs District was a stark contrast to the rainfall in the north. The driest overall were Alice Plaza, Colyer Creek, Elliott, and Mount Lloyd that ended the month without any measurable rainfall.
When averaged across the Territory, this month, the mean temperature was 29.8 °C, which was 0.4 °C above the long term average for November. With a monthly mean temperature of 28.9 °C, Milingimbi was the only location to set a new mean November temperature record this month, 0.2 °C below the previous low record set in 2003.
The warmest on average was Bradshaw with 31.9 °C, followed by Victoria River Downs with 31.7 °C, and then Katherine Country Club, Ngukurr and Timber Creek all with a monthly mean temperature of 31.5 °C.
The coolest on average was Kulgera with 26.2 °C, followed by Arltunga with 26.5 °C, and then Alice Springs Airport and Curtin Springs both with 26.7 °C.
Due to thick cloud cover in the north for the last part of November, many Top End locations experienced a few very cool days. But when averaged over the whole month the warm conditions early in the month, along with the warm and dry conditions in the south counteracted the affect of the cool period and the NT mean daily maximum temperature for November was 36.5 °C, 0.3 °C above the long term mean for the month. Middle Point was the only site to have their highest November temperature on record this month. However several sites had their coldest November day (lowest maximum temperature) on record in association with monsoonal weather near the end of the month. The cooler days at the end of the month were cool enough that Dum-In-Mirrie, Ngayawili and Milingimbi all had their record lowest November mean daily maximum temperature.
The hottest day was at Rabbit Flat with 43.2 °C on the 8th, followed by Walungurru with 43.1 °C on the 7th, followed by Rabbit Flat again with 43.0 °C also on the 7th and Wave Hill also with 43.0 °C on the 17th.
The warmest days on average were at Victoria River Downs with 38.8 °C, followed by Timber Creek with 38.7 °C, and then Lajamanu with 38.5 °C.
The coolest days on average were at McCluer Island with 31.9 °C, followed by Darwin Harbour with 32.2 °C, and then Ngayawili with 32.4 °C.
The coldest day was at Kulgera with 25.1 °C on the 21st, followed by Wollogorang with 25.4 °C on the 27th, followed by Kulgera again with 26.7 °C and on the 11th.
Minimum temperatures followed a similar pattern to maximum temperatures across the Territory this month, with end of the month means being close to long-term averages. The Territory average mean daily minimum temperature for November is 23.1 °C which is only 0.5 °C above normal. Darwin Airport had a mean daily minimum temperature of 24.4 °C, this is the second lowest November mean daily minimum temperature on record and the lowest in 49 years. With a mean daily minimum temperature of 25.8 °C, Centre Island had their lowest November mean daily minimum temperature on record
The coldest night was at Arltunga with 8.1 °C on the 2nd, followed by Alice Springs Airport with 9.7 °C on the 12th, and then Arltunga again with 10.1 °C on the 14th.
The coolest nights on average were at Alice Springs Airport with 18.2 °C, followed by Curtin Springs with 18.3 °C, followed by Arltunga and Yulara Aero which both had a mean daily minimum temperature of 18.7 °C.
The warmest nights on average were at McCluer Island with 27.2 °C, followed by Cape Don with 27.0 °C, and then Warruwi with 26.6 °C.
The warmest night was at Tennant Creek Airport with 30.0 °C on the 17th, followed by Ngukurr with 29.6 °C on the 18th, and then Victoria River Downs with 29.5 °C on the 17th.
The strongest wind gust was at Centre Island with 109 km/h on the 27th as ex-tropical cyclone Alessia strengthened briefly over the Gulf of Carpentaria The next strongest gusts were at Walungurru with 91 km/h on the 23rd, followed by Darwin Airport with 89 km/h on the 12th.
|Extremes in November 2013|
|Hottest day||43.2 °C at Rabbit Flat on the 8th|
|Warmest days on average||38.8 °C at Victoria River Downs|
|Coolest days on average||
31.9 °C at McCluer Island
25.1 °C at Kulgera on the 21st|
8.1 °C at Arltunga on the 2nd|
|Coolest nights on average||
18.2 °C at Alice Springs Airport|
|Warmest nights on average||
27.2 °C at McCluer Island|
|Warmest night||30.0 °C at Tennant Creek Airport on the 17th|
|Warmest on average overall||31.9 °C at Bradshaw|
|Coolest on average overall||26.2 °C at Kulgera|
|Wettest overall||556.8 mm at Stokes Hill|
183.8 mm at Gunn Point on the 24th|
|Highest wind gust||109 km/h at Centre Island on the 27th|
Click on a map to show it full size in a pop-up window
|Record highest November daily rainfall|
Highest daily rainfall
in November 2013 (mm)
|Darwin Airport||104.8||on the 5th||96.8||on the 26th in 1992||73|
|Darwin Botanic Gardens||156.8||on the 5th||112.0||on the 26th in 1992||61|
|Adelaide River Post Office||102.0||on the 28th||88.0||on the 16th in 2007||52|
|Centre Island||162.8||on the 27th||68.6||on the 20th in 1973||45|
|McArthur River Mine||138.0||on the 27th||72.4||on the 11th in 1970||43|
|Lambell's Lagoon||105.6||on the 5th||99.6||on the 5th in 2006||32|
|Nightcliff Pool||82.6||on the 5th||72.9||on the 8th in 1971||32|
|Palmerston||78.2||on the 5th||73.0||on the 10th in 1998||29|
|Mount Sanford||128.0||on the 24th||57.0||on the 30th in 1997||28|
|Stokes Hill||160.2||on the 24th||140.0||on the 17th in 1976||26|
|Mary River Rangers||79.8||on the 29th||73.0||on the 10th in 1998||25|
|Shoal Bay||83.0||on the 24th||71.0||on the 3rd in 2012||22|
|Bing Bong Port||90.0||on the 23rd||68.0||on the 12th in 1998||18|
|Kalkarindji||66.0||on the 24th||63.8||on the 4th in 2007||15|
|Ngayawili||74.6||on the 23rd||54.8||on the 23rd in 2007||15|
|Adelaide River Town||90.5||on the 28th||69.5||on the 16th in 2007||14|
|Dorisvale Crossing||66.5||on the 22nd||54.5||on the 18th in 2012||14|
|Wongalara||67.8||on the 27th||54.0||on the 20th in 2011||13|
|Upper Katherine River||71.5||on the 25th||66.5||on the 30th in 2008||12|
|West Waterhouse||56.4||on the 27th||49.8||on the 30th in 2009||12|
|Adelaide River West||72.5||on the 15th||57.5||on the 19th in 2008||11|
|Snowdrop Creek||98.8||on the 20th||78.8||on the 23rd in 2004||11|
|Pinelands||110.2||on the 5th||82.0||on the 18th in 2010||10|
|Upper Wickham River||125.6||on the 24th||57.8||on the 28th in 2008||10|
|Record highest total November rainfall|
for November 2013 (mm)
|Darwin Botanic Gardens||515.6||353.7||in 1891||61||132.6|
|Centre Island||349.0||249.5||in 1973||45||44.3|
|McArthur River Mine||346.8||266.0||in 2011||42||60.9|
|Channel Island||299.0||279.2||in 1938||40||135.9|
|Nhulunbuy DTW||173.7||157.4||in 1999||37||29.8|
|Mount Sanford||167.8||158.0||in 2000||27||63.9|
|Stokes Hill||556.8||264.1||in 1982||26||126.9|
|Mary River Rangers||223.8||219.7||in 1995||25||138.0|
|Wagait Beach||357.9||290.0||in 1988||24||138.8|
|Bing Bong Port||177.0||135.9||in 1999||18||53.2|
|CSIRO Berrimah||263.6||255.2||in 2010||18||145.0|
|Shoal Bay||265.0||248.4||in 2012||18||116.0|
|Beeboom Crossing||162.0||136.0||in 2008||16||53.3|
|Adelaide River Town||188.0||171.0||in 2008||14||85.3|
|Birdie Creek||191.5||143.0||in 2003||14||83.1|
|Dorisvale Crossing||143.0||138.5||in 2012||14||50.9|
|West Waterhouse||223.2||102.6||in 2002||12||70.9|
|Adelaide River West||292.5||180.0||in 2008||11||123.8|
|Beswick Bridge||147.5||86.0||in 2004||11||56.3|
|Darwin River Ridge||258.0||213.0||in 2007||11||158.5|
|Foelsche Headland||173.8||149.4||in 2005||11||67.1|
|Maranboy Hill||223.6||163.0||in 2003||11||93.1|
|Snowdrop Creek||345.2||157.2||in 2003||11||103.3|
|Upper Adelaide River||258.8||188.8||in 2012||11||106.8|
|Adelaide River East||228.0||215.5||in 2011||10||145.4|
|The Chase||328.6||194.4||in 2011||10||149.0|
|Upper Wickham River||155.0||79.8||in 2008||10||43.9|
|Highest total November rainfall for at least 10 years|
for November 2013 (mm)
Most recent November
at least this wet
|Darwin Airport||317.2||370.8||in 1964||49||141.8|
|Victoria River Downs||144.6||187.8||in 1981*||31||60.7|
|Humpty Doo Collard Road||259.5||300.8||in 1988*||24||175.2|
|Elizabeth Valley||253.6||266.6||in 1995*||17||161.2|
|McMinns Lagoon||292.0||299.4||in 1998||15||190.3|
|Adelaide River Post Office||269.0||301.2||in 1999||14||139.0|
|Jabiru Airport||178.4||217.2||in 2000||13||143.8|
|Rabbit Flat||102.2||104.4||in 2000||13||43.3|
|Delamere Weapons Range||141.6||151.2||in 2001||12||75.1|
|Darwin Hospital||212.8||228.2||in 2002||11||125.7|
|Port Keats Aero||102.8||161.0||in 2003||10||78.5|
|Upper Waterhouse River||168.6||180.2||in 2003||10||76.8|
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.
|Record highest November temperature|
in November 2013 (°C)
|Middle Point||40.5||on the 1st||40.0||on the 4th in 2003||13||36.2|
|Record lowest November daily maximum temperature|
Lowest daily maximum
in November 2013 (°C)
|Wollogorang||25.4||on the 27th||26.0||on the 11th in 1998||31||37.4|
|Groote Eylandt Airport||28.1||on the 26th||29.0||on the 3rd in 2010||15||34.4|
|Ngayawili||29.4||on the 24th||30.5||on the 23rd in 2005||15||33.2|
|Maningrida Aero||29.6||on the 25th||30.3||on the 23rd in 2004||11||33.8|
|Milingimbi||29.1||on the 25th||30.4||on the 3rd in 2010||11||33.7|
|Record lowest November mean daily maximum temperature|
Mean daily maximum
for November 2013 (°C)
|Dum In Mirrie||32.5||= 32.5||in 2003||15||32.9|
|Record lowest November mean daily minimum temperature|
Mean daily minimum
for November 2013 (°C)
|Centre Island||25.7||25.8||in 1982||39||26.8|
|Summary statistics for November 2013|
|Darwin-Daly (district 14GA)|
|Central Arnhem Plateau||35.1||38.8||1st||23.3||21.4||15th||188.8||113.8||high||166%|
|Croker Island Airport||33.6||35.3||14th||26.4||24.3||25th||49.0|
|Darwin Airport||32.9||-0.4||35.0||4th||24.5||-0.8||21.3||5th||317.2||141.8||v high||224%|
|Delamere Weapons Range||37.7||+0.2||40.7||3rd||24.8||+0.1||21.0||3rd||141.6||75.1||high||189%|
|Douglas River||36.7||-0.1||40.8||1st||23.9||+0.4||21.3||5th||217.2||118.5||v high||183%|
|Dum In Mirrie||32.5||-0.4||33.5||18th||25.7||-0.3||22.8||5th||174.8||131.0||high||133%|
|Katherine Country Club||37.9||41.0||5th||25.3||23.1||18th||143.0|
|Port Keats Aero||34.0||-0.3||36.6||19th||25.2||-0.2||22.1||5th||102.8||78.5||high||131%|
|Arnhem (district 14BC)|
|Groote Eylandt Airport||33.6||-0.8||36.4||8th||23.7||+0.2||19.5||5th||238.4||130.2||high||183%|
|North East Island||32.5||34.1||12th||26.1||23.9||5th||78.2||46.4||high||169%|
|Roper-Mcarthur (district 14DE)|
|McArthur River Mine||38.0||-0.6||42.2||16th||24.3||+0.2||18.6||2nd||346.8||60.9||highest||569%|
|Victoria (district 14F)|
|Victoria River Downs||38.8||+0.4||42.0||17th||24.5||0.0||17.3||3rd||144.6||60.7||v high||238%|
|Barkly (district 15A)|
|Tennant Creek Airport||37.2||+0.8||41.0||16th||24.7||+1.0||21.7||22nd||39.8||41.1||average||97%|
|Alice Springs (district 15B)|
|Alice Springs Airport||35.3||+1.7||41.3||7th||18.2||+0.3||9.7||12th||1.0||28.7||low||3%|
|Territory Grape Farm||36.7||+1.3||41.0||7th||20.2||+1.6||14.2||2nd||31.6||31.9||average||99%|
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 9 am on Monday 2 December 2013. 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
all available years of record, which vary widely from site to site.
They are not shown for sites with less than 10 years of record, 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.
The ACORN-SAT dataset is being used for temperature area averages from December 2012 onwards. The major change from earlier datasets is that the ACORN-SAT dataset commences in 1910, rather than 1950, and hence rankings are calculated using a larger set of years.