Monday, 2 July 2012 - Monthly Climate Summary for Northern Territory - Product code IDCKGC22R0
Minimum temperatures across the NT were noticeably cool this month with the area averaged minimum temperature ranking as the second lowest on record. The sub-tropical ridge was the dominant climate influence on the NT this month. A series of strong high pressure systems moving across southern and central Australia consistently pushed fresh, cool air north and blocked any rain-bearing systems from reaching the Alice Springs District.
In June the fire danger index (FDI) in the Top End reached severe levels for the first time this year. Dry fuel and gusty winds fanned bush fires across the Top End most of which in Arnhem Land.
Primarily due to the persistence of high pressures systems over the Alice Springs District this month, sites such as Alice Springs Airport and Yulara that usually see 10-20 mm in June did not receive any rainfall in June. A few places in the Alice Springs rainfall district, such as Palm Valley and Jervois, recorded rainfalls of only a few millimeters this month, but were less than half of their long-term average. Elsewhere in the Territory, the most rain that fell was during a weak cloudband event on the 1st and 2nd that mostly impacted the Roper-McArthur district. The wettest overall was Daly Waters with 16.0 mm, followed by North East Island with 8.4 mm, and then Palm Valley with 6.2 mm. There is a map of rainfall deciles below.
The monthly mean of the mean daily temperature (derived from daily maximum and daily minimum) across the NT this month was 17.1 °C which is 1.6 °C below normal, but still not as low as last year's average June temperature of 16.5 °C. The warmest on average was Cape Wessel with 25.8 °C, followed by Cape Don with 25.5 °C, and then McCluer Island with 24.3 °C. The coolest on average was Kulgera with 10.0 °C, followed by Arltunga with 10.6 °C, and then Alice Springs Airport with 11.0 °C.
Maximum temperatures across the NT were below average for most of the month, although there were no lowest daily maxima records broken for the month. Black Point had their lowest June mean daily maximum temperature of 28.4 °C, which is their second coolest June on record and the lowest since June 2000. Constant southeasterly winds kept most of the Territory cool this month. The coolest days on average were at Kulgera with 18.4 °C, followed by Arltunga with 18.7 °C, and then Alice Springs Airport and Yulara Aero both with mean maximum temperatures of 19.9 °C. The coldest days were all at Arltunga with 13.5 °C on the 22nd and the 24th, 13.6 °C on the 23rd and 13.8 °C on the 7th.
Even with the Territory being cool on average, there were still several hot days. The hottest day was at Timber Creek with 36.0 °C (5.7 °C above average) on the 15th, followed by Kidman Springs with 34.9 °C (5.2 °C above average) on the 15th, and then Bradshaw with 34.8 °C (4.1°C above average) on the 15th. The warmest days on average were at Noonamah with a monthly mean daily maximum temperature of 31.5 °C, followed by Middle Point with 31.3 °C, and then Jabiru Airport with 31.2 °C. There is a map of maximum temperature anomalies below.
The average minimum temperature across the Territory this month was 9.8 °C, which is 2.3 ° below normal and marks the second coolest June on record (the record was set last year with an average minimum temperature of 9.1 °C). With several long bursts of cool dry air pushing up from the south, the low humidity levels allowed for overnight minimum temperatures to drop below normal nearly every night. At Darwin airport, the mercury dropped below the long term average of 19.9 °C twenty-six times this month. Alice Springs Airport recorded the the coolest nights in the NT with an average daily minimum temperature of 2.1 °C. The next coolest locations around the Territory were at Curtin Springs and Kulgera with 2.6 °C, followed by Arltunga with 2.7 °C. The warmest nights on average were along the north coast; Cape Wessel had 23.4 °C, followed by Cape Don with 22.2 °C, and then McCluer Island with 22.0 °C.
The coldest night was at Arltunga with -4.0 °C on the 20th, followed by Kulgera with -3.9 °C on the 25th and on the 26th, followed by Alice Springs Airport with -3.4 °C on the 24th, 25th and on the 26th. The warmest nights were at Cape Don with 25.1 °C on the 2nd, 25.0 °C on the 1st, and 24.7 °C on the 3rd.There were six new minimum temperature records set this month. Yulara, Rabbit Flat and Victoria River Downs had their lowest June temperature on record. Gove, Elliot, and Ngayawili each saw their lowest June mean daily minimum temperature on record. There is a map of minimum temperature anomalies below.
The strongest wind gust was at Tennant Creek Airport with 67 km/h on the 24th, followed by Walungurru with 63 km/h on the 24th. McCluer Island, Tennant Creek Airport, and Walungurru all measured a wind gust of 61 km/h on the 23rd, 23rd, and 25th, respectfully.
|Extremes in June 2012|
|Hottest day||36.0 °C at Timber Creek on the 15th|
|Warmest days on average||31.5 °C at Noonamah|
|Coolest days on average||18.4 °C at Kulgera|
13.5 °C at Arltunga on the 22nd|
13.5 °C at Arltunga on the 24th
|Coldest night||-4.0 °C at Arltunga on the 20th|
|Coolest nights on average||2.1 °C at Alice Springs Airport|
|Warmest nights on average||23.4 °C at Cape Wessel|
|Warmest night||25.1 °C at Cape Don on the 2nd|
|Warmest on average overall||25.8 °C at Cape Wessel|
|Coolest on average overall||10.0 °C at Kulgera|
|Wettest overall|| 16.0 mm at Daly Waters |
|Wettest day||11.8 mm at Daly Waters on the 2nd|
|Highest wind gust||67 km/h at Tennant Creek Airport on the 24th|
|Record lowest June temperature|
in June 2012 (°C)
|Victoria River Downs||2.2||on the 25th||2.5||on the 19th in 1976||45||12.0|
|Yulara Aero||-1.8||on the 22nd||-1.3||on the 24th in 2002||26||5.6|
|Rabbit Flat||-1.3||on the 25th||= -1.3||on the 30th in 2004||16||7.6|
|Record lowest June mean daily minimum temperature|
Mean daily minimum
for June 2012 (°C)
|Gove Airport||19.2||19.3||in 2011||33||21.3|
|Elliott||9.5||= 9.5||in 1982||31||12.4|
|Summary statistics for June 2012|
|Darwin-Daly (district 14GA)|
|Central Arnhem Plateau||27.7||31.8||15th||13.6||10.0||22nd||0.4|
|Delamere Weapons Range||28.6||-0.3||33.3||15th||9.5||11th||0||2.9||lowest||0%|
|Dum In Mirrie||29.3||-1.1||32.1||3rd||16.7||-2.0||13.3||7th||0||2.3||lowest||0%|
|Katherine Country Club||29.7||34.0||15th||11.4||7.0||11th||0|
|Port Keats Aero||29.5||-1.2||32.8||17th||15.4||-1.3||10.6||21st|
|Arnhem (district 14BC)|
|Groote Eylandt Airport||27.2||-1.7||30.0||17th||13.7||-2.7||9.9||11th||0.8||5.3||average||15%|
|North East Island||25.9||27.8||17th||21.7||19.4||30th||8.4||5.5||high||153%|
|Roper-Mcarthur (district 14DE)|
|McArthur River Mine||28.5||-1.3||32.3||15th||10.0||-2.5||6.5||20th||0||1.7||lowest||0%|
|Victoria (district 14F)|
|Victoria River Downs||28.0||-1.2||33.9||15th||7.7||-4.3||2.2||25th||0||2.6||lowest||0%|
|Barkly (district 15A)|
|Tennant Creek Airport||23.4||-1.1||30.6||15th||11.1||-1.7||6.7||21st||0||5.3||lowest||0%|
|Alice Springs (district 15B)|
|Alice Springs Airport||19.9||+0.1||27.9||14th||2.1||-2.9||-3.4||24th||0||13.8||lowest||0%|
|Territory Grape Farm||21.3||-0.9||28.8||14th||4.5||-1.6||0.0||24th||0||9.3||lowest||0%|
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 July 2012. 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.