Northern Territory in June 2013: Dry season pattern in place

June in the NT showed marked signs that the dry season is in full swing. Forty-two stations with more that ten years of records measured 0.0 mm of rainfall for the month. Adelaide River Town saw it's highest total June rainfall on record when it received 1 mm of rain on the 20th, passing it's old record of 0.5 mm set in 2007. Dry season temperatures have been warmer than average; Darwin Airport saw only 2 nights this month with a minimum temperature below 20 °C.

First fire weather warning of the season

On 21 June the Bureau of Meteorology issued their first fire weather warning for the northern fire season. The warning area covered the greater Darwin and rural area and the Vernon area (Batchelor and Litchfield). Bushfire NT issued their first fire ban on the same day.

Although wet season rainfall was generally below average for northern Australia, the short bursts of heavy rain followed by several weeks of sunny and humid weather was ideal for vegetative growth; thus the fuel load is quite high across the Top End as the northern fire season begins. By the end of June the weather had been dry enough for grasses to dry and the fire danger to increase.

Warm nights at Darwin

Even though a dry season pattern has set in, overnight minimum temperatures have been warmer than average this month, especially along the north coast. Darwin Airport had only two nights with a minimum temperature below 20 °C this month, and only four nights below 20 °C for the dry season in total. In an average June, 14 nights see minimum temperatures below the 20 °C mark and about 20 nights in May and June drop below the 20 °C mark. L ast year all 30 nights in June crossed that threshold.

Rainfall

June is typically very dry for the Northern Territory and this month was no exception . This month the Territory average rainfall was only 3.9 mm, which is 3 mm below average for June. A few rainfall events occurred in the northeast Arnhem where a couple of weak gulf lines brought 19.4 mm to Gove Airport, and in the southwest early in the month were a cloudband over Yulara Aero contributed to the total monthly rainfall of 16.6 mm (these were the two wettest locations in the NT this month).

The wettest single day was at Kulgera with 9.0 mm on the 24th, followed by Gove Airport with 8.8 mm on the 2nd, and then Croker Island Airport with 8.2 mm on the 1st.

Although rainfall totals were small, a few sites had their highest total June rainfall on record. With 1.0 mm, Adelaide River Town doubled their previous June record of 0.5 mm set in 2007.

Mean Temperature

When averaging the daily minimum and the daily maximum, the monthly average mean temperature for the Territory this month was 20.1 °C, 1.4 °C above the long-term average for June and the warmest June since 1998.

The warmest mean temperature on average was Cape Don with 28.1 °C, followed by Cape Wessel and Pirlangimpi both with 27.4 °C, and then Jabiru Airport with 27.3 °C.

The coolest mean daily temperature on average was Kulgera with 12.4 °C, followed by Alice Springs Airport with 13.2 °C, and then Arltunga and Yulara Aero with 13.3 °C.

Maximum temperature

The Alice Springs District was the only region of the NT that did not see above- average daily maximum temperatures this month. In the Alice Springs District, the western corner of the NT saw below- average maximums mostly due to increased cloud cover as a northwest cloudband moved over that part of the Territory in the early half of the month. The southeast corner of the NT saw near average maximum temperatures for June. A weak southerly wind surge reached the Top End for only about three days this month, dropping temperatures and dew points. For the rest of the month the temperatures sat above average as the winds maintained an easterly component. When averaged across the Territory , the mean daily maximum temperature for the NT was 26.0 °C, which is 0.7 °C above the long-term average. Pirlangimpi, on Melville Island, was among the few sites to set new records for both their highest June temperature and their highest June mean daily maximum temperature. With a mean daily maximum temperature of 31.5 °C, Tindal RAAF had their warmest June in 17 years (previous June at least this warm was 32.0 °C in 1996)

The hottest day recorded anywhere in the NT was Timber Creek with 35.6 °C on the 27th, and then Douglas River with 35.5 °C on the 12th. The warmest days on average were at Douglas River with 33.5 °C, followed by Bradshaw with 33.1 °C, and then Jabiru Airport and Pirlangimpi both with 33.0 °C.

The coolest days on average were at Kulgera with 17.2 °C, followed by Yulara Aero with 17.9 °C, and then Curtin Springs with 18.2 °C. The coldest day was at Kulgera with 9.8 °C on the 19th, followed by Yulara Aero with 11.5 °C on the 19th, and then Curtin Springs with 11.6 °C on the 19th.

Minimum temperature

Minimum temperatures were above average for most of the Territory this month. The average minimum temperature across the NT in June was 14.21 °C, 2.1 °C above the long- term average. Alice Springs Airport, which sees about 4 days below 0 °C in the average June did not record any sub-zero days this month; 0.3 °C was the lowest daily minimum recorded this month. The mean daily minimum temperature at A lice Springs this month was 7.2 °C which is their warmest June in 17 years. With a mean daily minimum temperature of 21.6 °C Darwin Airport had their warmest June since 1987 when the mean June minimum was 21.8 °C. Several sites had their highest June mean daily minimum temperature on record including Jabiru Airport, Middle Point, and Ngayawili. Ngayawili also saw their warmest June night (highest daily minimum temperature) on record this month when the temperature failed to go below 24.3 °C on the 11th.

The coldest nights in the Territory this month were all at Arltunga with -3.4 °C on the 22nd, –2.8 °C on the 23rd, and – 2.7 °C on the 21st. The coolest nights on average were at Alice Springs Airport with 7.2 °C, followed by Arltunga and Kulgera both with 7.5 °C, and then Curtin Springs with 8.5 °C.

The warmest nights on average were at Cape Wessel with 25.0 °C, followed by Cape Don with 24.9 °C, and then McCluer Island with 24.6 °C. The warmest night was at Cape Don with 26.3 °C on the 7th, followed by Cape Wessel with 26.2 °C on the 13th and again on the 18th.

Wind

The strongest wind gusts around the NT this month were all at coastal locations. The strongest was at McCluer Island with 70 km/h on the 7th, followed by Cape Wessel with 67 km/h on the 30th and 65 km/h on the 7th and on the 9th, and then McCluer Island again, also with 65 km/h on the 30th.

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Extremes in June 2013
Hottest day 35.6 °C at Timber Creek on the 27th
Warmest days on average 33.5 °C at Douglas River
Coolest days on average 17.2 °C at Kulgera
Coldest day 9.8 °C at Kulgera on the 19th
Coldest night -3.4 °C at Arltunga on the 22nd
Coolest nights on average 7.2 °C at Alice Springs Airport
Warmest nights on average 25.0 °C at Cape Wessel
Warmest night 26.3 °C at Cape Don on the 7th
Warmest on average overall 28.1 °C at Cape Don
Coolest on average overall 12.4 °C at Kulgera
Wettest overall 19.4 mm at Gove Airport
Wettest day 9.0 mm at Kulgera on the 24th
Highest wind gust 70 km/h at McCluer Island on the 7th

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window


Record highest June daily rainfall
Highest daily rainfall
in June 2013 (mm)
Previous wettest
for June
Years of
record
Adelaide River Town 1.0 on the 20th 0.5 on the 20th in 2007 12
Bulman AWS 2.0 on the 1st 0.6 on the 25th in 2007 10



Record highest total June rainfall
Total rainfall
for June 2013 (mm)
Previous wettest
for June
Years of
record
Average for
June
Adelaide River Town 1.0 0.5 in 2007 12 0.1
Bulman AWS 2.2 1.0 in 2007 10 0.3
Milingimbi AWS 1.6 = 1.6 in 2004 10 0.4




Record highest June temperature
Highest temperature
in June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Pirlangimpi 34.7 on the 13th 34.6 on the 4th in 1998 31 31.1
Batchelor Aero 43.1 on the 28th 35.8 on the 16th in 2002 15 31.2
Point Fawcett 33.4 on the 11th 33.0 on the 7th in 2003 15 29.4



Record highest June mean daily maximum temperature
Mean daily maximum
temperature
for June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Pirlangimpi 33.0 32.8 in 1998 30 31.1
Dum In Mirrie AWS 31.7 31.3 in 2010 14 30.3
Point Fawcett 31.1 30.9 in 2005 14 29.4
Bradshaw 33.1 32.5 in 2009 11 30.7



Record highest June daily minimum temperature
Highest daily minimum
temperature
in June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Pirlangimpi 25.1 on the 7th 24.5 on the 25th in 1981 31 18.6
Ngayawili 24.3 on the 11th 24.0 on the 25th in 2010 14 20.1



Record highest June mean daily minimum temperature
Mean daily minimum
temperature
for June 2013 (°C)
Previous warmest
for June
Years of
record
Average for
June
Jervois 10.1 10.0 in 1973 45 6.4
Wave Hill 15.8 14.6 in 2005 38 11.2
Jabiru Airport 21.6 21.2 in 2001 36 19.1
Pirlangimpi 21.8 20.4 in 2007 30 18.6
Black Point 23.1 22.8 in 1998 20 21.5
Delamere Weapons Range 17.5 = 17.5 in 2005 16 15.0
Rabbit Flat 11.3 = 11.3 in 1998 16 7.5
Dum In Mirrie AWS 21.0 20.7 in 2001 14 18.6
McCluer Island 24.6 24.5 in 2005 13 23.2
Ngayawili 22.0 21.8 in 2001 13 20.1
Arltunga 7.5 6.6 in 2005 12 3.9
Bradshaw 18.4 18.3 in 2005 11 14.8
Middle Point AWS 17.4 16.2 in 2005 11 14.8



Summary statistics for June 2013
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2013
Diff
from
average
Highest for
June
2013
Mean for
June
2013
Diff
from
average
Lowest for
June
2013
Total for
June
2013
Average
for
June
Rank of
June
2013
Fraction of
June
average
Darwin-Daly (district 14GA)
Batchelor Aero 31.8 +0.6 43.1 28th 18.5 +2.0 11.2 17th 0.8 0.5 high 160%
Black Point 30.9 +1.0 32.9 13th 23.1 +1.6 21.1 17th 6.4 3.4 v high 188%
Bradshaw 33.1 +2.4 35.4 11th 18.4 +3.6 10.9 17th 0 3.4 lowest 0%
Cape Don 31.4   33.1 11th 24.9   22.9 17th 0.6 2.3 average 26%
Central Arnhem Plateau 29.6   31.6 26th 17.7   12.8 17th 0
Channel Point     33.1 2nd 19.5 +2.2 15.2 16th 0 1.0 lowest 0%
Croker Island Airport 30.2   31.9 12th 23.2   21.1 17th 9.0
Darwin Airport 31.8 +1.2 33.4 13th 21.6 +1.7 16.8 17th 0.2 1.9 average 11%
Darwin NTC AWS 30.2   32.1 13th 23.3   20.9 16th
Delamere Weapons Range 30.5 +1.6 33.1 1st 17.5 +2.5 13.5 16th 0 2.7 lowest 0%
Douglas River 33.5 +2.5 35.5 12th 15.9 +2.6 8.1 17th 0 2.3 lowest 0%
Dum In Mirrie AWS 31.7 +1.4 33.5 13th 21.0 +2.4 14.0 17th 1.0 2.2 high 45%
Jabiru Airport 33.0 +1.4 34.9 12th 21.6 +2.5 18.2 17th 0 1.1 lowest 0%
Katherine Country Club 31.8   34.9 12th 16.0   9.1 17th 0.1
Mango Farm 31.9 +0.7 33.9 28th 17.6 +2.1 12.1 18th 0 0.3 lowest 0%
McCluer Island 28.3 +0.5 29.5 13th 24.6 +1.4 23.5 17th 9.2 9.7 high 95%
Middle Point AWS 32.7 +0.8 34.5 12th 17.4 +2.6 11.5 16th 0 0.5 lowest 0%
Murganella Airstrip 31.4   33.3 14th 20.2   16.1 16th 1.2
Pirlangimpi 33.0 +1.9 34.7 13th 21.8 +3.2 16.7 17th 0.4 4.0 average 10%
Point Fawcett 31.1 +1.7 33.4 11th 20.2 +1.5 15.0 17th 0.2 6.8 average 3%
Point Stuart AWS 31.7   34.0 13th 20.3   15.2 16th 0.2 0.3 average 67%
Tindal RAAF 31.5 +1.8 33.9 12th 15.6 +1.6 9.2 16th 0.6 0.8 high 75%
Arnhem (district 14BC)
Cape Wessel 29.9   31.0 10th 25.0   23.5 5th
Gove Airport 29.1 +0.8 30.3 12th 22.7 +1.5 18.8 26th 19.4 30.8 average 63%
Groote Eylandt Airport AWS 29.7 +0.9 31.7 27th 17.9 +1.6 13.2 16th 4.4 5.2 average 85%
Maningrida Aero 31.2   32.5 12th 20.6   17.1 17th 7.4 2.6 high 285%
Milingimbi AWS 31.0   32.3 12th 21.3   19.0 16th 1.6 0.4 highest 400%
Ngayawili 30.5 +1.0 32.1 11th 22.0 +1.9 20.5 3rd 2.6 4.2 average 62%
North East Island 28.5   30.5 11th 24.5   22.8 28th 5.4 5.5 average 98%
Warruwi 30.2 +1.0 32.4 14th 23.3 +1.5 21.9 17th 2.4 2.5 high 96%
Roper-Mcarthur (district 14DE)
Centre Island 27.5 +0.8 31.1 12th 20.9 +1.6 18.6 16th 0 6.9 lowest 0%
Daly Waters AWS 30.8 +2.2 33.7 1st 14.0 +0.9 7.8 24th 0 3.3 lowest 0%
McArthur River Mine 31.0 +1.3 34.4 7th 15.1 +2.7 9.0 16th 0 1.7 lowest 0%
Ngukurr AWS 31.0   34.2 12th 16.4   9.6 16th 0.2
Wollogorang 30.0 +1.1 34.2 12th 12.8 +0.9 7.4 26th 0 2.8 lowest 0%
Victoria (district 14F)
Timber Creek 32.2 +1.9 35.6 27th 17.0 +1.7 10.0 16th 0 2.6 lowest 0%
Victoria River Downs 31.7 +2.5 34.4 28th 14.5 +2.6 7.3 16th 2.4 2.6 high 92%
Wave Hill 30.5 +2.5 33.8 1st 15.8 +4.6 8.5 18th 0 4.5 lowest 0%
Barkly (district 15A)
Brunette Downs 27.9 +1.1 33.3 1st 13.5 +2.2 7.9 25th 0 7.0 lowest 0%
Elliott 29.3 +0.9 33.8 1st 14.7 +2.4 8.4 25th 4.0 4.7 high 85%
Tennant Creek Airport 25.6 +1.2 31.7 1st 14.5 +1.7 7.0 23rd 0 5.2 lowest 0%
Alice Springs (district 15B)
Alice Springs Airport 19.3 -0.5 27.0 11th 7.2 +2.2 0.3 21st 3.4 13.6 average 25%
Arltunga 19.1 -0.1 26.8 11th 7.5 +3.6 -3.4 22nd 0 16.3 lowest 0%
Curtin Springs 18.2 -2.0 26.7 10th 8.5 +3.6 1.0 23rd 12.0 14.0 average 86%
Jervois 21.9 -0.1 28.3 11th 10.1 +3.7 1.1 22nd 0.6 10.6 average 6%
Kulgera 17.2 -1.7 24.7 10th 7.5 +2.2 1.5 23rd 15.4 16.2 average 95%
Rabbit Flat 26.5 +1.1 30.9 1st 11.3 +3.8 2.2 24th 1.2 7.4 average 16%
Territory Grape Farm 22.1 -0.1 28.3 1st 9.9 +3.9 2.6 22nd 1.8 9.0 average 20%
Walungurru 21.0 -2.2 28.3 10th 12.7   9.4 20th 16.0 10.3 high 155%
Yulara Aero 17.9 -2.5 26.2 10th 8.8 +3.3 -0.1 23rd 16.6 18.9 average 88%

Notes

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 10 am on Monday 1 July 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 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.

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.

Further information

Media
(03) 9669 4057
Enquiries