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Monday, 1 July 2013 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0
June 2013 in WA can be summarised as being unseasonally wet in the north, largely due to heavy rainfall events from a series of cloudbands, and extraordinarily dry in the south, particularly in the Southwest Land Division (SWLD), due to a lack of strong cold frontal activity.
Rainfall was above to very much above average over much of the Kimberley, Pilbara, Northern Interior, central and northeast Gascoyne, northern parts of the Southern Interior, and the far northern Goldfields. Parts of the central and east Pilbara and west Kimberley recorded their wettest June on record, with monthly totals over 200 mm reported. In contrast, below to very much below average rainfall was evident in most of the SWLD, southern Gascoyne, Goldfields, and Eucla. A significant number of sites in the SWLD, particularly in central and northern parts saw their lowest June rainfall on record, with many recording less than 10 mm for the month.
Averaged across the state as a whole, rainfall during June 2013 was above average as a result of the widespread high rainfall totals in the north. For the SWLD, June 2013 was the driest June since comparable records commenced in 1900, while for the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay), it was the second driest June on record, and trailed June 2006, the driest June on record, by only a very small margin. The Lower Southwest has now recorded its four lowest June rainfall totals since 1900 in the past 13 years (2006, 2013, 2001, 2010), whilst the SWLD has recorded four of its five lowest June totals in the past 13 years (2013, 2006, 2001, 1976, 2010).
At the start of June 2013, a Northwest Cloudband over northern and central WA produced widespread rain with moderate to heavy falls in the Pilbara, east Gascoyne, northern Goldfields, and west Kimberley. A weak tropical low drifting close to the west Kimberley coast on the 5th and 6th brought thunderstorms and a re-intensification of the cloudband over northern WA with extremely heavy falls reported in the west Kimberley. West Roebuck, near Broome, recorded 202.0 mm in the 24 hours to 9am on the 6th, which was the highest daily total recorded during the event and WA's seventh wettest June day on record. A few other sites in the region registered their highest daily rainfall in June on record on the 6th or 7th, with 146.4 mm at Broome Airport on the 6th exceeding the previous June daily record at the airport of 127.0 mm on 24 June 1968, and also exceeding the highest June daily rainfall at the Broome Post Office of 143.0 mm on 15 June 1901, thus being the wettest June day in the town since recording began in 1889.
A weak cold front moved through the SWLD on the 8th and a low that developed in the wake of the front and moved along the WA south coast on the 9th brought the first widespread rainfall to the SWLD for the month, with moderate falls in southern parts and generally light falls inland. Cold fronts also brought rainfall to the SWLD on the 16th and 17th, and from the 22nd to 25th, but falls were generally modest.
Cloudbands moved through western and central WA from the 11th to 15th and produced moderate to heavy falls mainly in the Gascoyne, whilst another cloudband moved through the northern half of WA from the 17th to 19th bringing moderate rainfall to the Pilbara and Northern Interior. Another cloudband, associated with a tropical low northwest of WA, developed over the northwest on the 23rd and slowly moved eastward dissipating on the 29th over the Kimberley. Widespread rainfall was reported across northern WA as the cloudband moved through, and the Pilbara saw exceptionally heavy rainfall from late on the 23rd to the morning of the 25th. A number of sites in the Pilbara recorded June daily rainfall records in the 24 hours to 9am on the 25th including Roebourne, which recorded 223.6 mm, the highest daily fall in the State in June 2013, the highest June daily fall at the site since records commenced in 1887, and the second highest daily fall at the site for any month, only behind 233.7 mm on 7 March 1945. It was also the third wettest June day on record in WA behind 304.6 mm on 4 June 2002 at Exmouth and 272.2 mm on 11 June 1992 at Urala (Pilbara) .Karratha also recorded its second wettest day on record with 209.4 mm on the 25th, only behind 212.4 mm on 10 January 2006 as tropical cyclone Clare moved past the town.
Above to very much above average mean maximum temperatures were observed in most of the Kimberley in June, as well as in parts of the southwest Gascoyne, western parts of the Southwest Land Division, and the Eucla, with areas up to 2 °C warmer than normal in a large part of the Kimberley, and in the southwest Gascoyne and northern Central West. A broad band of below to very much below average mean maximum temperatures was observed over the far west Kimberley, most of the Pilbara, east Gascoyne, western and southern Northern Interior, much of the Southern Interior, and northern Goldfields, roughly corresponding with the path of cloudbands during the month. Telfer in the east Pilbara and Giles in the Southern Interior recorded their lowest June mean maximum temperatures on record as areas of the east Pilbara and western Northern Interior registered mean maxima up to 4 °C below normal.
Averaged across the state as a whole, the mean maximum temperature for WA in June 2013 was near average, while for the Lower Southwest (southwest of a line from Jurien Bay to Bremer Bay) the mean maximum temperature was above average.
At the start of June 2013, northern and central WA experienced cold days with
daily maxima in the low-to-mid teens as a result of a cloudband in the region
. Mandora in the west Kimberley recorded a maximum temperature of 16.4 °C,
which was its coldest June day in 52 years of record, 2.0 °C lower
than the previous record set on 12 June 1998. Large parts of WA recorded unusually
high temperatures from the 8th to the 11th as a relatively static pressure pattern
brought persistent easterly winds across much of the state. A particularly warm
day was reported in the Pilbara on the 10th as daily maxima in the mid-thirties
were registered and Onslow Airport recorded a daily maximum temperature of 33.5 °C,
its hottest June day in 47 years of record. The deluge in northwest WA on the
24th resulted in the coldest June day on record at Learmonth Airport in the
west Pilbara, with a daily maximum temperature of 17.5 °C.
Most of the northern half of the State, as well as eastern and central parts, saw above to very much above average mean minimum temperatures during June 2013, with means up to 4 °C warmer than normal in parts of the Kimberley and Southern Interior. Troughton Island off the north Kimberley coast experienced its warmest June nights in 33 years of record with a mean minimum of 25.6 ºC. Below average mean minimum temperatures were reported in the west Gascoyne, and northern and central parts of the Southwest Land Division, with up to 3 °C cooler than normal mean minima in the Shark Bay region of the Gascoyne.
Averaged across the state as a whole, the mean minimum temperature for WA in
June 2013 was above average, while averaged across the Lower Southwest (southwest
of a line from Jurien Bay to Bremer Bay) the mean minimum temperature in June
2013 was near average.
Troughton Island recorded a daily minimum temperature of 27.1 °C on both the 1st and 6th, which equalled the warmest June night on record at the site, also recorded on 2 June 2007, and became the equal second highest June minimum on record in WA, the highest being 27.2 ºC at Cockatoo Island on 1 June 1971. Following a record warm day-time temperature on the 10th, Onslow Airport endured a record warm June night as cloud moved over the area with a daily minimum temperature of 23.3 °C on the 11th. Cloudy conditions also saw a record high overnight temperature at Warmun in the east Kimberley on the 29th with 24.5 °C.
On the 9th, a low moving along the WA south coast triggered a line of thunderstorms near Albany. A line of damage approximately 500 metres long and 80 metres wide was reported from Elleker, west of Albany town, and hail the size of olives to golf balls was reported.
Early on the 25th, a tornado reportedly moved through the Port Hedland port and then a construction area, causing some localised damage to vehicles and signs.
|Extremes in June 2013|
|Hottest day|| 36.2 °C at Wyndham
Aero on the 2nd
35.6 °C at Wyndham Aero on the 12th
|Warmest days on average||33.2 °C at Wyndham Aero|
|Coolest days on average||16.0 °C at Katanning|
|Coldest day||11.3 °C at Kalgoorlie-Boulder Airport on the 12th|
|Coldest night||-2.9 °C at Eyre on the 19th|
|Coolest nights on average||3.3 °C at York|
|Warmest nights on average|| 25.6 °C at Troughton
21.3 °C at Truscott
|Warmest night|| 27.1 °C at Troughton
Island on the 1st & 6th
25.4 °C at Cygnet Bay on the 5th & 26th
|Warmest on average overall|| 27.9 °C at Troughton
26.2 °C at Truscott
|Wettest day||223.6 mm at Roebourne on the 25th|
|Highest wind gust||96 km/h at Cape Leeuwin on the 24th|
|Record highest June daily rainfall|
Highest daily rainfall
in June 2013 (mm)
|Roebourne||223.6||on the 25th||133.9||on the 10th in 1968||108|
|Karratha Station||180.0||on the 25th||97.2||on the 13th in 1989||96|
|Bulloo Downs||52.0||on the 25th||51.0||on the 8th in 1993||88|
|Cape Leveque||137.9||on the 7th||130.6||on the 3rd in 1941||83|
|Broome Airport||146.4||on the 6th||127.0||on the 24th in 1968||73|
|Port Hedland Airport||130.0||on the 25th||127.6||on the 5th in 2002||70|
|Pyramid Station||141.2||on the 25th||113.0||on the 13th in 1989||58|
|Cygnet Bay||173.0||on the 7th||96.5||on the 20th in 1968||50|
|Dampier Salt||202.0||on the 26th||75.2||on the 3rd in 1971||44|
|Country Downs||134.0||on the 6th||44.4||on the 19th in 2005||41|
|Karratha Aero||209.4||on the 25th||63.0||on the 5th in 2002||41|
|Paraburdoo Aero||52.4||on the 25th||47.0||on the 12th in 1991||40|
|Record highest total June rainfall|
for June 2013 (mm)
|Port Hedland Airport||253.4||128.6||in 2002||71||24.0|
|Cygnet Bay||195.8||138.8||in 1978||50||22.0|
|Dampier Salt||236.3||202.5||in 1989||44||36.9|
|Country Downs||197.2||86.0||in 2005||41||15.5|
|Karratha Aero||271.6||179.3||in 1989||41||35.6|
|Telfer Aero||101.0||68.2||in 1998||40||14.3|
|Record lowest total June rainfall|
| Total rainfall
for June 2013 (mm)
| Previous driest
|Doongin Peak||2.6||8.0||in 2001||119||55.3|
|Arthur River||20.8||24.4||in 1893||118||83.3|
|Wongan Hills||3.4||17.4||in 1912||107||70.8|
|Three Springs||4.0||12.0||in 2006||106||74.4|
|Bruce Rock||4.2||10.4||in 1922||96||51.7|
|Hines Hill||5.4||8.0||in 1997||90||43.0|
|Salmon Gums||5.4||8.9||in 2008||79||39.6|
|Happy Valley||5.4||8.8||in 2001||77||58.3|
|Wongan Hills Res.Station||4.8||16.7||in 2010||76||61.8|
|King Rocks||7.8||12.8||in 2010||75||47.1|
|Bindi Bindi East||4.6||13.2||in 2010||70||67.3|
|Perth Airport||22.0||27.8||in 2006||70||160.0|
|Dandaragan West||17.8||19.6||in 2001||60||118.7|
|Pearce RAAF||10.2||21.0||in 2001||59||134.2|
|Amery Acres||2.2||10.0||in 2001||56||64.8|
|Gosnells City||33.2||42.0||in 2006||51||171.5|
|Mosman Park||20.8||36.8||in 2006||41||140.3|
|Swan View||22.0||40.6||in 2006||40||143.3|
|Pickering Brook||18.2||35.8||in 2001||36||175.5|
|Desert Fringe||11.4||15.7||in 1985||33||32.5|
|Gibb Rock||3.6||12.8||in 2001||32||39.7|
|Maida Vale||27.2||45.0||in 2001||32||161.4|
|Beaumont West||14.2||14.6||in 2000||31||44.7|
|Record highest June temperature|
in June 2013 (°C)
|Onslow Airport||33.5||on the 10th||33.2||on the 20th in 2010||48||25.9|
|Record lowest June daily maximum temperature|
| Lowest daily maximum
in June 2013 (°C)
| Previous coolest
|Mandora||16.4||on the 1st||18.4||on the 12th in 1998||52||29.0|
|Learmonth Airport||17.5||on the 24th||17.9||on the 9th in 2001||39||24.9|
|Record lowest June mean daily maximum temperature|
Mean daily maximum
for June 2013 (°C)
|Giles Meteorological Office||17.6||18.0||in 1989||56||20.3|
|Telfer Aero||21.9||22.3||in 1989||39||25.3|
|Record highest June daily minimum temperature|
| Highest daily minimum
in June 2013 (°C)
| Previous warmest
|Warmun||24.5||on the 29th||24.4||on the 1st in 1998||51||13.6|
|Onslow Airport||23.3||on the 11th||22.2||on the 4th in 1957||48||14.2|
|Record highest June mean daily minimum temperature|
| Mean daily minimum
for June 2013 (°C)
| Previous warmest
|Troughton Island||25.6||24.7||in 1973||33||23.2|
|Summary statistics for June 2013|
|North Kimberley (district 01)|
|East Kimberley (district 02)|
|Halls Creek Airport||29.0||+1.8||32.3||26th||16.5||+2.9||11.2||21st||2.0||5.4||high||37%|
|West Kimberley (district 03)|
|Broome Airport||28.4||-0.7||32.1||11th||18.6||+3.5||15.1||24th||187.2||19.7||v high||950%|
|Derby Aero||30.1||-0.3||33.3||11th||18.5||+2.9||13.2||24th||55.6||8.5||v high||654%|
|Fitzroy Crossing Aero||31.0||+0.9||35.0||26th||16.6||+4.1||11.5||14th||35.2||9.7||high||363%|
|West Roebuck||29.0||-1.5||32.6||11th||17.4||+4.8||11.6||21st||228.6||25.3||v high||904%|
|De Grey (district 04)|
|Marble Bar||24.1||-2.8||30.4||10th||14.7||+1.7||9.8||21st||202.0||27.9||v high||724%|
|Pardoo Station||26.1||-2.2||33.0||10th||90.1||27.2||v high||331%|
|Port Hedland Airport||25.2||-2.4||31.0||9th||16.3||+2.2||12.1||21st||253.4||24.0||highest||1056%|
|Fortescue (district 05)|
|Barrow Island Airport||23.4||-0.8||27.6||11th||19.4||+0.8||15.7||20th||214.6||38.8||v high||553%|
|Learmonth Airport||23.8||-1.1||31.1||10th||14.1||+1.0||8.1||21st||114.0||42.5||v high||268%|
|West Gascoyne (district 06)|
|Emu Creek Station||24.7||-1.3||32.1||10th||14.0||+1.4||8.5||22nd||58.5||37.1||high||158%|
|Shark Bay Airport||23.0||-0.9||27.3||11th||11.5||-0.4||7.0||21st||64.8||45.7||high||142%|
|East Gascoyne (district 07)|
|Newman Aero||20.5||-2.6||29.4||10th||10.9||+4.1||2.3||22nd||69.0||15.2||v high||454%|
|Paraburdoo Aero||22.9||-2.3||31.1||10th||12.9||+1.9||6.6||22nd||78.4||23.6||v high||332%|
|Murchison (district 07A)|
|Mount Magnet Aero||19.0||-0.8||24.7||8th||7.7||-0.6||3.2||21st||15.8||20.8||average||76%|
|North Coast (district 08)|
|Central Coast (district 09)|
|Badgingarra Research Stn||18.7||0.0||21.6||22nd||7.6||-0.8||4.8||19th||14.4||102.3||v low||14%|
|Garden Island HSF||19.0||0.0||21.6||22nd||11.7||-0.4||8.0||16th||48.6||115.7||v low||42%|
|Gingin Aero||19.7||+0.1||22.7||22nd||6.0||-1.5||0.6||20th||23.6||115.4||v low||20%|
|Jandakot Aero||19.6||+0.7||22.6||22nd||6.5||-1.0||1.7||20th||51.2||159.5||v low||32%|
|Medina Research Centre||19.7||+0.4||23.1||22nd||7.5||-1.6||2.4||16th||50.3||145.2||v low||35%|
|Perth Metro||19.9||+0.6||23.0||29th||8.0||-0.6||2.6||16th||44.0||129.5||v low||34%|
|South Coast (district 09A)|
|Hopetoun North||18.4||-0.7||22.6||30th||9.0||+0.4||3.3||14th||22.0||47.8||v low||46%|
|North Central (district 10)|
|Cunderdin Airfield||18.5||+0.1||22.0||9th||4.8||-1.2||0.0||28th||3.6||37.7||v low||10%|
|South Central (district 10A)|
|Newdegate Research Station||16.5||-0.1||19.8||30th||4.7||-0.4||-0.7||30th||11.6||49.6||v low||23%|
|Eucla (district 11)|
|Red Rocks Point||19.2||24.4||9th||9.9||5.6||30th||13.0||35.4||v low||37%|
|South East (district 12)|
|Salmon Gums Res.Stn.||16.8||-0.1||20.8||30th||5.2||-0.5||-0.8||14th||18.4||38.0||low||48%|
|Southern Cross Airfield||17.5||-0.4||21.8||8th||3.8||-0.8||-1.0||18th||5.8||27.3||v low||21%|
|North East (district 13)|
|Giles Meteorological Office||17.6||-2.7||25.4||10th||9.1||+1.1||3.6||12th||41.6||17.7||high||235%|
|Offshore Islands (district 200)|
|Christmas Island Aero||26.7||-0.3||28.7||22nd||23.5||+0.3||22.1||18th|
|Cocos Island Airport||28.5||0.0||29.7||13th||24.6||+0.1||23.1||7th||125.8||211.0||low||60%|
|Varanus Island||23.9||-0.9||28.8||11th||20.3||-0.5||17.0||3rd||171.2||27.7||v high||618%|
A Monthly Climate Summary is prepared to list the main features of the weather in Western Australia 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 12 pm 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
(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.