Western Australia in November 2009: A very warm November for WA

  • Very much above average mean maximum temperature for WA
  • Above average mean minimum temperature for WA
  • Near average rainfall for WA

Rainfall

Rainfall was above to very much above average for much of the western and central WA in November 2009, whilst the eastern parts of WA saw below to very much below average rainfall.

A trough in the first week of November produced unseasonal moderate to heavy rainfall in parts of the west Kimberley and Pilbara, resulting in several sites in the areas registering their highest daily rainfall amount or highest monthly rainfall total on record for November. A cold front in mid-November brought moderate to heavy rainfall to the western parts of southwest WA. (see November rainfall decile map). Averaged over the state as a whole, rainfall in November 2009 was above average.

Some sites had their highest November daily rainfall on record. Some sites had their highest total November rainfall on record.

Maximum temperature

With the exception of near average daytime temperatures in parts of the Pilbara, November 2009 saw above to very much above average daytime temperatures across most of WA, with over 4°C warmer than normal maxima in the eastern Eucla (see November maximum temperature anomaly map).

An exceptionally hot spell, which has affected large parts of central and south-eastern Australia, saw several sites in the eastern Interior and Eucla districts of WA registering their highest November temperature. Forrest in the Eucla district registered 15 consecutive days with temperature 35°C or above between 6 and 15 November, as well as 5 consecutive days with temperature 40°C or above between the 10th and 14th. Both exceeded previous records for the longest hot spell for November. For more details, please check the special climate statement . When averaged over the whole state, the mean maximum temperature for November was very much above average.

Some sites had their highest November temperature on record. Some sites had their highest November mean daily maximum temperature on record.

Minimum temperature

Mean minimum temperatures during November 2009 were above to very much above average over much of the southern half of WA and adjacent parts of the Interior, Pilbara and Kimberley, with up to 4°C above average minima in the far eastern Interior and Eucla (see November minimum temperature anomaly map).

A warmer than normal night was experienced in a large part of the Southwest Land Division(SWLD) on the 12th as a broad cloud band covered most of the south and west of the state, with the minima into the mid-20s in the Central Whea Belt district. The state averaged mean minimum temperature was in the above average range.

Some sites had their warmest November night (highest daily minimum temperature) on record.

Further information

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Extremes in November 2009
Hottest day 45.5 °C at Bidyadanga on the 14th
45.5 °C at Mandora on the 15th
Warmest days on average 41.7 °C at Fitzroy Crossing Aero
Coolest days on average 20.3 °C at Windy Harbour
Coldest day 14.4 °C at Shannon on the 19th
Coldest night -0.5 °C at Salmon Gums Res.Stn. on the 3rd
-0.5 °C at Eyre on the 5th
Coolest nights on average 9.4 °C at Bridgetown
Warmest nights on average 28.0 °C at Troughton Island
27.7 °C at Wyndham (mainland)
Warmest night 31.2 °C at Argyle Aerodrome on the 22nd
Wettest overall 104.0 mm at Kilto Station
Wettest day 104.0 mm at Kilto Station on the 6th
Highest wind gust 120 km/h at Esperance on the 6th

Record highest November daily rainfall
Highest daily rainfall
in November 2009 (mm)
Previous highest
for November
Years of
record
Broome Airport 45.8 on the 6th 36.8 on the 10th in 1943 70
Gosnells City 36.5 on the 19th 33.0 on the 16th in 1984 49
Roleystone 42.8 on the 19th 35.6 on the 13th in 1974 42
Karragullen North 37.0 on the 19th 31.5 on the 14th in 1974 39



Record highest total November rainfall
Total rainfall
for November 2009 (mm)
Previous highest
for November
Years of
record
Average for
November
Wittenoom 50.2 34.5 in 1962 60 8.8
Mininer 39.4 30.6 in 2008 46 5.9
Newman Aero 65.2 50.2 in 1985 35 10.5
Paraburdoo Aero 51.4 37.0 in 2006 34 8.5
Tom Price 59.4 45.7 in 1982 33 10.8




Record highest November temperature
Highest temperature
in November 2009 (°C)
Previous highest
for November
Years of
record
Average for
November
Giles Meteorological Office 43.9 on the 17th 43.8 on the 30th in 1996 54 34.3
Eucla 44.5 on the 13th 44.0 on the 23rd in 1982 48 24.1



Record highest November mean daily maximum temperature
Mean daily maximum
temperature
for November 2009 (°C)
Previous highest
for November
Years of
record
Average for
November
Broome Airport 35.5 35.4 in 1944 70 33.6




Record highest November daily minimum temperature
Highest daily minimum
temperature
in November 2009 (°C)
Previous highest
for November
Years of
record
Average for
November
Corrigin 24.7 on the 12th 23.7 on the 23rd in 1977 62 11.3
Hyden 24.8 on the 12th 23.0 on the 23rd in 1977 38 11.3




Notes

This statement has been prepared based on information available at 10 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 all available years of record, which vary widely from site to site. They are not shown for sites with less than 30 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

Further information

Media
(03) 9669 4057
Enquiries