Tuesday, 1 May 2007 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in April 2007

An average month.

Summary

A series of cold fronts and northwest cloud bands brought some relieving rain to parts of the Southwest Land Division and an area from the south and west Pilbara to the north Gascoyne, with above to very much above average rainfall. Some locations registered their wettest April on record, however the mean rainfall across the state this month was near average.

For Western Australia as a whole, both the mean maximum temperature and the mean minimum temperature were above the standard long term (1961−1990) average with anomalies of 0.66°C and 0.36°C respectively.

Some extremes and records for individual locations in WA are tabulated below.

 

Extremes

Hottest day
Highest temperature
40.8°C at Mardie on the 5th
Warmest days on average
Highest mean daily maximum temperature
36.8°C at Fitzroy Crossing Aero
Coolest days on average
Lowest mean daily maximum temperature
20.8°C at Cape Leeuwin
Coldest day
Lowest daily maximum temperature
14.6°C at Rocky Gully on the 9th
Coldest night
Lowest temperature
0.5°C at Jarrahwood on the 26th
Coolest nights on average
Lowest mean daily minimum temperature
8.0°C at Collie East
Warmest nights on average
Highest mean daily minimum temperature
27.2°C at Troughton Island
Warmest night
Highest daily minimum temperature
28.5°C at Troughton Island on the 30th
Wettest overall
Highest total rainfall
147.8 mm at Cape Le Grand Nat Park
Wettest day
Highest daily rainfall
74.0 mm at Dairy Creek on the 25th
Highest wind gust
106 km/h at Cape Leeuwin on the 30th

Records

Record highest total April rainfall
Total rainfall
for April 2007 (mm)
Previous highest
for April
Years of
record
Normal for
April
Gascoyne Junction82.277.2in 197810014.5
Mooloo Downs64.055.5in 19964811.1
Dalgety Downs79.066.8in 19664512.8
Telina Downs136.2108.1in 19704343.4
Erinair100.499.3in 19704042.1
Esperance Aero124.496.4in 20063842.3




Record lowest April mean daily minimum temperature
Mean daily minimum
temperature
for April 2007 (°C)
Previous lowest
for April
Years of
record
Normal for
April
Kalbarri14.214.3in 19713216.2



Record highest April daily minimum temperature
Highest daily minimum
temperature
in April 2007 (°C)
Previous highest
for April
Years of
record
Normal for
April
Southern Cross24.0on the 5th22.6on the 2nd in 19905011.5
Lake Grace Comparison21.3on the 5th21.2on the 1st in 19894211.5



Record lowest April temperature
Lowest temperature
in April 2007 (°C)
Previous lowest
for April
Years of
record
Normal for
April
Albany Airport3.2on the 27th3.3on the 16th in 19864311.6
Esperance5.5on the 28th5.7on the 21st in 19703813.2



Notes

This statement has been prepared based on information available at 12 pm on Tuesday 1 May 2007. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

Normals 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 "normal" rain.

Further information

Yanhui Blockley & Glenn Cook
Western Australia Climate Services Centre
Bureau of Meteorology
Phone (08) 9263 2222
Email climate.wa@bom.gov.au