Friday, 1 May 2009 - Monthly Climate Summary for South Australia - Product code IDCKGC23R0
April rainfall over South Australia was average to well above average. Several places, especially in the agricultural areas of the state, received very much above their long term average rainfall totals for the month.
Rainfalls in the pastoral districts were mostly average to very much above average. Totals predominantly ranged between 5 and 20 millimetres with a few places recording more than 30 millimetres.
The highest total was 46.0 mm at Arcoona Bluff in the Gammon Ranges in the Far North district.
Over the agricultural districts rainfall totals were all either average or above average and was recorded mostly over a 4 day period during the last week of the month. Several locations received April monthly rainfall amounts that rank in the top 10% of their records, and many places in the Mount Lofty ranges recorded rainfall totals of over 100 mm.
The highest total was 158.3 mm at Woodhouse, near Piccadilly in the Mount Lofty Ranges, which is also the highest rainfall total in the state.
The average temperature over most of the state was within 1°C above the long-term average however in the southeast of the state and Kangaroo Island the mean temperature was within 1°C below the normal for April.
The mean maximum temperatures over most of the coastal regions, Kangaroo Island, Yorke Peninsula and the central areas around Adelaide were mainly up to 1°C above the long-term normal, with some locations in the Mount Lofty Ranges up to 1.5°C warmer than average. Over the remainder of inland South Australia the mean maximum temperatures were up to 1°C cooler than average with the cooler anomalies being toward the northern areas of the state.
In the pastoral districts of the state the mean maximum temperatures ranged from 23.5°C at Yunta in the North East district to 28.8°C at Moomba Airport and Marree in the Far North district. The highest recorded maximum temperature in the pastoral districts for April was 36.7°C at Marree on the 2nd of the month.
In the agricultural districts the mean maximum temperature ranged from 15.6°C at Mount Lofty to 26.0°C at Port Augusta in the Western Agricultural district. The highest recorded maximum temperature for April in the agricultural areas was 39.0°C at Ceduna AMO on the 1st closely followed by 37.5°C at Streaky Bay both on Eyre Peninsula.
Over the majority of the state the mean minimum temperatures were typically up to 1°C above the long-term average with only a handful of locations marginally below the normal.
In the pastoral districts of the state the mean minimum temperatures ranged from 8.2°C at the Gluepot Reserve in the North East district to 15.8°C at Moomba Airport in the Far North district. The lowest recorded minimum temperature for April in the pastoral districts was 3.1°C at the Gluepot Reserve and Yunta in the North East district on the 16th, with the highest being 22.3°C at the Moomba Airport.
The mean minimum temperatures in the agricultural regions this month ranged from 7.3°C at Coonawarra in the Lower Southeast district to 15.4°C at Neptune Island followed by 14.4°C at Cape Willoughby on Kangaroo Island. The lowest recorded daily minimum temperature for April was 0.2°C at Coonawarra on the 30th.
Some sites had their highest April temperature on record.
Some sites had their coldest April day (lowest maximum temperature) on record.See a map of mean maximum temperatures. See a map of maximum temperature anomalies. See a map of mean minimum temperatures. See a map of minimum temperature anomalies.
|39.0°C at Ceduna AMO on the 1st|
|Warmest days on average|
Highest mean daily maximum temperature
28.8°C at Marree Comparison|
28.8°C at Moomba Airport
|Coolest days on average|
Lowest mean daily maximum temperature
|18.9°C at Parawa (Second Valley Forest AWS)|
Lowest daily maximum temperature
11.7°C at Mount Crawford Fire Tower on the 26th|
11.7°C at Yongala on the 26th
11.7°C at Mount Gambier Aero on the 27th
|0.2°C at Coonawarra on the 30th|
|Coolest nights on average|
Lowest mean daily minimum temperature
|7.3°C at Coonawarra|
|Warmest nights on average|
Highest mean daily minimum temperature
|15.8°C at Moomba Airport|
Highest daily minimum temperature
|24.5°C at Port Pirie Nyrstar Comparison on the 2nd|
Highest total rainfall
|158.3 mm at Piccadilly (Woodhouse)|
|Highest wind gust||102 km/h at Neptune Island on the 25th|
|Record highest April temperature|
in April 2009 (°C)
|Streaky Bay||37.5||on the 1st||37.3||on the 1st in 1986||52||23.7|
|Record lowest April daily maximum temperature|
Lowest daily maximum
in April 2009 (°C)
|Hawker||14.7||on the 26th||14.8||on the 27th in 2008||36||25.5|
In this table, key sites have been highlighted to make them easier to find. This table is very wide and may not fit if printed.
|Summary statistics for April 2009|
|Northwest (district 16)|
|Coober Pedy Airport||26.4||35.7||1st||14.7||8.8||27th||6.4|
|Marla Police Station||27.8||−0.8||36.0||1st||14.2||+0.7||7.7||30th||7.4||10.6||average||70%|
|Far North (district 17)|
|Leigh Creek Airport||26.3||+0.2||35.8||2nd||13.6||+0.8||7.9||27th||12.4||10.2||average||122%|
|Western Agricultural (district 18)|
|Port Augusta Aero||26.0||36.9||2nd||13.1||8.7||27th||10.8|
|Streaky Bay||23.8||+0.2||37.5||1st||13.7||+1.0||10.1||12th||51.8||24.2||very high||214%|
|Upper North (district 19)|
|Northeast (district 20)|
|Lower North (district 21)|
|Clare High School||21.5||32.8||2nd||9.1||3.5||16th||68.6|
|Port Pirie Aerodrome||24.8||35.2||1st||11.1||5.5||7th||21.3|
|Port Pirie Nyrstar Comparison||25.0||+0.2||35.5||1st||13.7||+0.6||10.0||7th||37.4||27.8||high||135%|
|Yorke Peninsula (district 22A)|
|Kangaroo Island (district 22B)|
|Adelaide Plains (district 23A)|
|Parafield Airport||23.4||+0.8||34.7||1st||11.7||−0.1||6.5||10th||84.2||40.1||very high||210%|
|County Light (district 23B)|
|Mount Lofty Ranges (district 23°C)|
|Hindmarsh Island AWS||21.2||34.8||1st||11.9||6.9||30th||40.6|
|Kuitpo Forest Reserve||19.9||31.4||1st||11.3||6.8||26th||91.6|
|Mount Crawford Fire Tower||19.3||31.7||2nd||10.8||5.8||26th||90.6|
|Upper Murray Valley (district 24A)|
|Loxton Research Centre||23.9||0.0||34.1||2nd||8.1||−0.2||2.8||16th||25.4||16.6||high||153%|
|Lower Murray Valley (district 24B)|
|Murray Bridge Comparison||23.9||+0.5||37.0||2nd||10.1||−0.1||6.1||30th||35.8||28.8||high||124%|
|Murray Mallee (district 25A)|
|Upper Southeast (district 25B)|
|Lower Southeast (district 26)|
|Mount Gambier Aero||19.6||+0.2||32.8||2nd||8.4||−0.2||1.9||13th||65.6||54.8||average||120%|
This statement has been prepared based on information available at 10 am on Friday 1 May 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 20 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.