Wednesday, 1 May 2013 - Monthly Climate Summary for Tasmania - Product code IDCKGC17R0
Isolated showers produced heavy rain and localised flooding in the southeast on the 9th, but April rainfall was average to below average elsewhere. Strong winds and warm temperatures saw fires flare in the south on the 27th, the strong winds also causing damage to property.
Isolated showers produced very heavy rainfall in the southeast overnight on 8 April. Eaglehawk Neck reported 156 mm over the 24 hours to 9am on 9 April, its wettest April day on record and 2nd wettest day on record for any time of year. Copping recorded a daily total of 103 mm, 38 mm of that in an hour, and Catamaran a daily total of 92 mm. The heavy rain caused some localised flash flooding around Boomer Bay and Eaglehawk Neck, a bridge at Boomer Bay being washed away.
The heavy rain resulted in above average April rainfall in a small area of the southeast, but monthly rainfall totals were average to below average elsewhere across Tasmania. The driest site was The Den in the Central Plateau with 8.8 mm, whilst the wettest was Mount Read with 353.2 mm.
An approaching cold front directed very strong northwesterly winds across Tasmania on the 27th, pushing temperatures into the mid-twenties in the southeast. Maximum wind gusts reached 96 km/h in Hobart and 113 km/h at Cape Bruny. The warm and very windy conditions, in addition to dry vegetation and soil saw bush fires flare near Tea Tree, Cygnet, Judbury, Ouse and Campania. The fire at Tea Tree burnt 600 ha.
In addition to the fires, the strong winds caused some damage to property and downed trees and power lines, leaving thousands of premises without power across Tasmania.
Following on from a record warm March, maximum temperatures continued to be warmer than average in April, by up to 1 °C in most areas. Days were warmest between the 5th and 13th and on the 27th in warm northerly winds. Campania (Kincora) reached 26.7 °C on the 27th, the warmest day of the month. There were also a few cold days, temperatures remaining below 15 °C in most areas between 18 and 19 April when a southerly flow brought snow showers to Mount Wellington and the central highlands. Mount Wellington 's maximum of only 0.1 °C on the 19th was the coldest day of the month.
Cold nights were common in April, a notable cold period extending from the 12th to the 25th. In the west, Marrawah had its coldest April night in 42 years with a low of 3.0 °C on the 19th, and on the 20th Strahan recorded a low of -0.2 °C, its lowest April temperature on record. There were a few mild nights in April, the warmest of those between the 7th and 10th and later in the month around the 27th. King Island Airport's minimum of 16.5 °C on the 27th was the highest of the month.
Overall, minimum temperatures were generally below average, by up to 1 °C in most areas. The lowest temperature of the month was -4.8 °C recorded at Liawenee on the 16th, its coldest April night in 3 years.
Hobart had a mix of warm and cold days, as is usual in April; the warmest day was 25.0 °C on the 27th and the coldest 12.5 °C on the 19th, Hobart's coldest April day since 2009. There were a few mild nights but most nights were cold; 5.7 °C on the 16th Hobart's lowest temperature of the month. Overall, minimum and maximum temperatures were just above average, by +0.4 °C and +0.6 °C respectively.
Hobart received 21.2 mm of rain, less than half the April average of 51.4 mm. More than half of that fell on the 19th, when 11 mm of rain was recorded. There were 14 rain days, which is two days above average for April.
January to April 2013 has been drier than normal for most, largely due to below average rainfall in many areas in January, February and April. Some sites in the north and west had close to average rainfall. Maximum temperatures are 1 to 2 degrees above average, and minimum temperatures up to 1 degree above average.
|Extremes in April 2013|
|Hottest day||26.7 °C at Campania (Kincora) on the 27th|
|Warmest days on average||19.3 °C at Larapuna (Eddystone Point)|
|Coolest days on average||7.6 °C at Mount Wellington|
|Coldest day||0.1 °C at Mount Wellington on the 19th|
|Coldest night||-4.8 °C at Liawenee on the 16th|
|Coolest nights on average||1.0 °C at Liawenee|
|Warmest nights on average||12.3 °C at Swan Island|
|Warmest night||16.5 °C at King Island Airport on the 27th|
|Warmest on average overall||15.3 °C at Larapuna (Eddystone Point) and Swan Island|
|Coolest on average overall||4.6 °C at Mount Wellington|
|Wettest overall||353.2 mm at Mount Read|
|Driest overall||8.8 mm at The Den|
|Wettest day||156.4 mm at Eaglehawk Neck (Jetty Road) on the 9th|
|Highest wind gust||156 km/h at Maatsuyker Island Lighthouse on the 27th|
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|Record highest April daily rainfall|
Highest daily rainfall
in April 2013 (mm)
|Eaglehawk Neck (Jetty Road)||156.4||on the 9th||91.4||on the 19th in 1957||90|
|Highest total April rainfall for at least 20 years|
for April 2013 (mm)
Most recent April
at least this wet
|Eaglehawk Neck (Jetty Road)||207.4||247.7||in 1957*||47||74.9|
* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported.
|Record lowest April temperature|
in April 2013 (°C)
|Strahan Aerodrome||-0.2||on the 20th||1.2||on the 29th in 2009||21||8.4|
|Summary statistics for April 2013|
|Northern (district 91)|
|Bridport (Sea View Villas)||17.9||-0.2||21.5||7th||9.1||-0.4||4.4||30th||30.7||60.5||low||51%|
|Burnie (Round Hill)||18.2||+0.5||20.7||1st||10.2||+0.2||5.0||19th||57.8||74.4||average||78%|
|Cape Grim BAPS (Comparison)||16.9||+0.4||21.1||7th||11.3||-0.1||5.3||19th||41.0||67.2||low||61%|
|Cressy Research Station||18.0||-0.2||22.8||8th||4.7||-0.9||-3.7||30th||13.4||43.0||low||31%|
|Launceston (Ti Tree Bend)||19.1||+0.2||24.2||7th||6.7||-0.9||0.5||30th||20.6||52.2||low||39%|
|Luncheon Hill (Forestry)||15.9||+0.3||23.4||7th||7.6||-0.5||0.9||19th||118.0||104.8||average||113%|
|Scottsdale (West Minstone Road)||17.0||-1.0||21.7||8th||7.7||-0.3||1.1||30th||34.0||79.8||low||43%|
|Sheffield School Farm||16.5||0.0||20.5||9th||6.4||-0.6||1.4||30th|
|East Coast (district 92)|
|Bicheno (Council Depot)||19.0||+0.1||24.0||13th||10.1||-0.2||5.9||24th||47.5||59.8||average||79%|
|Fingal (Legge Street)||17.8||-0.5||23.1||7th||4.2||-1.3||-4.6||30th||30.8||51.9||average||59%|
|Lake Leake (Elizabeth River)||13.9||-0.3||19.3||7th||3.4||-0.8||-2.7||30th||26.6||69.2||low||38%|
|Larapuna (Eddystone Point)||19.3||+1.2||24.2||7th||11.3||-0.2||6.4||30th||33.2||66.2||low||50%|
|Maria Island (Point Lesueur)||17.5||21.5||7th||10.8||7.6||30th||25.6|
|Orford (Aubin Court)||17.9||-0.5||23.3||27th||7.0||-1.4||3.7||30th||24.6||57.6||low||43%|
|St Helens Aerodrome||18.5||+0.1||22.4||27th||9.0||-0.7||3.1||30th||18.8||58.1||v low||32%|
|Swansea (Francis Street)||18.9||25.0||13th||8.2||1.3||30th||39.4|
|Midlands (district 93)|
|Ross (The Boulevards)||17.7||+0.2||23.7||9th||4.3||-1.4||-4.1||30th||10.8||36.0||low||30%|
|Southeast (district 94)|
|Cape Bruny (Cape Bruny)||16.6||+0.2||23.4||27th||9.7||-0.2||7.0||12th||50.4||54.9||average||92%|
|Cape Bruny Lighthouse||16.0||+0.5||23.3||27th||9.8||+0.2||7.0||12th||50.7||79.8||low||64%|
|Dunalley (Stroud Point)||17.4||25.3||27th||10.5||7.7||19th||82.4|
|Geeveston (Cemetery Road)||17.0||-0.3||24.2||27th||6.2||-0.1||-0.8||12th||45.8||64.5||low||71%|
|Grove (Research Station)||17.6||25.4||27th||5.4||-1.4||12th||36.4|
|Hobart (Ellerslie Road)||17.9||+0.6||25.0||27th||9.4||+0.4||5.7||16th||21.2||51.2||low||41%|
|Maatsuyker Island Lighthouse||14.6||+0.1||20.6||27th||9.7||+0.2||6.2||29th||72.4||108.5||low||67%|
|Melton Mowbray (North Stockman)||17.4||+0.1||23.9||27th||5.5||-0.3||-0.4||12th||13.4||29.0||low||46%|
|Tunnack Fire Station||15.6||+0.3||21.7||27th||4.1||-1.2||-1.9||16th||26.8||45.1||low||59%|
|Derwent Valley (district 95)|
|Bushy Park (Bushy Park Estates)||18.8||+0.9||25.3||27th||5.6||-0.6||-1.0||12th||9.6||46.2||v low||21%|
|Maydena Post Office||15.7||-0.2||22.7||27th||4.5||-1.0||-0.3||17th||65.1||82.7||low||79%|
|Ouse Fire Station||18.3||0.0||24.7||27th||5.2||+0.3||-2.1||12th||11.8||30.2||v low||39%|
|Central Plateau (district 96)|
|Lake St Clair National Park||12.6||-0.4||19.4||7th||2.5||-0.4||-2.1||21st||161.8||136.5||high||119%|
|West Coast (district 97)|
|Cape Sorell||16.9||+1.4||22.2||6th||10.5||+0.2||5.4||19th||53.0||109.4||v low||48%|
|Hartz Mountain (Keoghs Pimple)||10.5||-0.5||18.9||7th||3.9||-0.6||0.3||19th||76.4||69.8||average||109%|
|Low Rocky Point||16.2||21.0||6th||9.8||4.4||20th||87.4||110.2||low||79%|
|Scotts Peak Dam||14.4||-0.3||22.9||7th||6.2||-0.6||2.3||19th||140.2||128.2||average||109%|
|King Island (district 98)|
|King Island Airport||18.0||+0.3||22.7||6th||10.1||-0.4||3.8||12th||40.4||57.1||low||71%|
|Flinders Island (district 99)|
|Flinders Island Airport||19.1||+0.4||24.0||13th||10.4||-0.3||3.5||4th|
|Antarctica and Macquarie Island (district 300)|
|Macquarie Island||7.0||0.0||8.5||13th||3.7||0.0||-0.9||19th||137.2||93.7||v high||146%|
A Monthly Climate Summary is prepared to list the main features of the weather in Tasmania 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 Wednesday 1 May 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.