Tasmania in April 2019: Late-season warm days, cool nights, little rain in the east

Tasmania's temperature was close to average for April, with some warm days unusually late in April balanced by some early cold nights. Cold fronts brought rain and wind to the west, but the north and east coasts had a relatively dry month.

Below average rain near the east and north coasts

  • Rainfall was close to average for much of the State, but below average near the east and north coasts and a little above average in the southwest highlands
  • Flinders Island was particularly dry, with Memana having its driest April since 1967 with just 17.2 mm for the whole month
  • Tasmania's total rainfall was about 14% below average
  • A strong high pressure system over the southern Tasman Sea was dominant for much of the month
  • Cold fronts were the main source of rain, especially in the west; particularly strong fronts early on the 6th and late on the 17th brought rain to most areas
  • Westerly winds in the wake of a cold front that crossed early on the 26th brought moderate to locally heavy falls to the west, along with several days of strong and gusty winds: Maatsuyker Island reported a gust over 130 km/h on each day from the 24th to the 27th
  • The first four months of 2019 have been drier than average for most of Tasmania, and especially in the east and north

Late-season warm days, but early cold nights

  • There were unusually warm temperatures on the 16th, 17th, 20th and 21st, but the 26th was cold across the State
  • With temperatures pushing into the high 20s on the 17th, several sites in the southeast set new records for late-season warmth: for example Hobart Airport had not gone above 29 °C in the second half of April before it reached 29.1 °C on the 17th
  • Dover and Cape Bruny had their highest April temperature on record on the 17th
  • The 26th was cold across the State with many areas struggling to reach 10 °C and a few sites having their coldest April day on record
  • The mix of late-season warmth but several cool days meant Tasmania's overall mean maximum temperature was 0.31 °C above average, with the south particularly warm
  • There were several periods of cold nights, starting at the beginning of the month: Liawenee's minimum temperature of -7.3 °C on the 4th was the third-lowest April temperature ever recorded in Tasmania, and the earliest in the season the temperature has dropped so low
  • After more cold nights around the 10th, there was a period of mild nights peaking on the 17th: a few sites had their warmest April night on record
  • The generally cool nights meant Tasmania's overall mean minimum temperature was 0.40 °C below average, although the northwest was generally warmer than average
  • Late warm days, but generally cool nights, gave Tasmania an overall mean temperature just 0.04 °C below average
  • Temperatures have been above average over Tasmania for the first four months of 2019, especially in the east of the State

Late warmth, cool nights and reduced rain for Hobart

  • Mild days were common at Hobart, with some especially warm weather in the third week; The warmest day was 28.7 °C on the 17th
  • There were some cold days, especially later in the month (the coolest day was on the 26th when the temperature reached 12.7 °C)
  • The mean daily maximum temperature for Hobart (Ellerslie Road) was 19.6 °C, which is 2.3 °C above the long-term average
  • Despite mild nights near the middle of the month (the warmest morning was on the 17th when the minimum temperature was 15.8 °C ), there were plenty of cold nights too (coldest morning was 5.4 °C on the 19th) and the mean daily minimum temperature for Hobart (Ellerslie Road) was 9.0 °C, equal to the long-term average.
  • Total rainfall for Hobart (Ellerslie Road) was 32.4 mm, which is about two-thirds of the long-term average
  • Most of Hobart's rain fell in three events: early on the 6th, late on the 7th, and early on the 18th
  • Hobart had 5 days with a maximum gust over 80 km/h, well above the April average of about 2 such windy days, including every day from the 25th to the 28th and a peak gust of 98 km/h on the morning of the 28th
  • Hobart's mean maximum temperature for the first four months of 2019 was record high, with the mean minimum temperature also well above average
  • Hobart (Ellerslie Road) has recorded 86.4 mm of rain in the first four months of 2019, about half the long-term average

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Extremes in April 2019
Hottest day 29.8 °C at Campania (Kincora) on the 17th
Warmest days on average 19.9 °C at Campania (Kincora)
Coolest days on average 8.6 °C at Mount Read
Coldest day 0.4 °C at kunanyi (Mount Wellington Pinnacle) on the 26th
Coldest night -7.3 °C at Liawenee on the 4th
Coolest nights on average 1.2 °C at Liawenee
Warmest nights on average 13.0 °C at Hogan Island
Warmest night 20.2 °C at Maatsuyker Island Lighthouse on the 17th
Warmest on average overall 15.6 °C at Hogan Island and Swan Island
Coolest on average overall 5.8 °C at Mount Read
Wettest overall 390.4 mm at Mount Read
Driest overall 10.8 mm at Friendly Beaches
Wettest day 79.2 mm at Mount Read on the 28th
Strongest wind gust 135 km/h at Maatsuyker Island Lighthouse on the 24th, 25th and 26th

Maps
ObservedAnomalyDecile rank
Total
rainfall
Map of Rainfall totals Map of Percentage of normal rainfall Map of Rainfall deciles
Mean
daily
maximum
temperatures
Map of Mean maximum temperature Map of Anomaly in mean maximum temperature Map of Decile rank of mean maximum temperature
Mean
daily
minimum
temperatures
Map of Mean minimum temperature Map of Anomaly in mean minimum temperature Map of Decile rank of mean minimum temperature

Click on a map to show it full size in a pop-up window



Lowest April total rainfall for at least 20 years
Observed
(mm)
Most recent
lower
Average for
April
Memana (Babel Farm) 17.2 11.5 in 1967* 58.4

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported




Record highest April temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Dover 29.1 on the 17th 28.6 on the 2nd in 2005 30 16.9
Cape Bruny (Cape Bruny) 27.7 on the 17th 27.0 on the 2nd in 2002 22 16.6



Record lowest April daily maximum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Wynyard Airport 10.3 on the 26th 10.7 on the 29th in 1966 34 17.6
Dover 9.5 on the 26th 9.6 on the 27th in 2009 30 16.9
Luncheon Hill (Forestry) 7.6 on the 26th 8.0 on the 20th in 2006 24 15.7
Sheffield School Farm 9.0 on the 26th 9.2 on the 20th in 2006 23 16.5



Record highest April daily minimum temperature
New record
(°C)
Old
record
Years of
record
Average for
April
Maatsuyker Island Lighthouse 20.2 on the 17th 19.5 on the 12th in 1985 63 9.5
Strahan Aerodrome 20.0 on the 17th 18.0 on the 4th in 1992 27 8.5
King Island Airport 18.6 on the 17th 17.6 on the 1st in 2005 24 10.6
Cape Bruny (Cape Bruny) 17.3 on the 17th 16.9 on the 27th in 2016 22 10.0
Cape Sorell 19.0 on the 17th 18.1 on the 10th in 1961 22 10.3



Summary statistics for April 2019
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2019
Diff
from
average
Highest for
April
2019
Mean for
April
2019
Diff
from
average
Lowest for
April
2019
Total for
April
2019
Average
for
April
Rank of
April
2019
Fraction of
April
average
Northern (district 91)
Cape Grim 16.3   20.0 16th 11.6   5.8 19th 72.2
Cape Grim BAPS (Comparison) 16.5 -0.1 20.0 21st 11.6 +0.1 6.2 19th 67.2 63.2 average 106%
Cressy Research Station 18.3 0.0 23.7 16th 4.7 -0.8 -1.4 29th 36.8 41.6 average 88%
Devonport Airport 18.2 +0.4 21.8 17th 8.6 -0.1 3.3 11th 31.0 59.0 low 53%
Launceston (Ti Tree Bend) 19.5 +0.5 25.4 16th 6.9 -0.6 1.5 10th 36.0 49.6 average 73%
Launceston Airport 18.0 -0.2 24.6 17th 5.6 -1.1 0.4 10th 30.6 41.0 average 75%
Low Head 17.6 -0.2 20.3 3rd 10.9 -0.3 6.8 10th 39.8 52.3 low 76%
Luncheon Hill (Forestry) 15.0 -0.7 21.7 16th 8.2 0.0 4.4 9th 86.4 96.9 average 89%
Marrawah 16.8 -0.1 21.7 16th 10.2 -0.1 5.5 19th 101.2 83.2 high 122%
Scottsdale (West Minstone Road) 18.0 0.0 23.8 17th 7.7 -0.3 2.6 10th 52.2 76.0 average 69%
Sheffield School Farm 16.1 -0.4 21.7 16th 6.8 -0.3 2.4 11th 26.0 63.5 low 41%
Smithton Aerodrome 17.6 -0.3 21.9 16th 8.1 +0.4 0.9 12th 71.2 58.5 high 122%
Wynyard Airport 17.7 +0.1 21.3 13th 7.7 +0.5 1.4 19th 54.4 70.2 average 77%
East Coast (district 92)
Fingal (Legge Street) 18.9 +0.5 25.4 17th 4.6 -0.8 -2.2 4th 15.4 50.6 low 30%
Friendly Beaches 19.8 +1.0 25.1 21st 9.6 -0.2 5.1 19th 10.8 44.2 low 24%
Lake Leake (Elizabeth River) 14.8 +0.5 23.4 17th 3.2 -1.0 -2.0 1st 40.9 67.6 average 61%
larapuna (Eddystone Point) 19.1 +1.2 23.1 3rd 11.7 +0.6 5.9 27th 21.6 64.2 low 34%
Maria Island (Point Lesueur) 17.9 +0.2 22.5 21st 11.2 -0.2 7.7 27th 25.4 32.4 average 78%
Orford (Aubin Court) 18.9 +0.5 25.2 17th 7.6 -0.8 3.4 12th 30.9 54.3 average 57%
St Helens Aerodrome 18.7 +0.1 22.0 6th 9.6 0.0 3.6 10th 22.0 51.0 low 43%
Swan Island 18.3 0.0 21.5 3rd 12.8 0.0 7.0 10th 16.6 45.0 low 37%
Swansea (Francis Street) 19.1   23.4 17th 7.7   2.9 4th 13.0
Southeast (district 94)
Campania (Kincora) 19.9 +0.8 29.8 17th 7.4 -0.1 1.6 4th 25.2 31.0 average 81%
Cape Bruny (Cape Bruny) 17.8 +1.2 27.7 17th 9.8 -0.2 5.2 27th 68.8 53.7 high 128%
Cape Bruny Lighthouse 17.3 +1.7 27.2 17th 10.2 +0.5 6.8 27th 80.0 78.7 average 102%
Dennes Point 18.3   25.1 17th 10.1   6.3 27th 31.6
Dover 18.3 +1.4 29.1 17th 6.5 -0.6 3.7 5th 65.8 66.1 average 100%
Dunalley (Stroud Point) 18.6   24.9 17th 10.5   7.4 9th 30.2
Grove (Research Station) 18.9 +1.0 28.3 17th 5.5 -0.3 -1.1 4th 43.2 44.2 average 98%
Hobart (Ellerslie Road) 19.6 +2.3 28.7 17th 9.0 0.0 5.4 19th 32.4 50.0 average 65%
Hobart Airport 19.7 +1.5 29.1 17th 8.7 -0.1 4.5 4th 19.2 40.0 average 48%
kunanyi (Mount Wellington Pinnacle) 10.0 +1.5 18.0 17th 2.0 -0.2 -2.9 27th 40.6 82.7 low 49%
Maatsuyker Island Lighthouse 15.6 +1.1 26.4 17th 10.0 +0.5 5.8 27th 79.4 107.6 low 74%
Melton Mowbray (North Stockman) 18.5 +1.0 26.7 21st 5.0 -0.9 -0.9 4th 30.6 27.6 average 111%
Tasman Island 15.8 +0.7 21.3 21st 10.1 +0.1 4.4 27th 72.0 62.6 average 115%
Tunnack Fire Station 16.4 +0.9 23.7 17th 4.8 -0.4 -3.3 4th 31.8 38.9 average 82%
Derwent Valley (district 95)
Bushy Park (Bushy Park Estates) 19.2 +1.2 27.6 17th 4.9 -1.2 -0.8 4th 48.8 45.5 average 107%
Maydena Post Office 16.9 +0.9 27.5 17th 4.4 -1.1 0.0 4th 111.0 78.5 high 141%
Ouse Fire Station 18.6 +0.2 27.1 17th 4.5 -0.5 -2.0 4th 38.0 30.9 average 123%
Central Plateau (district 96)
Butlers Gorge 13.7 +0.6 21.9 16th 2.9 -0.5 -2.4 4th 140.0 140.0 average 100%
Liawenee 12.7 +0.4 18.2 21st 1.2 -0.6 -7.3 4th 81.8 65.9 high 124%
West Coast (district 97)
Cape Sorell 16.9 +1.3 22.6 16th 11.0 +0.7 6.6 9th 112.2 107.4 average 104%
Hartz Mountain (Keoghs Pimple) 12.1 +1.0 22.2 16th 4.3 -0.3 -0.3 27th 84.0 69.3 high 121%
Low Rocky Point 16.9   28.5 16th 10.2   6.9 19th
Mount Read 8.6 -0.3 16.9 16th 2.9 -0.5 -1.4 27th 390.4 280.8 high 139%
Scotts Peak Dam 15.8 +1.0 26.0 17th 6.6 -0.2 2.7 27th 177.0 126.2 v high 140%
Strahan Aerodrome 17.8 +1.0 26.6 16th 9.0 +0.5 2.1 4th 103.8 114.0 average 91%
Warra 14.2 +0.6 25.0 17th 5.9 +0.1 0.4 4th 96.2 120.7 average 80%
King Island (district 98)
King Island Airport 18.2 +0.4 26.7 16th 9.8 -0.8 2.1 4th 40.4 55.8 low 72%
Flinders Island (district 99)
Flinders Island Airport 19.0 +0.2 24.2 21st 11.5 +0.8 3.2 19th 26.4 57.3 low 46%
Hogan Island 18.3 -0.1 23.1 17th 13.0 -0.1 6.8 27th 31.6 48.6 average 65%
Note: From 2017, information about Macquarie Island can be found in the climate summary for the Remote Islands and Antarctica

Notes

The Monthly climate summary, generally published on the first working day of each month, lists 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. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This statement has been prepared based on information available at 9 am on Wednesday 1 May 2019. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites 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 decile ranking (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.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

Media
(03) 9669 4057
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