Monday, 3 September 2007 - Seasonal Climate Summary for Tasmania - Product code IDCKGC27R0

Tasmania in winter 2007: Mostly drier and cooler than average


Summary

It was another relatively dry winter in Tasmania, despite some flooding rain during August. Although there were some warm days and nights, temperatures were mostly below the winter averages overall.

More detailed summaries have been prepared for each individual month of winter: June, July and August. A summary of the record dry winter 2006 was issued as a media release.

Details

Dry in most areas: Despite some flooding rain in August, rainfall was below the winter average in most areas. Both June and July were generally drier than average, and record dry in some spots. Most of the state, and especially the northwestern half, was drier than average for winter. Although rain was close to normal in the south and on the East Coast, only in the far southeast — on the Tasman Peninsula and south Bruny Island — was it a wetter-than-average winter.

Some mild days, but many more cold ones: Maximum (daytime) temperatures were generally below average for winter, typically by about 0.2 to 0.5°C, although they were a fraction above the winter average on the Bass Strait islands and patches of the northeast and northwest coasts. It was mostly cold from the start of June until the end of July, and for much of August. The last few days of winter did see some temperatures in the low 20s in the south and east. 

Many frosty nights, but some mild ones: Along with the cold days, there were also plenty of cold nights, especially in June and again in mid-August. Eddystone Point registered its lowest winter temperature on record. However, there were also several relatively mild nights through July and August, and Geeveston had its warmest-ever winter night. Taken across winter, minimum (overnight) temperatures were mostly below average by about half a degree. The main exception was the northern East Coast, which escaped the coldest of the nights and ended up about half a degree above average. The average minimum at Wynyard was a record low for winter.

Further information

Ian Barnes-Keoghan
Tasmania and Antarctica Climate Services Centre
Bureau of Meteorology
Phone (03) 6221 2043
Email climate.tas@bom.gov.au

Extremes


Hottest day
Highest temperature
22.6°C at Campania (Kincora) on 30 Aug
Warmest days on average
Highest mean daily maximum temperature
14.4°C at Scamander
Coolest days on average
Lowest mean daily maximum temperature
2.9°C at Mount Wellington
Coldest day
Lowest daily maximum temperature
−2.2°C at Mount Wellington on 18 Jun
Coldest night
Lowest temperature
−8.8°C at Liawenee on 18 Jun
Coolest nights on average
Lowest mean daily minimum temperature
−2.0°C at Liawenee
Warmest nights on average
Highest mean daily minimum temperature
9.2°C at Hogan Island
Warmest night
Highest daily minimum temperature
14.0°C at Friendly Beaches on 10 Aug
Wettest overall
Highest total rainfall
715.6 mm at Lake Margaret Power Station
Driest overall
Lowest total rainfall
41.4 mm at Tunbridge (Austin-Vale)
Wettest day
Highest daily rainfall
110.8 mm at Strathgordon Village on 10 Aug
Highest wind gust
156 km/h at Mount Read on 9 Aug

Records



Record lowest winter temperature
Lowest temperature
in winter 2007 (°C)
Previous lowest
for winter
Years of
record
Normal for
winter
Eddystone Point −0.4 on 22 Jun 0.0 on 10 Jul 1997 50 7.4



Record highest winter daily minimum temperature
Highest daily minimum
temperature
in winter 2007 (°C)
Previous highest
for winter
Years of
record
Normal for
winter
Macquarie Island 6.8 on 16 Jun 6.7 on 29 Jun 1965 60 1.6
Geeveston (Cemetery Road) 12.3 on 30 Aug 12.1 on 3 Aug 2005 21 2.5


Record lowest winter mean daily minimum temperature
Mean daily minimum
temperature
for winter 2007 (°C)
Previous lowest
for winter
Years of
record
Normal for
winter
Wynyard Airport 2.2 2.5 in 1997 21 3.9





Summaries

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 winter 2007
Maximum temperatures
for winter
(°C)
Minimum temperatures
for winter
(°C)
Rainfall
for winter
(millimetres)
Mean for
winter
2007
Diff
from
normal
Highest for
winter
2007
Mean for
winter
2007
Diff
from
normal
Lowest for
winter
2007
Total for
winter
2007
Normal
for
winter
Rank of
winter
2007
Fraction of
winter
normal
Northern (district 91)
Bridport 13.3 −0.4 16.0 25 Jul 5.4 −0.4 −0.5 22 Jun 183.9 241.5 low 76%
Burnie 13.2 +0.2 17.0 30 Aug 6.4 +0.3 2.2 18 Jun 197.0 339.7 very low 58%
Cape Grim BAPS 12.3 −0.4 18.3 30 Aug 7.6 −0.9 3.0 14 Aug 370.2 268.2 high 138%
Cressy Research Station 12.0 16.6 25 Aug 1.2 −5.2 20 Jun 108.6
Devonport Airport 12.8 −0.3 16.4 17 Aug 4.1 −0.9 −1.8 20 Jun 146.1 265.1 very low 55%
Launceston 12.8 −0.3 17.7 28 Aug 2.6 −0.3 −4.1 22 Jun 165.0 226.3 low 73%
Launceston Airport 12.0 17.2 25 Aug 2.2 −4.0 20 Jun 114.6
Launceston Airport Comparison 11.4 −0.1 16.6 25 Aug 2.4 −0.3 −4.1 22 Jun 128.4 214.9 low 60%
Low Head 12.7 −0.4 15.8 30 Aug 6.4 −0.9 1.0 22 Jun 135.4 213.4 low 63%
Luncheon Hill 10.9 −0.1 16.6 24 Aug 4.3 −0.9 −1.0 19 Jun 403.0 533.5 low 76%
Marrawah 12.5 −0.1 17.4 30 Aug 6.5 −0.5 1.8 18 Jun 294.6 390.4 low 75%
Powranna 11.6 −0.4 16.7 25 Aug 2.1 −0.3 −4.0 18 Jun 117.9 159.0 low 74%
Scottsdale 12.1 −0.3 15.4 27 Aug 3.9 0 −1.7 22 Jun 237.4 345.2 very low 69%
Sheffield School Farm 11.0 −0.4 15.2 29 Aug 2.6 −1.2 −3.6 18 Jun 220.2
Smithton Aerodrome 13.1 −0.4 17.9 30 Aug 3.4 −1.7 −2.8 18 Jun 280.8 318.5 normal 88%
Wynyard Airport 13.0 +0.1 17.2 29 Aug 2.2 −1.6 −3.5 18 Jun 286.0 352.1 low 81%
East Coast (district 92)
Eddystone Point 14.1 +0.7 18.9 27 Aug 7.7 +0.4 −0.4 22 Jun 214.4 223.1 normal 96%
Fingal 11.9 −0.9 18.6 31 Aug 1.1 +0.3 −4.5 23 Jun 137.6 179.2 normal 77%
Friendly Beaches 13.7 −0.6 22.1 27 Aug 6.1 0 0.9 24 Jun 197.2
Lake Leake 8.6 −0.4 15.2 27 Aug 0.3 −0.2 −6.9 18 Jun 142.2 242.0 low 59%
Maria Island 12.8 19.4 28 Aug 7.3 4.0 20 Jun 102.0
Orford 12.8 −0.6 20.5 27 Aug 3.8 −0.2 −1.2 25 Jun 127.6 170.3 normal 75%
Scamander 14.4 +0.1 22.0 27 Aug 5.6 +0.6 −0.3 4 Aug 178.4 165.1 normal 108%
St Helens Aerodrome 13.5 20.0 27 Aug 5.2 −1.0 22 Jun 197.2
Swan Island 13.2 17.9 30 Aug 8.3 3.8 20 Jun 212.6
Swansea Post Office 13.8 0 22.2 27 Aug 4.3 +0.1 −1.5 18 Jun 115.1 149.0 normal 77%
Midlands (district 93)
Ross 11.5 −0.3 16.7 28 Aug 1.2 −0.6 −6.0 18 Jun 79.4 123.2 low 64%
Southeast (district 94)
Bull Bay 12.1 −0.7 21.5 30 Aug 4.9 −1.2 1.4 13 Aug 159.0 157.3 normal 101%
Campania 12.9 22.6 30 Aug 3.1 −2.8 18 Jun 106.6
Cape Bruny 12.0 −0.4 20.4 30 Aug 6.4 −0.4 2.4 14 Aug 324.8 234.9 very high 138%
Cape Bruny Lighthouse 11.7 +0.1 20.0 30 Aug 6.5 +0.1 1.8 4 Aug 401.4 278.2 very high 144%
Dover 12.2 −0.4 21.0 30 Aug 3.1 −0.8 −1.8 18 Jun 238.8 253.2 normal 94%
Geeveston 12.0 −0.4 20.7 30 Aug 1.8 −0.6 −3.9 14 Aug 276.0 262.2 normal 105%
Grove 11.9 −0.5 22.0 30 Aug 1.8 −0.6 −4.8 18 Jun 155.6 209.9 low 74%
Grove 11.7 21.7 30 Aug 1.2 −5.0 18 Jun 153.6
Hobart 12.0 −0.1 21.7 30 Aug 4.7 −0.3 −0.4 18 Jun 125.4 159.4 normal 79%
Hobart Airport 12.8 −0.1 22.1 30 Aug 4.3 −0.1 −0.7 18 Jun 93.4 121.2 normal 77%
Maatsuyker Island Lighthouse 10.9 −0.3 17.8 30 Aug 7.0 +0.3 3.1 21 Jun 332.4 372.2 normal 89%
Melton Mowbray 11.1 −1.0 20.2 30 Aug 1.6 −0.7 −6.4 18 Jun 134.6 110.9 normal 121%
Mount Wellington 2.9 +0.1 11.5 30 Aug −1.4 0 −5.6 18 Jun 207.8 219.7 normal 95%
Tasman Island 10.7 16.6 27 Aug 6.3 1.2 18 Jun 313.6
Tunnack Fire Station 9.3 −0.8 15.5 29 Aug 1.1 −1.0 −6.3 18 Jun 139.4 151.8 normal 92%
Derwent Valley (district 95)
Bushy Park 12.2 +0.4 22.3 30 Aug 0.6 −1.4 −6.0 18 Jun 101.6 151.0 low 67%
Maydena Post Office 10.5 −0.8 19.5 30 Aug 1.4 −1.0 −3.5 18 Jun 283.6 359.7 low 79%
Moogara 8.7 −0.3 18.0 30 Aug 2.1 −0.2 −1.5 24 Jun 173.8 245.2 low 71%
Ouse Fire Station 11.8 21.8 27 Aug 0.4 −6.1 18 Jun 124.6
Tarraleah Village 8.4 −0.5 17.9 27 Aug 0.3 −0.2 −4.9 18 Jun 280.1 341.0 normal 82%
Central Plateau (district 96)
Lake St Clair National Park 7.3 −0.4 16.4 27 Aug −0.6 −0.7 −5.5 18 Jun 489.2 616.5 low 79%
Liawenee 5.9 15.0 27 Aug −2.0 −8.8 18 Jun 245.2
West Coast (district 97)
Hartz Mountain 6.0 −0.6 14.0 30 Aug 1.0 −0.8 −3.0 21 Jun 293.8
Mount Read 3.7 −0.5 11.9 27 Aug −0.3 −0.7 −5.2 21 Jun 656.8
Scotts Peak Dam 9.3 18.3 27 Aug 2.9 −1.5 10 Jul 518.2
Strahan Aerodrome 12.2 −0.5 20.5 27 Aug 4.3 −1.3 −1.8 15 Jul 458.8 501.5 normal 91%
Strathgordon Village 9.2 −0.3 18.0 27 Aug 2.6 −0.8 −1.5 19 Jun 698.4 774.4 normal 90%
Warra 8.4 16.8 30 Aug 2.2 −2.5 22 Aug 428.6
King Island (district 98)
King Island Airport 13.7 +0.2 21.4 27 Aug 7.4 −0.4 0.5 21 Jul 264.4 320.3 low 83%
Flinders Island (district 99)
Flinders Island Airport 13.8 +0.1 21.8 30 Aug 6.4 −0.2 −0.3 15 Jul 185.8 232.7 low 80%
Hogan Island 13.1 20.0 30 Aug 9.2 5.6 13 Aug 197.2
Macquarie Island (district 300)
Macquarie Island 4.6 −0.4 7.6 16 Jun 1.1 −0.5 −6.4 5 Jul 214.4 220.3 normal 97%

Notes

This statement has been prepared based on information available at 11 am on Monday 3 September 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 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of "normal" 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, normal in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of normal shows how much rain has fallen this time as a percentage of the long-term mean.

Further information

Ian Barnes-Keoghan
Tasmania and Antarctica Climate Services Centre
Bureau of Meteorology
Phone (03) 6221 2043
Email climate.tas@bom.gov.au