Friday, 1 December 2006 - Monthly Climate Summary for Tasmania - Product code IDCKGC17R0

Tasmania in November 2006:
Another dry month, with extremes of temperature

Summary

A cold outbreak brought snow to low levels in the middle of the November, but yielded only small amounts of precipitation, ensuring that the month was again much drier than normal in most areas - although without the record-breaking figures of recent months. Daytime temperatures were well down on normal in the south, apart from a warm burst on the last day. Several damaging frosts occurred, with overnight temperatures below normal across the state.

Details

Another dry month: The repeated southerlies meant that a patch of the southeast and parts of King Island had near-normal rain for the month, but these were very much the exception. Although only a handful of sites in the north had their lowest total November rainfall on record, (and a few more had their lowest for at least 20 years), much of the north and east was once again much drier than normal. The highest rainfall for the whole month was 158.6 mm at Mount Read, well down on what would be expected for November.

Cold outbreak brings snow: From the 5th to the 16th, daytime temperatures were mostly below normal. A surge of cold air from the far south pushed rapidly over Tasmania - and the rest of eastern Australia - on the 15th. In Hobart the temperature struggled to reach double digits, then plummeted below 4°C in a shower of hail in the afternoon. Mount Wellington did not get above −1.3°C on the 15th, and Mount Read did not get warmer than −1.1°C; these are the second- and third-coldest November maximum temperatures ever recorded in Tasmania. The especially cold air made its mark on Macquarie Island several days earlier, when it had its coldest-ever November temperature on the 12th.

A few hot days: The first few days, and from the 17th on, were mostly warmer than normal. The 21st was especially warm for all but the east coast, and  a number of sites in the north and Midlands topped 29°C. The last few days of the month were also quite warm, with temperatures in the high 20s at some centres. In all but the central north the cold days dominated the warm ones, so temperatures averaged across the month were below normal, typically by 0.5 to 1.5°C. In the central north, average daytime temperatures were 0.5 to 1°C above normal.

Late-season frosts: Cold nights were very much to the fore during November, especially around the 9th, 15th and 25th. Periods of light winds and clear skies following cold days provided perfect conditions for frost to occur. Coming so late in the year, these caused enormous damage to fruit and other crops. Average overnight temperatures were below normal across the state, typically by between 0.5 and 1.5°C.
Some sites in the east had their lowest November temperature on record, generally on the 15th or the 16th. Bicheno and Scamander had their lowest November mean daily minimum temperature on record.

A separate summary has also been prepared for all of spring.

Further information

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

Extremes

Hottest day
Highest temperature
30.1°C at Ross  on the 21st
Warmest days on average
Highest mean daily maximum temperature
21.2°C at Cressy Research Station
Coolest days on average
Lowest mean daily maximum temperature
8.6°C at Mount Wellington
Coldest day
Lowest daily maximum temperature
−1.3°C at Mount Wellington on the 15th
Coldest night
Lowest temperature
−5.4°C at Mount Wellington on the 15th
Coolest nights on average
Lowest mean daily minimum temperature
0.2°C at Mount Wellington
Warmest nights on average
Highest mean daily minimum temperature
10.8°C at Hogan Island
Warmest night
Highest daily minimum temperature
15.5°C at Flinders Island Airport on the 21st
Wettest overall
Highest total rainfall
158.6 mm at Mount Read
Driest overall
Lowest total rainfall
8.8 mm at Cressy Research Station
Wettest day
Highest daily rainfall
31.0 mm at Lake St Clair on the 15th
Highest wind gust
137 km/h at Mount Wellington on the 23rd

Records

Record lowest total November rainfall

Total rainfall
for November 2006 (mm)
Previous lowest
for November
Normal for
November
Years of
record
Devonport Airport 10.6 17.4 in 2003 56.8 44
Barrington Post Office 14.8 19.6 in 2003 79.3 40
Forthside Research Station 13.4 21.6 in 2003 73.1 39
Campbell Town (Elizabeth R) 18.6 19.5 in 1967 54.1 20

Lowest total November rainfall for at least 20 years

Total rainfall
for November 2006 (mm)
Most recent lower
for November
Normal for
November
Years of
record
Lilydale Post Office 17.2 16.0 in 1925 62.6 77
Ulverstone (Knights Road) 13.8 11.9 in 1942 65.8 62
Oatlands Post Office 12.4 10.4 in 1966 50.6 38
Flinders Island Airport 16.8 15.0 in 1982 54.9 23
Lake Leake (Elizabeth River) 25.8 21.5 in 1982 63.8 23
Westbury (Birralee Road) 14.0 12.0 in 1986 54.8 20


Record lowest November mean daily maximum temperature

Mean daily maximum
temperature
for November 2006 (°C)
Previous lowest
for November
Normal for
November
Years of
record
Macquarie Island 5.1  5.2 in 1997 6.6 58

Lowest November mean daily maximum temperature for at least 20 years

Mean daily maximum
temperature
for November 2006 (°C)
Most recent lower
for November
Normal for
November
Years of
record
Cape Bruny Lighthouse 14.5 14.1 in 1960 15.5 46



Record lowest November mean daily minimum temperature

Mean daily minimum
temperature
for November 2006 (°C)
Previous lowest
for November
Normal for
November
Years of
record
Bicheno (Council Depot) 8.1 8.3 in 1965 10.0 32
Tarraleah Village 3.0 = 3.0 in 1996 4.7 22
Scamander 8.9 9.0 in 1977 10.2 21

Lowest November mean daily minimum temperature for at least 20 years

Mean daily minimum
temperature
for November 2006 (°C)
Most recent lower
for November
Normal for
November
Years of
record
Macquarie Island 1.3 1.1 in 1982 2.8 24


Record lowest November temperature

Lowest temperature
in November 2006 (°C)
Previous lowest
for November
Normal for
November
Years of
record
Cape Bruny Lighthouse 2.1 on the 16th 2.5 on the 13th in 1972 9.0 83
Macquarie Island −3.6 on the 12th −3.3 on the 7th in 1976 2.8 58
Flinders Island Airport 0.5 on the 16th 0.7 on the 4th in 1980 10.1 43
Bicheno (Council Depot) 1.2 on the 15th 2.8 on the 8th in 1999 10.0 32
Fingal (Legge Street) −1.7 on the 15th −1.6 on the 9th in 1994 7.0 21
Scamander 1.8 on the 15th 3.0 on the 6th in 1977 10.2 21



Summaries

 In the following table, certain key sites have been highlighted to make them easier to identify.


Summary statistics for November 2006

Maximum temperatures
for November
(°C)
Minimum temperatures
for November
(°C)
Rainfall
for November
(millimetres)
Mean for
November
2006
Diff
from
normal
Highest for
November
2006
Mean for
November
2006
Diff
from
normal
Lowest for
November
2006
Total for
November
2006
Normal
for
November
Rank of
November
2006
Fraction of
November
normal
Northern (district 91)
Bridport 18.0 −0.1 23.0 22nd 8.6 −1.1 2.4 15th 16.9 50.1 lowest 34%
Burnie 18.8 +1.1 25.0 28th 10.1 +0.5 3.1 15th 22.5 68.9 very low 33%
Cape Grim BAPS 14.4 −1.4 19.5 21st 9.4 −1.1 5.5 15th 24.2 51.8 low 47%
Cressy Research Station 21.2
29.1 21st 5.2
−1.5 15th 8.8


Devonport Airport 18.2 +0.8 23.1 25th 8.5 −0.2 1.1 16th 10.6 56.8 lowest 19%
Launceston 20.6 +0.4 29.0 21st 7.7 −1.1 0.8 15th 14.8 48.9 very low 30%
Launceston Airport 20.3
29.3 21st 5.6
−1.3 16th 18.4


Launceston Airport Comparison 19.8 +1.1 28.9 21st 5.9 −1.2 −2.0 15th 20.8 49.9 low 42%
Low Head 16.8
21.1 21st 10.6
5.4 16th 10.2 37.0 low 28%
Luncheon Hill 16.4 −0.6 26.0 21st 6.3 −1.1 1.0 15th 55.6 92.2 low 60%
Marrawah 15.8 −0.7 21.5 21st 8.3 −0.8 4.2 15th 29.8 69.7 very low 43%
Powranna 19.9 +0.4 29.4 21st 5.8 −1.1 −1.9 16th 21.6 52.4 very low 41%
Scottsdale 18.6 −0.1 26.4 21st 6.6 −1.1 0.0 15th 20.2 70.1 very low 29%
Sheffield School Farm 18.6 +0.9 25.9 21st 6.8 −0.6 1.2 15th 11.2


Smithton Aerodrome 17.8 −0.3 22.8 27th 7.3 −1.3 0.2 10th 25.8 53.4 low 48%
Wynyard Airport 19.3 +1.9 26.5 28th 7.1 −0.8 0.0 16th 21.0 75.5 very low 28%
East Coast (district 92)
Bicheno 18.9 +0.6 24.4 23rd 8.1 −1.9 1.2 15th 20.4 57.1 low 36%
Eddystone Point 18.4 +0.7 21.0 28th 9.9 −0.8 3.7 8th 27.0 58.8 low 46%
Fingal 19.5 +0.2 27.0 24th 5.4 −1.6 −1.7 15th 22.2 44.4 low 50%
Friendly Beaches 18.9 −0.7 24.7 22nd 8.8 −1.3 3.7 15th 28.8


Lake Leake 15.2 −0.3 23.1 27th 3.8 −1.5 −2.1 26th 25.8 63.8 low 40%
Maria Island 17.2
23.0 3rd 9.4
4.8 15th 16.2


Orford 17.4 −1.3 23.6 3rd 8.2 −0.9 3.2 30th 27.8 65.4 low 43%
Scamander 18.2 −0.7 25.4 3rd 8.9 −1.3 1.8 15th 16.4 61.4 low 27%
St Helens Aerodrome 18.8
27.8 27th 8.5
1.9 15th 25.2


Swan Island 16.8
19.6 25th 10.7
4.6 16th 21.0


Swansea Post Office 18.4 −0.7 25.5 3rd 8.1 −0.8 2.7 26th 18.5 51.4 low 36%
Midlands (district 93)
Ross 20.2 +0.6 30.1 21st 5.0 −1.6 −1.6 9th 23.0 43.8 low 53%
Southeast (district 94)
Bull Bay 16.7 −1.1 22.0 24th 7.6 −1.7 3.2 16th 43.2 50.7 normal 85%
Campania 19.7
26.0 27th 7.5
1.1 30th 21.0


Cape Bruny 15.3 −1.3 21.3 21st 8.2 −1.4 2.3 16th 56.6


Cape Bruny Lighthouse 14.5 −1.1 20.1 21st 8.2 −0.8 2.1 16th 68.8 75.8 normal 91%
Dover 15.8 −1.7 21.5 21st 7.0 −0.8 1.4 5th 54.6 72.4 low 75%
Geeveston 16.9 −1.3 24.7 21st 7.1 −0.3 0.2 5th 49.2 71.2 low 69%
Grove 17.7 −0.8 25.4 21st 5.9 −1.1 −0.4 30th 34.6 67.0 low 52%
Grove 17.7
25.1 21st 5.4
−1.2 30th 36.4


Hobart 17.4 −1.3 24.7 30th 8.5 −0.7 3.8 16th 27.0 54.1 low 50%
Hobart Airport 18.2 −0.7 25.4 30th 8.3 −0.8 2.8 15th 18.4 43.6 low 42%
Maatsuyker Island Lighthouse 12.7 −1.7 21.9 30th 7.7 −0.7 3.3 15th 58.4 92.7 low 63%
Melton Mowbray 19.3 −0.4 28.1 21st 6.6 −0.7 0.8 30th 16.0 36.5 low 44%
Mount Wellington 10.2 +1.3 56.0 30th 0.2 −1.2 −5.4 15th 52.6 81.2 low 65%
Tasman Island 13.3
20.1 3rd 7.4
1.9 15th 34.0


Tunnack Fire Station 17.0 −0.1 25.5 28th 4.7 −1.2 −3.2 30th 22.4 49.5 low 45%
Derwent Valley (district 95)
Bushy Park 20.3 +0.5 29.3 21st 6.5 −1.0 0.5 15th 12.4 53.4 very low 23%
Maydena Post Office 15.9 −1.9 26.8 21st 5.5 −0.7 −0.8 30th 45.8 95.9 low 48%
Moogara 14.5 −1.0 24.0 21st 4.6 −0.8 −0.7 15th 39.2 71.8 low 55%
Ouse Fire Station 20.3
28.2 21st 6.1
−1.2 30th 13.0


Tarraleah Village 15.4 −0.8 25.2 21st 3.0 −1.7 −1.9 15th 45.8 98.5 very low 46%
Central Plateau (district 96)
Lake St Clair National Park 14.7 −0.4 26.7 21st 2.3 −1.1 −3.5 10th 76.0 143.8 low 53%
Liawenee 14.4
26.8 21st 1.1
−3.9 15th 27.0


West Coast (district 97)
Hartz Mountain 11.4 −2.4 23.7 21st 2.3 −2.0 −2.3 15th 81.4


Mount Read 9.2 −1.4 20.8 21st 1.6 −1.4 −4.0 16th 158.8


Scotts Peak Dam 15.0
28.2 21st 5.1
0.1 15th 78.4


Strahan Aerodrome 16.2 −1.6 26.7 30th 7.1 −1.1 2.6 15th 52.0 94.8 low 55%
Strathgordon Village 14.0 −1.8 25.5 21st 5.1 −1.7 0.6 15th 113.8 182.9 low 62%
Warra 13.6
23.4 21st 4.4
−0.4 5th 107.6


King Island (district 98)
King Island Airport 15.9 −1.2 22.1 30th 8.2 −1.8 1.3 1st 25.4 57.3 low 44%
Flinders Island (district 99)
Flinders Island Airport 18.1 −0.2 25.2 21st 8.5 −1.7 0.5 16th 16.8 54.9 very low 31%
Hogan Island 17.1
25.2 21st 10.8
5.2 15th 25.8



Notes

This statement has been prepared based on information available at noon on Friday 1 December 2006. 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 averages 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 Rank indicates about where rainfall this time ranks in the climate record for the site.

Further information

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