Monday, 3 December 2007 - Monthly Climate Summary for Tasmania - Product code IDCKGC17R0

Tasmania in November 2007: record dry and record warm

Summary

November 2007 was among the driest and warmest November on record for many parts of Tasmania, with a distinct shortage of rain-bearing systems and several very warm days.

A separate summary that covers all of spring 2007 has also been prepared. It is intended that the summaries for December and all of 2007 will be published on Wednesday 3 January 2008.

Details

Record dry:  Many sites across the state registered their driest November on record, or their driest for several decades. At several others (including Hobart) only 2003 had a drier November. The rainfall averaged over the whole state was the lowest for any November on record, mostly because of the very low totals received in the normally wet west. Monthly totals in the western highlands were commonly around 20 mm, in stark contrast to the more than 400 mm those areas received in October. Monthly totals of less than 10 mm were common through much of the Midlands, the southeast and the Derwent Valley. The main rainfall event during the month was the passage of a trough on the 20th, which triggered thunderstorms in many areas but still brought only a few millimetres to most areas.

Record warm days: Most days were warmer than normal, with the main exception during a burst of cold southerly winds from the 4th to the 8th. There were several very warm days, especially in the south and east, with some temperatures in the low 30s reported on the 16th, 19th and 20th. Several sites (including Launceston and Burnie) had their highest November mean daily maximum temperature on record, whilst for several others (including Hobart) it was the warmest since at least 1982. Means for the month were typically 2 to 3 degrees above the long-term averages, and when averaged across the state were the highest for November on record.

Very mild nights: Although minimum (overnight) temperatures were not record-breaking, they were still above average. There were some cold mornings, notably the 1st and the 5th, but these were more than offset by several mild nights in the second half of the month. Means for the month were mostly about a degree above the long-term averages, but were generally not as extreme as those from 2000, 2005 or 1975.

Few westerlies: High pressures systems controlled Tasmania's weather for most of the month, quite unlike the front-dominated October. Another result of this - apart from the dry west coast - was the small number of especially windy days; the windiest was the 20th when hot northerlies affected most of the state.

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
34.5°C at Swansea Post Office on the 20th
Warmest days on average
Highest mean daily maximum temperature
23.6°C at Cressy Research Station and Ouse Fire Station
Coolest days on average
Lowest mean daily maximum temperature
12.2°C at Mount Wellington
Coldest day
Lowest daily maximum temperature
1.0°C at Mount Wellington on the 4th
Coldest night
Lowest temperature
−2.8 °C at Mount Wellington on the 5th
Coolest nights on average
Lowest mean daily minimum temperature
3.2°C at Mount Wellington
Warmest nights on average
Highest mean daily minimum temperature
12.6°C at Hogan Island and Swan Island
Warmest night
Highest daily minimum temperature
19.6°C at Flinders Island Airport on the 20th
Wettest overall
Highest total rainfall
50.2 mm at Hogan Island
Driest overall
Lowest total rainfall
1.6 mm at Bothwell (Clyde River)
Wettest day
Highest daily rainfall
23.8 mm at Lake Margaret Power Station on the 21st
Highest wind gust
117 km/h at Hogan Island on the 4th

Records


Record lowest total November rainfall
Total rainfall
for November 2007 (mm)
Previous lowest
for November
Years of
record
Normal for
November
Cape Bruny Lighthouse 9.6 21.6 in 2000 137 75.3
Oatlands Post Office 5.6 6.9 in 1900 121 50.3
Maatsuyker Island Lighthouse 11.0 18.4 in 2000 116 92.0
Premaydena Hatchery 8.4 11.0 in 1937 101 60.2
Bothwell (Cluny) 3.0 3.8 in 1919 93 50.4
Cape Sorell 10.4 = 10.4 in 2000 85 88.6
Bagdad Post Office 1.8 3.8 in 1989 82 53.4
Waddamana Field Study Centre 9.8 21.8 in 1989 80 70.6
City of Melbourne Bay 12.4 17.1 in 1959 74 69.5
Tarraleah Village 8.8 19.2 in 2003 72 97.2
Dover 7.4 9.4 in 2003 71 71.5
Lake Margaret Power Station 38.8 73.9 in 2000 63 223.5
Hastings Chalet 10.3 17.0 in 1989 62 111.4
Glenorchy (Glenorchy Reservoir) 4.4 6.6 in 2003 58 66.5
Woodbridge 7.4 14.0 in 2003 57 75.3
Taroona (Taroona Crescent) 3.8 4.0 in 2003 45 55.8
Savage River Mine 26.0 47.8 in 1988 40 130.8
Strathgordon Village 25.5 47.0 in 2000 40 179.1
Copping 15.0 19.4 in 1982 38 68.8
Zeehan (West Coast Pioneers Museum) 22.2 30.0 in 2000 38 154.6
Marrawah 15.8 18.0 in 2003 37 68.2
Blackmans Bay Treatment Plant 4.0 5.6 in 2003 26 47.8
Bull Bay (Lauriston) 8.6 = 8.6 in 2003 25 49.0
Nugent (Twilight Valley) 17.2 19.4 in 2003 24 65.9
Campbell Town (Elizabeth R) 18.2 18.6 in 2006 21 52.3
Cape Grim BAPS 10.4 16.0 in 2003 20 49.8


Lowest total November rainfall for at least 20 years
Total rainfall
for November 2007 (mm)
Most recent lower
for November
Years since
lower
Normal for
November
Naracoopa 13.4 7.6 in 1918 87 66.5
Lake Leake (Elizabeth River) 21.4 20.0 in 1979 27 63.4
Pioneer (Main Road) 20.0 18.9 in 1982 25 66.7
Swansea Post Office 13.8 4.6 in 1982 25 51.1
Gray (Craigie-Lea) 15.6 10.0 in 1982 23 114.2
Memana (Babel Farm) 23.7 13.2 in 1982 23 59.2



Record highest November mean daily maximum temperature
Mean daily maximum
temperature
for November 2007 (°C)
Previous highest
for November
Years of
record
Normal for
November
Launceston Airport Comparison 21.8 21.3 in 1982 69 18.7
Burnie (Round Hill) 20.0 19.8 in 1982 59 17.7
Grove (Comparison) 20.9 20.8 in 1982 52 18.5
Launceston (Ti Tree Bend) 22.5 22.2 in 2000 25 20.3
Mount Wellington 12.2 12.1 in 2000 24 8.9
Fingal (Legge Street) 21.5 21.4 in 1997 22 19.3
Geeveston (Cemetery Road) 20.0 = 20.0 in 2000 22 18.1
Wynyard Airport 19.7 19.6 in 2000 21 17.6


Highest November mean daily maximum temperature for at least 20 years
Mean daily maximum
temperature
for November 2007 (°C)
Most recent higher
for November
Years since
higher
Normal for
November
Bushy Park (Bushy Park Estates) 23.3 23.4 in 1937 65 19.7
Eddystone Point 19.4 19.4 in 1982 25 17.7
Hobart (Ellerslie Road) 20.6 21.3 in 1982 25 18.6
Hobart Airport 20.9 22.3 in 1982 25 18.9


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 November 2007
Maximum temperatures
for November
(°C)
Minimum temperatures
for November
(°C)
Rainfall
for November
(millimetres)
Mean for
November
2007
Diff
from
normal
Highest for
November
2007
Mean for
November
2007
Diff
from
normal
Lowest for
November
2007
Total for
November
2007
Normal
for
November
Rank of
November
2007
Fraction of
November
normal
Northern (district 91)
Bridport 19.1 +0.9 27.3 20th 10.7 +1.0 4.3 5th 14.2 47.3 very low 30%
Burnie 20.0 +2.4 27.3 12th 12.0 +2.4 8.8 5th 19.0 68.0 very low 28%
Cape Grim BAPS 17.4 +1.7 22.4 17th 11.4 +0.9 8.2 6th 10.4 49.8 lowest 21%
Cressy Research Station 23.6   31.3 20th 7.5   −0.7 1st 18.2
Devonport Airport 19.1 +1.7 25.7 20th 10.1 +1.3 3.3 1st 11.2 55.8 very low 20%
Launceston 22.5 +2.2 30.4 20th 10.8 +2.1 3.6 1st 19.6 47.9 very low 41%
Launceston Airport 22.2   31.9 20th 8.9   2.6 5th 26.6
Launceston Airport Comparison 21.8 +3.0 30.8 20th 8.9 +1.8 1.6 1st 34.6 49.7 low 70%
Low Head 18.2 +1.0 23.1 20th 11.9 +0.8 7.5 5th 14.2 35.1 low 40%
Luncheon Hill 19.5 +2.6 27.4 16th 8.8 +1.5 4.9 3rd 21.0 86.7 very low 24%
Marrawah 18.3 +1.8 22.8 20th 10.1 +1.0 6.0 1st 15.8 68.2 lowest 23%
Powranna 22.9 +3.4 32.0 20th 9.1 +2.4 1.2 1st 21.4 50.6 very low 42%
Scottsdale 20.2 +1.5 30.5 20th 8.7 +1.1 1.8 5th 25.8 68.9 very low 37%
Sheffield School Farm 19.7 +1.9 26.7 20th 8.3 +1.0 2.1 1st 21.8
Smithton Aerodrome 19.9 +1.8 26.7 17th 9.9 +1.5 2.0 1st 7.6 49.2 very low 15%
Wynyard Airport 19.7 +2.1 27.2 20th 9.5 +1.7 2.7 1st 23.2 74.1 very low 31%
East Coast (district 92)
Bicheno 19.2 +0.9 25.2 20th 11.3 +1.4 7.1 10th 19.0 56.7 low 34%
Eddystone Point 19.4 +1.7 29.6 19th 12.2 +1.5 8.4 5th 30.4 58.5 low 52%
Fingal 21.5 +2.1 33.9 20th 8.1 +1.1 0.2 1st 21.2 44.3 low 48%
Friendly Beaches 20.4 +0.9 27.8 20th 10.8 +0.9 6.9 5th 16.0 57.3 very low 28%
Lake Leake 17.4 +2.0 30.8 20th 6.2 +1.1 0.2 1st 21.4 63.4 very low 34%
Maria Island 19.1   26.4 19th 11.4   8.3 5th 7.0
Orford 19.4 +0.8 29.0 20th 9.4 +0.4 4.8 1st 11.0 64.4 very low 17%
Scamander 20.1 +1.2 33.0 20th     7.2 1st 28.0 59.9 low 47%
St Helens Aerodrome 20.4   31.7 19th 11.0   6.0 1st 23.8
Swan Island 17.7   24.7 20th 12.6   7.8 5th 29.0
Swansea Post Office 20.4 +1.4 34.5 20th 10.0 +1.1 5.9 1st 13.8 51.1 low 27%
Midlands (district 93)
Ross 23.4 +3.8 33.1 20th 8.2 +1.8 0.0 1st 17.0 42.0 very low 40%
Southeast (district 94)
Bull Bay 19.2 +1.4 28.0 20th 9.3 +0.2 6.0 1st 8.6 49.0 lowest 18%
Campania 22.6   32.8 20th 9.1   2.1 1st 2.0
Cape Bruny 17.9 +1.3 26.8 20th 10.1 +0.6 7.2 3rd 8.2 47.6 very low 17%
Cape Bruny Lighthouse 16.9 +1.4 25.7 20th 10.4 +1.4 7.5 3rd 9.6 75.3 lowest 13%
Dover 18.7 +1.3 26.7 20th 7.9 +0.1 3.6 3rd 7.4 71.5 lowest 10%
Geeveston 20.0 +1.9 30.2 20th 8.6 +1.1 3.4 1st 10.0 69.6 very low 14%
Grove 20.9 +2.4 32.1 20th 7.8 +0.7 0.9 1st 6.8 65.9 very low 10%
Grove 20.7   32.5 20th 6.7   0.0 1st 7.2
Hobart 20.6 +2.0 30.1 20th 10.5 +1.3 5.8 1st 7.0 53.7 very low 13%
Hobart Airport 20.9 +2.0 33.7 20th 10.3 +1.2 6.5 1st 3.6 42.8 very low 8%
Maatsuyker Island Lighthouse 15.0 +0.6 21.7 18th 10.0 +1.6 7.1 5th 11.0 92.0 lowest 12%
Melton Mowbray 22.1 +2.5 32.3 20th 7.9 +0.7 0.2 1st 3.2 33.8 very low 9%
Mount Wellington 12.2 +3.3 22.0 20th 3.2 +1.8 −2.8 5th 30.8 79.2 low 39%
Tasman Island 16.0   27.6 19th 9.4   5.6 5th 14.0
Tunnack Fire Station 19.8 +2.7 29.0 16th 6.8 +1.1 −1.0 1st 12.2 46.1 low 26%
Derwent Valley (district 95)
Bushy Park 23.3 +3.5 33.5 19th 8.1 +0.6 0.5 1st 6.6 53.1 very low 12%
Maydena Post Office 20.3 +2.6 31.0 19th 7.1 +0.8 0.2 5th 15.6 90.9 very low 17%
Moogara 18.5 +3.1 27.0 19th 6.9 +1.6 2.0 1st 8.2 68.3 very low 12%
Ouse Fire Station 23.6 +2.8 33.5 19th 7.2 +0.4 −0.5 1st 6.6 33.7 low 20%
Tarraleah Village 19.4 +3.4 29.2 19th 6.3 +1.7 0.0 1st 8.8 97.2 lowest 9%
Central Plateau (district 96)
Lake St Clair National Park 19.1 +4.0 27.7 19th 4.1 +0.7 −2.6 1st 24.8 137.5 very low 18%
Liawenee 17.9   25.6 19th 4.2   −1.4 5th 8.4
West Coast (district 97)
Hartz Mountain 16.4 +2.8 29.1 19th 5.1 +1.0 0.3 4th 17.0 64.6 very low 26%
Mount Read 13.5 +3.0 20.2 19th 4.4 +1.6 0.4 1st 39.4
Scotts Peak Dam 20.5 +3.2 31.1 19th 7.8 +1.3 3.3 3rd 11.4
Strahan Aerodrome 18.9 +1.4 25.4 19th 9.0 +0.9 3.3 3rd 18.6 91.0 low 20%
Strathgordon Village 18.3 +2.3 28.6 19th 8.4 +1.5 3.8 3rd 25.5 179.1 lowest 14%
Warra 17.6   29.5 20th 6.7   2.4 3rd 15.4
King Island (district 98)
King Island Airport 18.5 +1.5 24.7 19th 10.7 +0.9 5.1 1st 14.2 56.1 very low 25%
Flinders Island (district 99)
Flinders Island Airport 19.9 +1.5 30.7 20th 11.2 +1.1 3.6 6th 24.0 54.4 very low 44%
Hogan Island 18.0   27.9 19th 12.6   9.6 5th 50.2
Macquarie Island (district 300)
Macquarie Island 6.6 +0.1 8.2 20th 2.9 +0.2 −3.4 5th 69.0 70.3 normal 98%


Notes

This statement has been prepared based on information available at 10 am on Monday 3 December 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