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MONTHLY CLIMATE SUMMARY - TASMANIA
There were fewer than normal cold fronts or periods of westerly
winds affecting Tasmania during September 2005. A low passed close to
the State around the 11th and 12th, bringing very heavy falls to the
southeast and the north, but the west coast had less rain than usual.
Wet in the southeast: A low pressure system close to Tasmania
on the 11th and 12th brought record-breaking rain in to the southeast
of the State. Several locations had their wettest-ever September day in
the 24 hours to 9 am on the 12th. The rain was so great that some,
including Hobart Airport, had achieved their wettest-ever September by
the morning of the 12th. Premaydena Hatchery on the Tasman Peninsula
had the wettest single day, registering 84.4 mm in the 24 hours to 9 am
on the 12th. There was very little rain in the southeast between the 18th and when a cold front crossed on the 28th.
Flooding in the north: Flooding in rivers in the north of the
State at the end of August continued into the start of September,
although there was little extra rain for the first week or more. A low brought rain to
the north around the 11th and 12th, with the South Esk river rising
above flood level once more. Diddleum in the northeast highlands
registered 289.8 mm for September, making it the wettest spot in
Tasmania for the month.
Relatively dry in the west: Rainfall was below average
in the west of the State, as there were fewer than normal active cold
fronts. Many sites in the west received only about 60 to 70 % of their
normal September rain.
Few cold days: Most days saw temperatures that were close to,
or above, normal. The 8th was the warmest day for many places, with
temperatures up to 10 degrees above normal in some spots. There were
very few cold days, the main one being the 12th when temperatures were
about 5 degrees below normal. Averaged across the month, maximum
(daytime) temperatures were about one-half to one degree above normal.
Mostly moderate nights: There were a few quite cool nights,
particularly at the start of the month, around the 14th, and again
around the 26th. However, warm weather dominated, with marked warm
bursts around the 9th (with overnight temperatures about 5 to 8 °C
above normal), the 23rd, and at the end of the month. Overall, average
minimum (overnight) temperatures were above normal by around half a
degree in most places.
Two windy bursts: There were only two main windy periods
during September. The low that caused so much rain around the 11 and
12th also brought very strong southerly winds as it cleared to the
east. There were also some strong westerly winds when a cold front that
crossed at the end of the month.
Included in this summary are a table of State extremes,
some new records (for wettest September or wettest September day),
and summary statistics for sites across the State.
Weather extremes during September 2005 | ||
|---|---|---|
| Highest temperature Hottest day |
24.8 °C | Hartz Mountain on 8th |
| Highest mean daily maximum temperature Warmest days on average |
16.7 °C |
Swansea
and Campania |
| Lowest mean daily maximum temperature Coolest days on average |
5.7 °C | Mount Wellington |
| Lowest daily maximum temperature Coldest day |
-0.9 °C | Mount Wellington on 12th |
| Lowest temperature Coldest night |
-7.6 °C | Liawenee on 26th |
| Lowest mean daily minimum temperature Coldest nights on average |
-0.9 °C | Liawenee |
| Highest mean daily minimum temperature Mildest nights on average |
9.2 °C | Swan Island |
| Highest daily minimum Warmest night |
14.3 °C | King Island Airport on 9th |
| Highest total rainfall Wettest overall |
289.8 mm | Diddleum |
| Lowest total rainfall Driest overall |
42.0 mm | Ouse |
| Highest daily rainfall Wettest day |
84.4 mm | Premaydena on 12th |
Highest Total Rainfall for 20 or more years for September |
|||
|---|---|---|---|
|
Total rainfall for September 2005 (mm) |
Most recent higher for September |
||
| Sorell | 107.0 | 110.8 | in 1917 |
| Orford | 120.8 | 121.6 | in 1966 |
| Bull Bay | 95.2 | 101.4 | in 1984 |
| Dover | 147.0 | 150.6 | in 1984 |
| Levendale | 112.0 | 126.4 | in 1984 |
| Lewis Hill | 87.0 | 127.4 | in 1984 |
| York Plains | 89.4 | 126.9 | in 1984 |
| Lunawanna | 117.8 | 149.8 | in 1984 |
| Nugent | 129.4 | 152.1 | in 1984 |
| Copping | 108.0 | 135.0 | in 1984 |
| Oatlands | 90.4 | 100.2 | in 1984 |
| Fort Direction | 75.4 | 83.6 | in 1984 |
| Tooms Lake | 75.8 | 135.0 | in 1984 |
Summary statistics for September 2005 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Maximum temperatures for September (°C) |
Minimum temperatures for September (°C) |
Rainfall for September (mm) |
|||||||
| Mean for 2005 | Difference from normal | Highest for 2005 | Mean for 2005 | Difference from normal | Lowest for 2005 | Total for 2005 | Normal total | Ranking | |
| Hobart | 15.5 | +0.5 | 23.3 | 6.9 | +0.5 | 2.5 | 114 | 53 | very high |
| Launceston | 15.6 | +0.1 | 20.8 | 5.3 | +0.2 | 0.4 | 112 | 67 | very high |
| Burnie | 14.9 | +0.7 | 19.1 | 7.7 | +1.0 | 3.3 | 97 | 88 | normal |
| Devonport |
14.1 | +0.1 | 18.3 | 6.4 | +0.5 | 0.7 | 107 | 76 | high |
| Swansea | 16.7 | +0.8 | 23.8 | 6.4 | +0.6 | 1.8 | 74 | 41 | very high |
| Strahan |
15.2 | +0.9 | 22.6 | 6.3 | +0.1 | 1.6 | 82 | 155 | very low |
| Strathgordon |
12.5 | +1.0 | 21.8 | 4.5 | +0.3 | 1.5 | 140 | 274 | low |
| King Island Airport | 14.8 | +0.4 | 22.0 | 7.7 | -0.5 | 2.1 | 84 | 89 | normal |
| Flinders Island Airport | 15.4 | +0.5 | 20.9 | 7.7 | +0.2 | 1.6 | 81 | 65 | high |
| Bicheno | 16.2 | +0.2 | 23.2 | 7.2 | -0.1 | 2.9 | 57 | 44 | high |
| Bridport | 14.8 | 0 | 18.1 | 6.8 | 0 | 2.0 | 107 | 81 | high |
| Bull Bay | 14.9 | +0.2 | 22.0 | 7.2 | +0.4 | 4.0 | 95 | 54 | very high |
| Bushy Park | 16.4 | +1.0 | 24.0 | 3.6 | -0.3 | -1.8 | 51 | 54 | normal |
| Campania | 16.7 | 22.7 | 5.0 | 0.2 | |||||
| Cape Bruny |
13.9 | +0.7 | 23.0 | 8.0 | +1.0 | 2.5 | 91 | 81 | normal |
| Cape Grim |
14.2 | +0.8 | 18.8 | 8.4 | -0.3 | 4.8 | 98 | 75 | normal |
| Cressy | 14.7 | 19.3 | 4.6 | -1.5 | 106 | ||||
| Dover | 15.3 | +0.8 | 24.5 | 5.0 | +0.1 | 1.1 | 147 | 83 | high |
| Eddystone Point | 16.2 | +1.5 | 20.1 | 8.2 | +0.3 | 4.2 | 61 | 63 | normal |
| Fingal | 15.1 | -0.1 | 21.9 | 3.4 | +0.2 | -1.3 | 71 | 49 | high |
| Friendly Beaches | 16.5 | 22.2 | 7.1 | 2.4 | 77 | ||||
| Geeveston | 15.6 | +0.9 | 24.1 | 5.0 | +0.7 | -0.5 | 106 | 89 | normal |
| Grove | 15.8 | +1.0 | 23.7 | 4.6 | +0.5 | -1.7 | 114 | 73 | high |
| Grove | 15.5 | 23.0 | 4.1 | -2.1 | 119 | ||||
| Hartz Mountain | 10.6 | 24.8 | 2.4 | -1.7 | 74 | ||||
| Hobart Airport | 16.0 | +0.8 | 23.0 | 6.8 | +0.8 | 2.8 | 109 | 41 | highest |
| Lake Leake | 12.3 | +1.2 | 17.9 | 2.5 | +0.5 | -3.4 | 102 | 70 | high |
| Lake St Clair | 11.3 | +1.4 | 16.6 | 0.6 | -0.2 | -4.2 | 146 | 205 | low |
| Launceston Airport | 15.1 | 20.7 | 4.4 | 0.2 | 95 | ||||
| Launceston Airport (old site) |
14.3 | +0.3 | 19.7 | 3.8 | -0.5 | -1.0 | 100 | 64 | high |
| Liawenee | 9.9 | 17.0 | -0.9 | -7.6 | |||||
| Low Head | 14.1 | 16.0 | 8.3 | 4.3 | 98 | ||||
| Luncheon Hill | 13.5 | +1.4 | 18.9 | 5.6 | +0.1 | 1.9 | 149 | 182 | normal |
| Maatsuyker Island |
12.4 | +0.3 | 19.5 | 7.9 | +1.2 | 4.6 | 76 | 110 | low |
| Maria Island | 15.1 | 20.1 | 8.3 | 5.7 | 99 | ||||
| Marrawah | 14.3 | +0.7 | 19.2 | 7.9 | +0.5 | 4.2 | 121 | 105 | normal |
| Maydena | 14.5 | +0.9 | 23.6 | 3.8 | +0.5 | -2.5 | 79 | 135 | normal |
| Melton Mowbray | 14.7 | 20.7 | 4.3 | -0.9 | 78 | ||||
| Moogara | 12.2 | +1.1 | 19.4 | 3.6 | +0.5 | -0.7 | 83 | 92 | normal |
| Mount Read | 6.3 | +0.9 | 11.6 | 0.7 | +0.3 | -2.7 | 214 | ||
| Mount Wellington | 5.7 | +1.6 | 13.5 | -0.1 | +1.4 | -4.7 | 92 | 65 | high |
| Orford | 15.6 | -0.1 | 23.2 | 6.1 | +0.6 | 2.1 | 121 | 51 | very high |
| Ouse |
16.0 | 22.7 | 3.0 | -2.8 | 42 | ||||
| Powranna | 14.7 | +0.5 | 19.5 | 4.8 | +0.9 | 0.1 | 104 | 63 | very high |
| Ross | 14.7 | +0.4 | 19.6 | 4.4 | +0.9 | -1.0 | 102 | 53 | very high |
| Scamander | 15.8 | -0.4 | 22.2 | 6.7 | +0.1 | 2.0 | 56 | 53 | normal |
| Scotts Peak Dam | 13.5 | 23.9 | 4.6 | 0.9 | 117 | ||||
| Scottsdale | 14.5 | +0.3 | 19.5 | 4.9 | +0.1 | 0.0 | 107 | 100 | normal |
| Sheffield | 13.3 | 16.9 | 5.5 | -0.5 | 130 | ||||
| Smithton |
15.0 | 18.4 | 5.7 | -0.3 | 124 | ||||
| St Helens |
15.8 | 21.3 | 6.5 | 2.6 | 65 | ||||
| Swan Island | 15.0 | 20.6 | 9.2 | 6.7 | 100 | ||||
| Tarraleah |
12.2 | +1.2 | 19.8 | 2.0 | +0.3 | -3.1 | 92 | 118 | normal |
| Tasman Island | 12.7 | 18.3 | 7.4 | 4.0 | 164 | ||||
| Tunnack |
12.6 | 17.5 | 3.3 | -2.2 | 129 | ||||
| Warra | 12.0 | 21.4 | 4.1 | 0.1 | 110 | ||||
| Wynyard |
14.6 | +0.5 | 18.1 | 4.6 | -0.4 | -1.3 | 92 | 95 | normal |
This statement has been prepared based on information available at 9 am on Monday 3 October 2005 . Although every effort has been made to check them, it is possible that results will change as new information becomes available.
"Normals" are based on all available years of record, which vary widely from site to site . Sites without normals shown do no have sufficient record for them to be calculated reliably.
The "Ranking" indicates about where rainfall this time ranks in the climate record for the site.
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