Monday, 2 July 2007 - Monthly Climate Summary for Tasmania - Product code IDCKGC17R0

Tasmania in June 2007:
Winter with a blast

Summary

In stark contrast to May, June 2007 was an exceptionally cold and dry month; many sites had their coldest or driest June on record. The unusual conditions were caused by high pressure systems south of the Bight and cold air surges over the Southern Ocean directing very cold air over the state.  

Details

Very cold: A change on the 1st of the month set the scene for an exceptionally cold month, with both overnight and daytime temperatures  well below average. Minimum (overnight) temperatures were down by about 2°C for most of the state, but some spots were over 3 °C below normal for June. Some places had their coldest mean minimum temperature on record or coldest mean maximum (daytime) temperature on record,  while others had their coldest temperatures for at least 20 years.

Frosts: With such cold conditions and a lack of many windy days, frosts were common around the state. Frost was recorded in each district of the state on almost every day, with a particularly severe run occurring from the 18th to 22nd. Just one example of the extent of the cold was Grove, which had 25 nights – including 23 in a row – where the temperature dropped to 2°C; a typical June sees around 15 such cold nights, and in May there was only one.  Liawenee, a cold place at the best of times, had four nights below −8°C compared to an average of only one every two years. Similar frosty stories were told across the state: Wynyard and Eddystone Point recorded their lowest-ever June temperatures.

Very dry: In contrast to last month where some sites had their wettest May on record, many places in the northern and central parts of the state had record low rainfall for June. A good example is Launceston which had its wettest May (with 141 mm) followed by its driest June (with less than 6 mm) on record. Slow moving high pressure systems sitting south of the Great Australian Bight were close enough to the state to generally keep skies clear with the passage of only a few fronts during the month, bringing light and patchy rain or showers to most districts.

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

Extremes

Hottest day
Highest temperature
19.1°C at Bicheno (Council Depot) on the 6th
Warmest days on average
Highest mean daily maximum temperature
13.6°C at Eddystone Point  and Flinders Island Airport
Coolest days on average
Lowest mean daily maximum temperature
2.1°C at Mount Wellington
Coldest day
Lowest daily maximum temperature
−2.2°C at Mount Wellington on the 18th
Coldest night
Lowest temperature
−8.8°C at Liawenee on the 18th
Coolest nights on average
Lowest mean daily minimum temperature
−3.6°C at Liawenee
Warmest nights on average
Highest mean daily minimum temperature
9.3°C at Hogan Island
Warmest night
Highest daily minimum temperature
11.6°C at Hogan Island on the 10th
Wettest overall
Highest total rainfall
181.6 mm at Mount Victoria
Driest overall
Lowest total rainfall
2.8 mm at Verwood (Isis River)
Wettest day
Highest daily rainfall
80.6 mm at Mount Victoria on the 2nd
Highest wind gust
113 km/h at Hogan Island on the 27th

Records


Record lowest total June rainfall
Total rainfall
for June 2007 (mm)
Previous lowest
for June
Years of
record
Normal for
June
Frankford (Rossville) 8.2 13.7 in 1930 115 122.5
Launceston Airport Comparison 8.6 11.7 in 1934 75 61.9
Burnie (Round Hill) 22.2 27.3 in 1949 63 104.0
Cradle Valley (Waldheim) 45.6 52.4 in 1930 61 273.4
Forthside Research Station 27.0 29.0 in 1969 42 99.9
Barrington Post Office 21.8 36.2 in 1969 41 117.3
Savage River Mine 76.4 87.5 in 2005 40 198.2
Scottsdale (West Minstone Road) 4.8 19.2 in 2006 36 103.7
Westbury (Birralee Road) 7.0 24.4 in 2006 30 77.0
Launceston (Ti Tree Bend) 5.8 10.4 in 2006 28 65.7

Lowest total June rainfall for at least 20 years
Total rainfall
for June 2007 (mm)
Most recent lower
for June
Years since
lower
Normal for
June
Bushy Park (Bushy Park Estates) 9.0 3.2 in 1930 77 48.5
Yolla (Sea View) 36.0 13.8 in 1930 77 158.1
Mole Creek 13.6 13.3 in 1930 74 114.6
Elliott Research Station 30.6 11.2 in 1930 70 132.3
Latrobe (Coal Road) 17.7 17.6 in 1937 69 109.6
Ulverstone (Knights Road) 25.0 18.6 in 1937 69 110.4
Ringarooma (Fry Street) 20.8 18.3 in 1934 68 132.6
Irishtown 51.0 42.7 in 1951 51 132.6
Lorinna 23.0 19.1 in 1937 33 147.0
Wynyard Airport 32.8 31.9 in 1949 33 111.8
Cape Sorell 51.8 30.6 in 1951 32 143.3



Record lowest June daily maximum temperature
Lowest daily maximum
temperature
in June 2007 (°C)
Previous lowest
for June
Years of
record
Normal for
June
Scottsdale (West Minstone Road) 7.0 on the 21st 7.1 on the 7th in 1973 28 12.6




Record lowest June mean daily maximum temperature
Mean daily maximum
temperature
for June 2007 (°C)
Previous lowest
for June
Years of
record
Normal for
June
Orford (Aubin Court) 11.6 11.8 in 1992 37 13.3
Mount Wellington 2.1 2.2 in 1968 27 3.5
Launceston (Ti Tree Bend) 11.9 12.0 in 1985 24 13.0
Tarraleah Village 7.2 7.4 in 1992 23 8.8
Fingal (Legge Street) 10.6 10.8 in 1992 22 12.8
Geeveston (Cemetery Road) 11.0 = 11.0 in 1992 20 12.2

Lowest June mean daily maximum temperature for at least 20 years
Mean daily maximum
temperature
for June 2007 (°C)
Most recent lower
for June
Years since
lower
Normal for
June
Hobart (Ellerslie Road) 10.8 10.3 in 1953 54 11.9
Swansea Post Office 12.5 12.3 in 1978 29 13.8
Grove (Comparison) 10.4 10.2 in 1978 26 12.1
Strathgordon Village 7.9 7.7 in 1986 21 9.5
Scamander 13.3 12.6 in 1978 20 14.4



Record lowest June temperature
Lowest temperature
in June 2007 (°C)
Previous lowest
for June
Years of
record
Normal for
June
Eddystone Point −0.4 on the 22nd 0.1 on the 7th in 1973 50 7.9
Wynyard Airport −3.5 on the 18th = −3.5 on the 11th in 2006 21 4.2




Record lowest June mean daily minimum temperature
Mean daily minimum
temperature
for June 2007 (°C)
Previous lowest
for June
Years of
record
Normal for
June
Bushy Park (Bushy Park Estates) −1.0 = −1.0 in 1989 73 2.2
Grove (Comparison) 0.5 0.7 in 1983 52 2.4
Strathgordon Village 1.5 1.9 in 1973 36 3.8
Wynyard Airport 0.9 1.4 in 2006 22 4.2

Lowest June mean daily minimum temperature for at least 20 years
Mean daily minimum
temperature
for June 2007 (°C)
Most recent lower
for June
Years since
lower
Normal for
June
Hobart (Ellerslie Road) 3.3 2.9 in 1937 70 5.2
Hobart Airport 3.1 3.0 in 1963 44 4.6
Macquarie Island 0.1 −0.1 in 1972 35 1.5
Swansea Post Office 3.2 3.1 in 1985 22 4.4
Burnie (Round Hill) 5.7 5.5 in 1986 21 6.7
Orford (Aubin Court) 3.0 2.8 in 1986 21 4.1


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 June 2007
Maximum temperatures
for June
(°C)
Minimum temperatures
for June
(°C)
Rainfall
for June
(millimetres)
Mean for
June
2007
Diff
from
normal
Highest for
June
2007
Mean for
June
2007
Diff
from
normal
Lowest for
June
2007
Total for
June
2007
Normal
for
June
Rank of
June
2007
Fraction of
June
normal
Northern (district 91)
Bridport 13.2 −0.8 15.5 28th 4.5 −1.8 −0.5 22nd 24.9 89.2 very low 28%
Burnie 13.3 −0.1 16.4 6th 5.7 −1.0 2.2 18th 22.2 104.0 lowest 21%
Cape Grim BAPS 11.8 −1.1 14.6 16th 6.9 −1.8 3.5 18th 97.8 80.9 high 121%
Cressy Research Station 11.0 13.7 22nd −0.7 −5.2 20th 3.2
Devonport Airport 12.6 −0.7 16.3 6th 2.9 −2.1 −1.8 20th 15.8 79.8 very low 20%
Launceston 11.9 −1.1 14.2 5th 1.0 −1.8 −4.1 22nd 5.8 65.7 lowest 9%
Launceston Airport 11.0 13.6 6th 0.7 −4.0 20th 7.4
Launceston Airport Comparison 10.4 −1.1 13.2 6th 0.8 −2.0 −4.1 22nd 8.6 61.9 lowest 14%
Low Head 12.5 −1.0 15.1 6th 5.0 −2.6 1.0 22nd 11.2 74.7 very low 15%
Luncheon Hill 10.5 −0.7 14.0 28th 3.3 −2.4 −1.0 19th 62.2 146.2 low 43%
Marrawah 12.0 −0.7 15.2 16th 5.5 −1.9 1.8 18th 73.0 124.6 very low 59%
Powranna 10.5 −1.4 13.6 22nd 0.1 −2.2 −4.0 18th 6.0 47.0 very low 13%
Scottsdale 12.0 −0.7 14.6 22nd 3.1 −1.1 −1.7 22nd 4.8 103.7 lowest 5%
Sheffield School Farm 10.5 −1.1 15.2 6th 1.3 −2.6 −3.6 18th 20.4 111.1 very low 18%
Smithton Aerodrome 12.5 −1.2 15.5 28th 1.6 −3.6 −2.8 18th 55.6 97.8 low 57%
Wynyard Airport 12.7 −0.5 16.5 6th 0.9 −3.3 −3.5 18th 32.8 111.8 very low 29%
East Coast (district 92)
Bicheno 13.3 −1.2 19.1 6th 6.1 −0.5 2.9 10th 84.8 60.6 high 140%
Eddystone Point 13.6 −0.1 15.8 6th 7.4 −0.6 −0.4 22nd 62.8 74.6 normal 84%
Fingal 10.6 −2.2 17.0 6th 0.1 −0.9 −4.5 23rd 42.6 64.6 normal 66%
Friendly Beaches 12.0 −2.2 16.9 6th 4.9 −1.5 0.9 24th 94.8 38.6 very high 246%
Lake Leake 7.6 −1.4 12.4 6th −1.3 −2.0 −6.9 18th 28.6 86.7 very low 33%
Maria Island 12.0 15.8 6th 6.7 4.0 20th 28.8
Orford 11.6 −1.7 15.3 6th 3.0 −1.1 −1.2 25th 45.0 51.2 normal 88%
Scamander 13.3 −1.1 18.4 6th 5.1 −0.3 0.2 22nd 65.4 49.7 high 132%
St Helens Aerodrome 12.7 18.1 6th 4.3 −1.0 22nd 56.8
Swan Island 13.1 15.4 16th 7.8 3.8 20th 64.6
Swansea Post Office 12.5 −1.4 17.5 6th 3.2 −1.2 −1.5 18th 48.8 57.3 normal 85%
Midlands (district 93)
Ross 10.5 −1.2 13.3 6th −0.9 −2.8 −6.0 18th 12.8 36.7 very low 35%
Southeast (district 94)
Bull Bay 11.2 −1.4 15.0 6th 4.3 −2.0 1.5 18th 39.4 44.8 normal 88%
Campania 11.8 15.5 5th 1.6 −2.8 18th 18.4
Cape Bruny 11.2 −1.3 14.1 6th 5.9 −1.3 3.5 18th 86.0 68.7 normal 125%
Cape Bruny Lighthouse 10.9 −0.7 13.9 6th 5.8 −0.9 3.5 18th 109.6 90.1 high 122%
Dover 11.5 −1.1 15.0 5th 1.9 −2.0 −1.8 18th 57.8 79.1 normal 73%
Geeveston 11.0 −1.2 15.1 5th 0.2 −1.9 −3.1 10th 42.4 70.7 low 60%
Grove 10.4 −1.8 14.4 6th 0.5 −2.0 −4.8 18th 37.4 60.8 low 62%
Grove 10.2 14.3 6th −0.1 −5.0 18th 35.6
Hobart 10.8 −1.1 15.1 6th 3.3 −1.9 −0.4 18th 29.6 54.0 low 55%
Hobart Airport 11.7 −1.2 16.1 6th 3.1 −1.5 −0.7 18th 21.6 30.3 normal 71%
Maatsuyker Island Lighthouse 10.6 −0.8 13.3 25th 6.6 −0.6 3.1 21st 56.4 118.9 very low 47%
Melton Mowbray 9.6 −2.4 13.2 10th −0.7 −3.0 −6.4 18th 10.0 32.4 low 31%
Mount Wellington 2.1 −1.4 10.0 9th −2.1 −1.3 −5.6 18th 36.8 63.3 normal 58%
Tasman Island 10.0 13.3 16th 5.6 1.2 18th 87.6
Tunnack Fire Station 8.2 −1.9 11.4 5th −0.2 −2.5 −6.3 18th 30.2 48.9 normal 62%
Derwent Valley (district 95)
Bushy Park 10.3 −0.9 15.5 5th −1.0 −3.1 −6.0 18th 9.0 48.5 very low 19%
Maydena Post Office 9.3 −1.5 14.0 28th 0.3 −2.2 −3.5 18th 32.8 100.9 very low 33%
Moogara 7.8 −1.2 12.0 5th 0.9 −1.5 −1.5 24th 21.4 67.8 very low 32%
Ouse Fire Station 10.0 15.4 5th −1.7 −6.1 18th 5.0
Tarraleah Village 7.2 −1.6 11.0 10th −1.6 −2.2 −4.9 18th 33.6 102.2 very low 33%
Central Plateau (district 96)
Lake St Clair National Park 6.1 −1.6 9.2 28th −2.5 −2.8 −5.5 18th 51.8 173.5 very low 30%
Liawenee 5.2 13.8 9th −3.6 −8.8 18th 13.0
West Coast (district 97)
Hartz Mountain 5.8 −1.4 13.0 9th 0.3 −2.0 −3.0 21st 77.2
Mount Read 3.4 −1.2 9.5 28th −1.0 −2.0 −5.2 21st 148.8 360.1 very low 41%
Scotts Peak Dam 8.2 11.4 28th 1.8 −0.5 27th 113.0
Strahan Aerodrome 11.4 −1.2 15.5 26th 2.8 −3.0 −0.3 14th 78.6 164.9 very low 48%
Strathgordon Village 7.9 −1.5 10.6 28th 1.5 −2.3 −1.5 19th 102.9 216.4 very low 48%
Warra 7.5 10.6 26th 1.3 −2.2 18th 65.6
King Island (district 98)
King Island Airport 13.1 −0.7 16.6 16th 6.9 −1.3 2.9 14th 54.4 95.8 very low 57%
Flinders Island (district 99)
Flinders Island Airport 13.6 −0.4 16.5 16th 5.5 −1.6 0.0 20th 69.2 72.7 normal 95%
Hogan Island 12.9 15.6 16th 9.3 6.4 18th 67.0
Macquarie Island (district 300)
Macquarie Island 4.4 −0.6 7.6 16th 0.1 −1.4 −5.5 7th 80.0 76.5 normal 105%

Notes

This statement has been prepared based on information available at 12 pm on Monday 2 July 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 or Tom Delfatti
Tasmania and Antarctica Climate Services Centre
Bureau of Meteorology
Phone (03) 6221 2043
Email climate.tas@bom.gov.au