Australian Weather News
Monday, 12 AUG 2002
outbreak brings widespread light snow, gales, hail to Vic, Tas, NSW
NEWSBITS: Record cold night in SE WA
Stormy, wintry weather swept across SA, Victoria and NSW today as an upper cold pool traversed the states in the wake of a cold front. The most significant weather crossed the SE SA and western Victorian coasts before dawn, then pushed on through southern NSW during the afternoon. A succession of rainbands moved through Victoria during the morning, after which widespread wintry showers developed in northern Victoria and southern NSW late morning and early afternoon in the cold, unstable airstream. Balloon ascents at 9 this morning reported temperature drops of around 11 to 14° in the past 24 hours in the middle atmosphere. At Mt Gambier, the 500hPa (18,000 feet) temperature dropped from -20 to -33.5, while Wagga's trace showed a drop at 550hPa of 14°.
The first reports of significant weather came from a truck driver who was hit by a major hailstorm 30km north of Millicent in SE SA around 4am. Golf-ball sized hail broke his truck window and the truck slid off the road in hail drifts 10 to 15cm deep. Snow was reported around dawn on the Otway Ranges in Victoria southwest of Melbourne, with the lowest altitude reports coming from Bambra on the northern slopes at around 300m. The cold pool moved over the central and southern NSW ranges between late morning and late afternoon. Light snow was reported from Oberon and the Blue Mountains around noon, with a noon temperature at Mt Boyce, between Blackheath and Mt Victoria, of 2.5°. Canberra Airport reported a temperature of 4° with hail at 3pm, and snow fell down to 750m on Mt Taylor in southwestern Canberra suburbs, with a snow line to 850m, late afternoon. Snow was also reported falling at Tidbinbilla, Tumbarumba and Goulburn late afternoon, while strong winds and falling snow created blizzard-like conditions north of Goulburn between Crookwell and Bigga. Though snow accumulations were small north of the Alps due to the dryness of the airmass, there was still enough to cause icy roads, with two cars reported stuck in icy conditions near Lithgow late afternoon. The Snowy Mountains fared better, with Thredbo Village recording 46mm and Perisher Valley 55mm precipitation falling as snow between 9am and 3pm.
Gale to storm force, squally winds accompanied the cold pool, gusting to 115km/h at Wilsons Promintory in Victoria and 113km/h at Maatsuyker Island, Tasmania. Strong squalls, or possibly a waterspout drifting onshore, ripped a quarter of the roof off the Seal Rocks Sea Life Centre on Phillip Island during the afternoon. Gale force winds also raised dust in NW Victoria, with a top gust of 93km/h at Walpeup early afternoon. A waterspout is also likely to have come ashore at Seal Rocks, NSW, during the afternoon.
With the main body of cold air crossing to its north, Tasmania received only light snow down to 700m. However, heavier rain began falling in parts of the southeast late in the day as southerly winds wound up around the low pressure system moving away to the east.
NEWSBITS: An abnormally cold night in far southeastern WA produced a record low minimum August temperature for Balgair of -1.4°.
weather extremes for today
|Quality control note: Data is complete, and has been visually checked by AWN for gross errors. Less obvious errors may remain. See Explanation of Extremes Pages for more information
set this day (previous
record and years of computerised record shown in brackets):
Lowest daily minimum temperature for August:
Balgair WA: -1.4 (-1.0, 18)
Todays highest rainfall totals for the 24 hours to 9am. It includes the top 5 totals received, and/or all reported falls of 50mm or more.
44.4 PORT CAMPBELL POST OFFICE W Coast VIC
High rainfall for periods of 6 hours or less.
Todays highest & lowest temperatures
36.2 CURTIN AERO W Kimberley WA
36.0 WYNDHAM AERO N Kimberley WA
36.0 FITZROY CROSSING AERO W Kimberley WA
36.0 WEST ROEBUCK W Kimberley WA
35.4 DERBY AERO W Kimberley WA
26.0 NORTHERN ENDEAVOUR Islands
24.0 COCONUT ISLAND N Peninsula QLD
23.0 MCCLUER ISLAND Darwin-Daly NT
22.5 BLACK POINT Darwin-Daly NT
22.3 TROUGHTON ISLAND N Kimberley WA
-4.0 THREDBO (CRACKENBACK STATION) AWS Snowy Mtns NSW
-1.0 CABRAMURRA SMHEA AWS SW Slopes S NSW
-0.6 MT HOTHAM Upper NE VIC
0.0 MOUNT BULLER Upper NE VIC
0.4 MOUNT WELLINGTON Southeast TAS
-5.0 THREDBO (CRACKENBACK STATION) AWS Snowy Mtns NSW
-4.4 MT HOTHAM Upper NE VIC
-4.0 MOUNT BULLER Upper NE VIC
-3.5 CHARLOTTE PASS (KOSCIUSKO CHALET) Snowy Mtns NSW
-3.5 PERISHER VALLEY SKI CENTRE Snowy Mtns NSW
Todays greatest temperature variations from normal
25.4 QUANDIALLA POST OFFICE SW Slopes N NSW
+8.3 27.9 COFFS HARBOUR MO MidNorth Coast N NSW
+8.3 27.1 PORT MACQUARIE (HILL STREET) MidNorth Coast S NSW
+7.8 27.7 TAREE (RADIO STATION 2RE) MidNorth Coast S NSW
+7.0 26.6 SOUTH WEST ROCKS (SMOKY CAPE LIGHTHOUSE) MidNorth Coast N NSW
17.7 RIVERVIEW OBSERVATORY Sydney--east NSW
+10.4 13.4 DUNEDOO POST OFFICE CW Slopes N NSW
+10.2 18.1 SYDNEY AIRPORT AMO Sydney--east NSW
+10.1 16.1 BANKSTOWN AIRPORT AWS Sydney--east NSW
+9.8 13.2 GULGONG POST OFFICE C Tablelands N NSW
0.9 THREDBO VILLAGE Snowy Mtns NSW
-5.4 7.6 EDI UPPER Upper NE VIC
-5.3 6.9 TUMBARUMBA POST OFFICE SW Slopes S NSW
-5.3 8.0 CASTLEMAINE PRISON N Central VIC
-5.1 27.0 VICTORIA RIVER DOWNS Victoria NT
-5.1 16.7 KULGERA Alice Springs NT
-1.4 BALGAIR Eucla WA
-7.0 -1.5 NORSEMAN Goldfields WA
-6.5 -0.8 NORTHAM Cent Wheatbelt WA
-6.5 -0.9 NARROGIN Gt Southern WA
-6.4 -1.0 DWELLINGUP FORESTRY SW & S Coast WA
Highest wind gusts above 89km/h or mean wind above 62km/h (gale force). Wind direction and mean windspeed shown in brackets.
BELLAMBI AWS Illawarra NSW: 93 (280/ 59 ) at 22:00