Sunday 03 AUG 2003

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2003

Dec

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Damaging gales, heavy rain in SW WA
Temperature extremes in the west
Warm, strong northwesterlies in the southeast

Minimum temperatures this morning (right) and their departure from normal (middle). BoM

Below: Six-hour surface analyses from 10pm last night to 10pm tonight. A strong cold front moves across the southern half of WA attached to a slowly deepening secondary Low south of the Bight. By 10 this evening, the central pressure of the Low, less than 1,000km SW of TAS, is down to 962hPa while a strong High, the product of the cold airmass of the past few days, weakens little as it drifts into the Tasman, only a few hundred kilometres NE of TAS. The resulting strong pressure gradient brings widespread strong wind to TAS, VIC, and southern SA and NSW. BoM

Around 31,000 homes lost power in Perth and to the south of the city overnight as strong, squally winds brought down trees and powerlines in SW WA. Around 6,000 were still without power late this morning as Western Power crews from surrounding districts were brought into country areas south of Perth to restore service. The strongest recorded wind gusts were 121km/h at Cape Leeuwin around 8 last night, 109 at Rottnest Island at midnight, and 100 at Ocean Reef, Bickley and Mandurah in the early hours (see Gusts)

Heavy rain accompanied the front, giving many parts of the Southwest 20 to 40mm in one or two hours. Bickley, an eastern suburb of Perth, registered 41mm between midnight and 3am, 30mm of which fell in 42 minutes around 2am. For details of heavy falls, see Downpours. 24-hour totals to 9am were generally between 25 and 50mm southwest of a line from Perth to Albany, and between 10 and 25mm between that and a line from Geraldton to Esperance.

There were extreme variations in minimum temperature in the west this morning. Minima were more than 8C above average in SE WA ahead of the front, where Eyre and Balgair recorded 16 or 17C, 10.4 above. However, in the state's north and across the border in western NT, where the cold, dry airmass from last week's cold outbreak has lingered, minima dropped as low as 2.6 at Mandora on the NW WA coast, some 10.9C below average. Derby Airport's 7.7, at 9.3 below normal, was low enough to set a new August record for the station.

The strong pressure gradient across the southeast of the continent produced strong to gale force northwesterly winds east from SE WA to the NSW Snowy Mountains and south to TAS. Cape Willoughby on Kangaroo Island SA recorded a top gust of 100km/h and the summit of Mt Wellington TAS 115. Very warm air was ducted SE in a band a few hundred kilometres wide ahead of the front. In SE WA, most Goldfields and Eucla stations reported top temperatures of 27C, around 8 above normal, while several stations in SE TAS topped 20C. The top of 9C on the summit of Mt Wellington, accompanied by wind averaging 70 to 80km/h, gives an indication of the warmth and energy available in the lower atmosphere.

National weather extremes for today

Data provided by the Bureau of Meteorology

Records set this day (previous record and years of computerised record shown in brackets):
Lowest daily minimum temperature for August:
Western Australia:
003032 DERBY AERO 7.7 (8.7, 16)

Quality control note: Data is final. It includes late-received rainfall data and has been subject to BoM quality control checks.
Data is as received at 13:38EST, 03/03/2004.

Weather observations for today
Noteworthy  Weather         Capital  Cities         Regional  Cities       Alpine  Stations
Bureau of Meteorology Rainfall Bulletins and Weather Notes

Hottest
Highest maximum temperature>Greatest variation above normal maximum Highest minimum temperatureGreatest variation above normal minimum

32.3 KALUMBURU N Kimberley WA
32.3 KALUMBURU MISSION N Kimberley WA
32.1 OENPELLI N Rivers NT
32.0 JABIRU AIRPORT N Rivers NT
31.9 MANGO FARM N Rivers NT

+7.9   27.0 EUCLA Eucla WA
+7.7   19.5 CAPE BRUNY LIGHTHOUSE Southeast TAS
+7.4   20.4 DOVER Southeast TAS
+7.3   19.3 MAYDENA POST OFFICE Derwent Valley TAS
+7.1   20.0 GROVE RESEARCH STATION Southeast TAS
+7.1   20.1 BUSHY PARK (BUSHY PARK ESTATES) Derwent Valley TAS

24.6 COCOS ISLAND AIRPORT Islands ISL
23.1 TROUGHTON ISLAND N Kimberley WA
23.1 HORN ISLAND N Peninsula QLD
23.0 COCONUT ISLAND N Peninsula QLD
22.4 MCCLUER ISLAND N Rivers NT

+10.5   16.8 EYRE Eucla WA
+10.4   16.0 BALGAIR Eucla WA
+8.3   15.8 EUCLA Eucla WA
+8.3   11.0 GEEVESTON (CEMETERY ROAD) Southeast TAS
+7.3   13.0 PAYNES FIND E Gascoyne WA

Coldest
Lowest maximum temperatureGreatest variation below normal maximum Lowest minimum temperatureGreatest variation below normal minimum

2.2 MT HOTHAM Upper NE VIC
3.0 THREDBO AWS Snowy Mtns NSW
3.5 FALLS CREEK Upper NE VIC
4.0 MOUNT BULLER Upper NE VIC
5.5 PERISHER VALLEY SKI CENTRE Snowy Mtns NSW

-4.3   15.3 PAYNES FIND E Gascoyne WA
-3.8   28.9 KUNUNURRA AERO E Kimberley WA
-3.8   21.0 WALKAMIN DPI N Coast--Barron QLD
-3.2   30.5 WYNDHAM N Kimberley WA
-3.2   29.1 WARMUN E Kimberley WA
-3.2   11.8 MOUNT BARKER Lower West WA
-3.2   26.2 BURKETOWN POST OFFICE Gulf Country QLD

-7.5 WOOLBROOK (DANGLEMAH ROAD) NW Slopes S NSW
-7.2 ARMIDALE (UNI NEW ENGLAND) N Tablelands W NSW
-7.1 GLEN INNES AIRPORT AWS N Tablelands W NSW
-6.2 BOMBALA (THERRY STREET) Goulburn/Monaro NSW
-6.0 COOMA AIRPORT AWS Goulburn/Monaro NSW

-10.8   2.6 MANDORA E Pilbara WA
-9.0   -0.5 YUENDUMU N Plateau NT
-8.9   7.7 DERBY AERO W Kimberley WA
-8.9   -2.9 ALICE SPRINGS AIRPORT N Plateau NT
-8.8   -4.1 CESSNOCK AIRPORT AWS Hunter Valley NSW

Wettest Major City Extremes
Todays highest rainfall totals for the 24 hours to 9am. It includes the top 5 totals nationally followed by all reported falls of 50mm or more.

49.4 YOURDAMUNG LAKE Lower West WA
47.4 BALINGUP Lower West WA
46.6 BUSSELTON Lower West WA
46.4 PICKERING BROOK Lower West WA
46.4 PERIVALE ORCHARD Lower West WA

  Max+/- norm Min+/- normRain to 9am
BROOME AIRPORT 30.0 -0.3 7.0 -8.0 0.0
PERTH AIRPORT 16.8 -1.6 12.7 +4.7 20.0
ALBANY AIRPORT 13.0 -3.0 7.5 +0.1 36.4
KALGOORLIE-BOULDER AIRPORT 15.4 -3.0 12.3 +6.8 0.2
DARWIN AIRPORT 31.2 -0.1 19.1 -1.4 0.0
ALICE SPRINGS AIRPORT 25.6 +3.1 -2.9 -8.9 0.0
ADELAIDE (KENT TOWN) 16.7 +0.2 10.5 +2.3 0.0
MOUNT GAMBIER AERO 16.3 +2.3 7.5 +2.1 0.0
CAIRNS AERO 26.1 -0.4 17.5 +0.1 0.0
TOWNSVILLE AERO 26.7 +0.7 8.8 -5.9 0.0
ROCKHAMPTON AERO 24.6 -0.1 7.1 -3.5 0.0
AMBERLEY AMO 22.5 0.0 0.7 -5.7 0.0
BRISBANE AERO 21.0 7.8 0.0
ARMIDALE AIRPORT AWS 14.8 -2.4 0.0
COFFS HARBOUR MO 19.5 -0.2 6.5 -1.7 0.0
NEWCASTLE NOBBYS SIGNAL STATION AWS 20.5 +2.5 6.0 -3.2 0.0
SYDNEY (OBSERVATORY HILL) 21.0 +3.3 6.3 -2.6 0.0
PROSPECT DAM 21.4 +2.9 2.2 -4.6 0.0
WOLLONGONG UNIVERSITY 22.2 +4.0 4.7 -4.1 0.0
CANBERRA AIRPORT 15.2 +2.3 -1.8 -2.7 0.2
WAGGA WAGGA AMO 14.4 0.0 -1.3 -4.9 0.0
MILDURA AIRPORT 18.4 +1.3 3.1 -2.2 0.0
EAST SALE AIRPORT 20.1 +5.1 -0.8 -4.9 0.0
MELBOURNE REGIONAL OFFICE 16.2 +1.3 9.3 +2.7 0.0
LAVERTON RAAF 16.2 +1.4 8.1 +2.7 0.0
BALLARAT AERODROME 11.6 +0.2 3.8 +0.1 0.0
LAUNCESTON AIRPORT 13.4 +1.4 8.8 +5.8 1.6
HOBART (ELLERSLIE ROAD) 19.7 +6.7 10.0 +4.8 0.0

Downpours Gales & Gusts
High rainfall for periods of 6 hours or less. Highest wind gusts above 89km/h (storm force) or mean wind above 62km/h (gale force). Wind direction and mean windspeed shown in brackets.
WESTERN AUSTRALIA
    Lower West
PERTH AIRPORT
14.8mm in 1 hr to 02:30 14.8mm/h
19.0mm in 3 hr to 03:00 6.3mm/h
BADGINGARRA RESEARCH STN
15.0mm in 3 hr to 06:00 5.0mm/h
JANDAKOT AERO
13.8mm in 17 min to 01:30 48.7mm/h
19.4mm in 1 hr to 01:30 19.4mm/h
10.2mm in 28 min to 02:00 21.9mm/h
29.4mm in 1 hr to 02:00 29.4mm/h
14.2mm in 1 hr to 02:30 14.2mm/h
34.0mm in 3 hr to 03:00 11.3mm/h
ROTTNEST ISLAND
8.4mm in 8 min to 01:31 63.0mm/h
17.4mm in 1 hr to 02:00 17.4mm/h
20.0mm in 3 hr to 03:00 6.7mm/h
SWANBOURNE
11.2mm in 1 hr to 02:30 11.2mm/h
15.0mm in 3 hr to 03:00 5.0mm/h
BICKLEY
18.0mm in 16 min to 02:00 67.5mm/h
23.4mm in 1 hr to 02:00 23.4mm/h
11.8mm in 26 min to 02:26 27.2mm/h
16.6mm in 1 hr to 03:00 16.6mm/h
41.0mm in 3 hr to 03:00 13.7mm/h
GARDEN ISLAND HSF
15.0mm in 3 hr to 03:00 5.0mm/h
    SW & S Coast
CAPE NATURALISTE
21.0mm in 3 hr to 00:00 7.0mm/h
DWELLINGUP
24.0mm in 3 hr to 03:00 8.0mm/h
BUSSELTON
43.0mm in 3 hr to 00:00 14.3mm/h
MANJIMUP
28.0mm in 3 hr to 00:00 9.3mm/h
BUSSELTON AERO
27.0mm in 3 hr to 00:00 9.0mm/h
BRIDGETOWN
27.0mm in 3 hr to 00:00 9.0mm/h
ALBANY AIRPORT
24.0mm in 3 hr to 00:00 8.0mm/h
ROCKY GULLY
22.0mm in 3 hr to 00:00 7.3mm/h
MANDURAH
6.8mm in 9 min to 00:12 45.3mm/h
10.2mm in 1 hr to 01:00 10.2mm/h
15.0mm in 3 hr to 03:00 5.0mm/h
COLLIE EAST
11.0mm in 1 hr to 00:00 11.0mm/h
17.0mm in 3 hr to 00:00 5.7mm/h
    Gt Southern
KATANNING
13.2mm in 1 hr to 01:00 13.2mm/h
23.0mm in 3 hr to 03:00 7.7mm/h
WANDERING
18.0mm in 3 hr to 03:00 6.0mm/h

WESTERN AUSTRALIA
    Lower West
PEARCE RAAF : 89(320/ 69 ) at 01:49
ROTTNEST ISLAND : 109(330/ 80 ) at 00:00
OCEAN REEF : 100(320/ 78 ) at 01:38
SWANBOURNE : 95(320/ 67 ) at 01:00
BICKLEY : 100(310/ 43 ) at 01:04
GARDEN ISLAND HSF : 98(320/ 52 ) at 00:24
    SW & S Coast
CAPE LEEUWIN : 93(250/ 78 ) at 02:56
CAPE NATURALISTE : 85(250/ 63 ) at 02:00
ESPERANCE AERO : 82(260/ 63 ) at 03:52
MANDURAH : 100(280/ 63 ) at 00:03
    Eucla
FORREST : 82(320/ 63 ) at 12:03
SOUTH AUSTRALIA
    Kangaroo Is
CAPE WILLOUGHBY : 100(350/ 82 ) at 14:18
    Mt Lofty Ranges
MOUNT LOFTY : 93(330/ 63 ) at 10:00
NEW SOUTH WALES
    Snowy Mtns
THREDBO AWS : 76(320/ 67 ) at 23:00
VICTORIA
    Upper NE
MT HOTHAM : 89(340/ 72 ) at 23:00
    E Central
MELBOURNE AIRPORT : 96(360/ 70 ) at 22:30
FAWKNER BEACON : 89( 20/ 67 ) at 20:57
    W Coast
COLAC (MT GELLIBRAND) : 83(350/ 72 ) at 23:30
TASMANIA
    Southeast
MAATSUYKER ISLAND LIGHTHOUSE : 98(320/ 61 ) at 14:49
MOUNT WELLINGTON : 115(310/ 91 ) at 22:00
HARTZ MOUNTAIN(KEOGHS PIMPLE) : 91(280/ 50 ) at 14:19