Sunday 09 MAY 2004

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2004

Dec

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January

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Strong front brings rain and disruption to SW WA

The surface chart for 2pm WST around the time the front crossed Perth. The parent Low had deepened by 10hPa over the past 12 hours, but steadied at around 980hPa for the next 24 hours as it tracked slowly east along the south coast dragging a succession of troughs across the Southwest. The system weakened late Monday before heading off to the SSE. BoM
Radar returns at 9.20am WST show a 150km-wide rainband arriving on the Perth coast but already well into the far SW. The heavy showers at the rear of the band arrived in the metro area around noon and were accompanied by squally winds gusting to 82km/h at Perth Airport and 104km/h at Ocean Reef. BoM
The rain map for the week ended Tuesday 11 May captures all the rain that fell during this event. Most fell from the rainband that preceded the first front. While there were good falls along most of the west coast, the slow movement of the low before it moved off to the south kept winds solidly from the west, robbing the Wheat Belt and South Coast east of Albany of any worthwhile rain. BoM

Strong front brings rain and disruption to SW WA

A frontal system moved into southern WA today bringing welcome rain, but also gales, power failures, local flooding, minor property damage and traffic and shipping disruption.

The rain was heaviest in the Central West, Lower West and Southwest Coasts since early July 2003 with many locations recording more in the 3 days to 11 May than they had in the preceding 7 months. In the hour to 1pm, Perth Airport registered twice the rainfall recorded in the five months from December 2003 to April 2004. Among the highest falls for the week ended 11 May, all in the Lower West and Southwest, were:

108.0 DWELLINGUP
105.8 WELLINGTON MILL ALERT
100.8 JARRAHWOOD
100.2 WELLINGTON MILL
92.1 NANNUP
90.0 WITCHCLIFFE
82.0 FERGUSON VALLEY
79.4 FOREST GROVE
77.2 ROLEYSTONE
76.4 COWARAMUP
72.8 ACTON PARK
72.0 ASTON DOWNS TBRG
71.3 BOYANUP
70.4 PICKERING BROOK
69.0 BEDFORDALE
69.0 BUSSELTON
66.8 WANNEROO
65.2 KARNET
64.6 DARDANUP
63.2 JINDONG
63.0 BUSSELTON SHIRE
63.0 BUSSELTON AERO
63.0 HENTY BROOK
62.4 LEEMAN
61.2 BICKLEY
61.0 BRUNSWICK JUNCTION
60.6 KARRAGULLEN NORTH
60.6 PINJARRA

In the Central West, Eneabba topscored with 47.2mm.

Torrential rain fell just ahead of the front giving many places from just north of Perth to Busselton around 20mm in 1 hour and around 30mm in 3 hours (see Downpours below). Busselton Airport recorded 24.6mm in the hour to 11am and Perth Airport the same amount in the hour to 1pm. Flash flooding was reported in northwestern suburbs of Perth.

Gale force squally winds accompanied the front and moderated only slightly behind it in the strong westerly stream. Ocean Reef, 25km NW of Perth CBD, and Cape Leeuwin both reported peak gusts of 104km/h, while heavy seas and wind gusting to 84km/h on Rottnest Island stopped most ferry services for the day. Trees were blown onto a car in Perth and there were numerous weather-related accidents. Powerlines were damaged from Geraldton to Albany cutting power to about 6,000 homes. Darlington, 20km east of Perth, was worst affected with about 2,000 homes without power until late evening or early Monday. The SES attended about 100 callouts in Perth and elsewhere, mostly to deal with roof flooding caused by blocked gutterings and wind-damaged roof tiles. Minor damage was reported from tree branches blown onto a few houses and sheds, and a house in Wonnerup, 8km ENE of Busselton, had part of its roof blown onto an adjacent house.

The strong westerly component in the wind, which continued after the passage of the front, meant that rain was confined to the Central and Southwest Coasts . But while the rain ran out of puff east of the Darling Range, the wind didn't and widespread severe dust storms were reported from the Great Southern, the Wheat Belt and the Central West. The observer at Ongerup reported less than 100m visibility at 3pm while at Lake Grace, 100km north, visibility was only 500m at both the noon and 3pm observations. A football match at Kukerin, 20km west of Lake Grace, had to be abandonned when dust reduced visibility to a few metres and players could no longer see the ball. WAFarmers president Trevor De Landgrafft told the West Australian that dust storms had caused some erosion where farmers had burnt stubble ready for cropping but rain had not been enough for seeding to begin. ABC Radio reported that early sown canola and lupin crops were blown out of the ground, paddocks blown bare of topsoil and fences toppled against the weight of built up debris and sand.

Maximum temperatures ahead of the front in SE WA were 9 to 12 above average with Eyre, Balladonia and Esperance all topping 30°.

National weather extremes for today

Data provided by the Bureau of Meteorology

Records set this day: (none known)

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 22:17EST, 27/10/2004.

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

41.9 CENTURY MINE Gulf Country QLD
36.6 BURKETOWN AIRPORT Gulf Country QLD
36.5 WYNDHAM AERO N Kimberley WA
36.5 KALUMBURU MISSION N Kimberley WA
36.5 JABIRU AIRPORT N Rivers NT

+11.6   32.8 EYRE Eucla WA
+11.1   31.8 BALLADONIA Eucla WA
+10.1   29.6 SALMON GUMS RES.STN. Goldfields WA
+9.8   30.2 ESPERANCE Lower West WA
+9.2   29.8 KALGOORLIE-BOULDER AIRPORT Goldfields WA

28.0 NORTHERN ENDEAVOUR Islands ISL
26.9 TROUGHTON ISLAND N Kimberley WA
26.9 COCONUT ISLAND N Peninsula QLD
26.0 MCCLUER ISLAND N Rivers NT
26.0 WILLIS ISLAND Islands ISL

+8.3   21.2 TOORAK RESEARCH STATION Gulf Country QLD
+8.3   20.3 URANDANGIE Northwest QLD
+7.2   20.1 WINTON POST OFFICE Northwest QLD
+6.9   16.6 PAYNES FIND E Gascoyne WA
+6.7   18.0 WINDORAH POST OFFICE Channel Country QLD

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

0.9 MT HOTHAM Upper NE VIC
1.2 MOUNT WELLINGTON Southeast TAS
3.5 CHARLOTTE PASS (KOSCIUSKO CHALET) Snowy Mtns NSW
3.8 FALLS CREEK Upper NE VIC
4.0 THREDBO AWS Snowy Mtns NSW

-4.1   1.2 MOUNT WELLINGTON Southeast TAS
-4.0   11.4 BOWRAL (PARRY DRIVE) Illawarra NSW
-3.9   7.6 LAKE LEAKE (ELIZABETH RIVER) E Coast TAS
-3.4   12.4 ORFORD POST OFFICE E Coast TAS
-3.3   12.0 FINGAL (LEGGE STREET) E Coast TAS
-3.3   10.2 PORT ARTHUR (PALMERS LOOKOUT) Southeast TAS
-3.3   11.8 BULL BAY (LAURISTON) Southeast TAS

-2.6 FALLS CREEK Upper NE VIC
-2.4 MT HOTHAM Upper NE VIC
-2.2 LAKE LEAKE (ELIZABETH RIVER) E Coast TAS
-1.0 KEITH (MUNKORA) Mallee/Upper SE SA
-1.0 NHILL Wimmera N VIC
-1.0 MOUNT WELLINGTON Southeast TAS

-7.0   -1.0 NHILL Wimmera N VIC
-6.5   1.2 KEITH Mallee/Upper SE SA
-6.4   1.0 GRIFFITH AIRPORT AWS Riverina W NSW
-6.0   0.9 NARRANDERA GOLF CLUB Riverina E NSW
-5.9   2.1 WILCANNIA (REID ST) Far Northwest NSW
-5.9   1.5 HILLSTON AIRPORT Riverina W 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.

30.0 BABINDA POST OFFICE N Coast--Barron QLD
28.8 YARRAS (MOUNT SEAVIEW) MidNorth Coast S NSW
28.8 MUNGAR JUNCTION Brisbane/SE Coast QLD
28.6 TEWANTIN RSL PARK Brisbane/SE Coast QLD
28.0 POINT LOOKOUT Brisbane/SE Coast QLD

  Max+/- norm Min+/- normRain to 9am
BROOME AIRPORT 33.6 +2.1 22.1 +3.9 0.0
PERTH AIRPORT 24.6 +3.0 13.4 +3.0 0.0
ALBANY AIRPORT 26.0 +7.1 10.5 +0.7 0.0
KALGOORLIE-BOULDER AIRPORT 29.8 +9.2 13.2 +4.6 0.0
DARWIN AIRPORT 34.7 +2.7 24.0 +1.9 0.0
ALICE SPRINGS AIRPORT 26.2 +3.2 9.2 +0.9 0.0
ADELAIDE (KENT TOWN) 19.1 +0.2 9.8 -0.4 0.0
MOUNT GAMBIER AERO 17.1 +1.0 3.7 -3.6 0.4
CAIRNS AERO 29.0 +1.4 22.3 +2.5 0.0
TOWNSVILLE AERO 28.3 +0.7 21.2 +3.6 0.0
ROCKHAMPTON AERO 27.4 +1.5 14.6 +0.4 0.0
AMBERLEY AMO 24.3 +0.4 13.5 +3.3 6.4
BRISBANE AERO 24.0 13.8 10.4
ARMIDALE AIRPORT AWS 19.3 4.7 0.0
COFFS HARBOUR MO 22.7 +1.4 11.3 -0.5 0.0
NEWCASTLE NOBBYS SIGNAL STATION AWS 20.2 +0.3 13.6 +1.7 0.0
SYDNEY (OBSERVATORY HILL) 19.7 +0.4 13.6 +2.1 0.0
PROSPECT DAM 19.6 -0.5 12.7 +2.5 0.0
WOLLONGONG UNIVERSITY 17.8 -2.2 13.7 +1.8 0.0
CANBERRA AIRPORT 18.1 +2.7 6.5 +3.3 0.0
WAGGA WAGGA AMO 21.4 +4.2 1.3 -4.7 0.0
MILDURA AIRPORT 19.3 +0.4 3.0 -4.5 0.0
EAST SALE AIRPORT 17.8 +1.0 8.6 +2.3 0.0
MELBOURNE REGIONAL OFFICE 18.3 +1.7 7.9 -0.7 0.0
LAVERTON RAAF 16.4 -0.3 8.8 +1.1 0.6
BALLARAT AERODROME 14.8 +1.2 7.5 +1.7 0.0
LAUNCESTON AIRPORT 12.4 -1.6 1.1 -3.5 0.0
HOBART (ELLERSLIE ROAD) 11.6 -2.8 8.9 +2.0 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
6.0mm in 13 min to 12:30 27.7mm/h
15.8mm in 30 min to 13:00 31.6mm/h
24.6mm in 1 hr to 13:00 24.6mm/h
29.0mm in 3 hr to 15:00 9.7mm/h
PEARCE RAAF
9.0mm in 45 min to 13:45 12.0mm/h
10.6mm in 1 hr to 14:00 10.6mm/h
15.0mm in 3 hr to 15:00 5.0mm/h
JANDAKOT AERO
4.4mm in 13 min to 11:49 20.3mm/h
11.8mm in 1 hr to 12:30 11.8mm/h
GINGIN AERO
9.8mm in 51 min to 13:46 11.5mm/h
SWANBOURNE
11.2mm in 1 hr to 12:00 11.2mm/h
PERTH METRO
13.6mm in 30 min to 12:30 27.2mm/h
20.6mm in 1 hr to 12:30 20.6mm/h
18.4mm in 1 hr to 13:00 18.4mm/h
23.0mm in 3 hr to 15:00 7.7mm/h
BICKLEY
9.8mm in 28 min to 13:00 21.0mm/h
13.6mm in 1 hr to 13:00 13.6mm/h
9.4mm in 53 min to 13:53 10.6mm/h
29.0mm in 3 hr to 15:00 9.7mm/h
CAPE LEEUWIN
6.6mm in 16 min to 10:23 24.8mm/h
DWELLINGUP
8.4mm in 20 min to 12:21 25.2mm/h
8.0mm in 39 min to 13:00 12.3mm/h
26.0mm in 3 hr to 15:00 8.7mm/h
BUSSELTON
18.8mm in 34 min to 10:34 33.2mm/h
29.0mm in 3 hr to 12:00 9.7mm/h
BUSSELTON AERO
5.6mm in 4 min to 10:33 84.0mm/h
8.2mm in 4 min to 10:37 123.0mm/h
24.6mm in 1 hr to 11:00 24.6mm/h
29.0mm in 3 hr to 12:00 9.7mm/h
WITCHCLIFFE
5.8mm in 16 min to 10:16 21.8mm/h
2.2mm in 1 min to 10:17 132.0mm/h
16.0mm in 3 hr to 12:00 5.3mm/h
JARRAHWOOD
38.0mm in 6 hr to 15:00 6.3mm/h
MANDURAH
6.0mm in 11 min to 11:33 32.7mm/h
QUEENSLAND
    N Coast--Barron
CAPE FLATTERY
12.2mm in 1 hr to 04:00 12.2mm/h
    Northwest
WINTON AIRPORT
16.0mm in 3 hr to 18:00 5.3mm/h
    Wide Bay/Burnett
SANDY CAPE LIGHTHOUSE
15.0mm in 3 hr to 21:00 5.0mm/h
NEW SOUTH WALES
    Illawarra
JERVIS BAY (PT PERPENDICULAR AWS)
16.4mm in 1 hr to 06:00 16.4mm/h
24.0mm in 3 hr to 06:00 8.0mm/h

WESTERN AUSTRALIA
    Lower West
PERTH AIRPORT : 82( 10/ 65 ) at 11:35
ROTTNEST ISLAND : 87(360/ 65 ) at 11:30
OCEAN REEF : 104(360/ 58 ) at 11:21
CAPE LEEUWIN : 104(310/ 72 ) at 16:00
CAPE NATURALISTE : 96(330/ 59 ) at 09:44