Two rain events Eastern Australia 22 to 25 August 2016

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NEnswrainfallWed

Sydneyrainto9am

Cloudmass

As per the forecast models, two rain events unfolded across eastern and south eastern Australia during the period. The first event had its greatest impact upon the North East inland of New South Wales around the Tamworth and Narrabri regions.

In this regard, healthy rainfall of 26 to 35 mm fell across the agricultural region. The highest totals to 9 am 23/8/2016 were at:-

Narrabri - 39 mm.
Caroda and Palaroo - 37 mm.
Mulla Crossing (Near Tamworth) - 35 mm.

The second event of Wednesday was much stronger which included the development of a short lived east coast low. Much of coastal New South Wales was wet and moderate to even heavy falls occurred. For the 24 hours to 9 am 24/8/2016, the heaviest falls fell across the Richmond / Tweed region of the state where falls of 50 mm to 99 mm were common. The heaviest falls included:-

Palen Creek Alert - 108 mm.
Loadstone - 103 mm.
Dairy Flat - 90.
Mullumbimby - 78 mm.
Terania - 77 mm.

During Wednesday, substantial falls fell around the Sydney and Illawarra region although the coastal areas had the heavier falls than the inland regions. The heaviest falls fell around the central suburbs near Strathfield and Homebush Bay where 60 mm fell. The heaviest falls to 9 am 25/8/2016 included:-

Sydney Olympic Park - 62 mm.
Campsie - 60 mm.

A large region around Sydney Harbour had 50 to 60 mm and much of Sydney's west had 30 to 50 mm. Interestingly only 13 mm fell at Mona Vale being the lowest figure for the city.

Some flooding impacts occurred and there was one flood rescue in Scholfields (NW Sydney) and it appears a man was swept into Leycester Creek near Kyogle and not seen again during the event.

The satellite photo of eastern Australia for Wednesday (Himawarri) is showing an extensive cloud mass affecting mostly New South Wales and into southern Queensland. Very little affected Victoria. The cloud moved offshore rapidly which lead to rapid clearance of the system overnight Wednesday and into Thursday morning.

CREDITS

Bureau of Meteorology for rainfall figures and satellite photo.

Rain events South East Australia August 22 to 25 2016

Published by:

NSWRainevent

Eastcoastlow

Inlandcloud

Weather models are presently suggesting a rain event to unfurl across a large portion of south east Australia over coming days.

When analysed, it appears that this will occur in two bursts with the first one passing across northern New South Wales and southern Queensland during Monday / Tuesday with the second one passing through New South Wales, Queensland and north east Victoria during Wednesday.

The second event appears to be more substantial in which an inland low will develop across Queensland and New South Wales then cross the coast near Sydney before tracking south east then moving away as an east coast low.

Combined, the two events are expected to deliver healthy rainfalls across North East New South Wales where 30 to 120 mm could potentially fall.

The development of an east coast low south of Sydney appears interesting as there is potential for falls upwards of 120 mm within an area from Wollongong to Ulludulla on the New South Wales south coast and Illawarra region.

Models are likely to vary again as the system develops but it is one system to watch with interest.

The attached satellite photo (Himawarri) and dated 21 August 2016 is showing the development of the cloud mass that forms the weather system to pass through south east Australia in coming days. A feature of this is that there were thunderstorm activity across the Alice Springs region Sunday morning. The cloud mass seen will build further as it tracks further east and influence the weather in coming days.

CREDITS

Bureau of Meteorology for satellite image and synoptic chart for 24 August 2016.
Weatherzone - Rainfall model for week 22 to 28 August 2016.

Heavy rain event New South Wales 1 to 4 August 2016

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NSW7Dayrain

Sydneyrain

CoffsHarbourrain

NENSWRain

During the first week of August 2016, a strong rain event crossed through much of New South Wales delivering significant rainfalls across some areas of the state.

Early in the week, the system passed through Southern New South Wales and North East Victoria producing some localised flooding around the town of Wangaratta. While only 29 mm fell around town, the combination of heavier rainfall across the highland areas to the south east and coupled with a wet May to July period, the event was enough to cause some flooding near and within town.

Albury Airport had 24.8 mm, Rutherglen 27.6 mm, Dartmouth had 37 mm and Hunters Hill had 38 mm. The rain was mainly light to steady rain of long duration.

As the system crossed through New South Wales and the coast, a more significant drenching occurred across some areas. During Tuesday, Oberon had 41.5 mm Orange had 43.6 mm, Bathurst 44.8 mm and Armidale had 49.8 mm.

As the system passed through Sydney, some northern suburban areas received significant falls. For the 24 hours to 9 am 4/8/16, 61 mm fell at Observatory Hill and 63 mm fell at Chatswood. For the same period, a weather station at Strathfield received 90 mm being the highest for Sydney.

As the system crossed the coast and developed into an east coast low, some very heavy rainfall occurred on the New South Wales Mid North Coast and around Coffs Harbour.

The heaviest falls from the event fell around Coffs Harbour and the hills to the west. Meldrum to the west of Coffs Harbour was swamped with 239 mm followed by 214 mm at Middle Boambee. Bellingen had 167 mm and Woolgoolga had 161 mm.

This turned out to be a significant rain event for August across some areas of the state as shown. The rainfall plots from the Bureau of Meteorology “Water and the Land” are provided showing where the heaviest falls fell during the event.

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