Thursday, July 31, 2014

River Derwent flood warning update

Australian Government Bureau of Meteorology Tasmania

RENEWED WARNING

MINOR FLOOD WARNING FOR RIVER DERWENT

Issued at 8:07pm on Thursday 31 July 2014
by the Bureau of Meteorology, Hobart

Flood Warning Number: 2

Minor flooding is now occurring in the middle reaches of the River Derwent and below Meadowbank Dam following heavy rain across the catchment in the past three days.

High levels of minor flooding will develop into the lower reaches around Macquarie Plains and New Norfolk late Thursday evening into Friday.

Strong river rises will continue in the Ouse river with levels expected exceed the minor flood level (2.4 metres) about Ashton overnight Thursday.

Strong river rises expected to continue overnight Thursday into Friday along the River Derwent. Storages in the Derwent system are quite full with several dams currently spilling. An additional 20 to 30 mm of rainfall are possible in the reminder of Thursday into Friday.

Derwent above Ouse River
Strong river rises have been recorded in the majority of the upper River Derwent. At Glendhu the Derwent River is now above the Minor Flood Level (4.0 metres) and rising. Minor flooding to continue overnight Thursday into Friday.

Ouse River
Strong river rises will continue in the Ouse river with levels expected exceed the minor flood level (2.4 metres) about Ashton overnight Thursday. River levels are expected to remain near but below minor flood level at Ouse township.

Clyde River
Small river rises remaining below the Minor Flood Level.

Below Meadowbank Dam
High levels of minor flooding are expected to develop in the Lower River Derwent below Meadowbank Dam late Thursday. Strong river rises will occur about Macquarie Plains with river levels expected to approach the Minor Flood Level (4.0 metres) overnight Thursday.

Tyenna River
River levels in the middle Tyenna River peaked Thursday morning and are now easing. Localised flooding in adjacent creeks and surrounding low lying areas in the lower Tyenna River about Westerway to continue overnight Thursday into Friday.

Styx River
River levels in the upper Styx catchment peaked early Thursday morning above the Minor Flood Level and are now easing. Localised flooding in adjacent creeks and surrounding low lying areas in the lower Styx River around Bushy Park and Glenora expected to continue overnight Thursday and Friday.

New Norfolk
Strong river rises will occur about New Norfolk overnight Thursday with river levels expected to peak above the Minor Flood Level (2.0 metres) late Friday morning. Tidal variation at New Norfolk may produce localised flooding in adjacent creeks and surrounding low lying areas of the River Derwent early Friday morning, well in advance of the arrival of the main flood peak.

Predicted River Heights/Flows - Based on observed and forecast rainfall, the following river peak heights are predicted:

Ouse River at Ashton 2.6 - 2.9 m (MINOR) late Friday morning, 01/08/2014

Ouse River at Ouse 3.4 - 3.6 m (BELOW MINOR) early Friday afternoon, 01/08/2014

River Derwent below Meadowbank Dam 5.5 - 5.8m (MINOR) early Friday morning 01/08/2014

River Derwent at Macquarie Plains 4.6 - 4.9m (MINOR) early Friday afternoon 01/08/2014

River Derwent at New Norfolk 2.0 - 2.4m (MINOR) late Friday afternoon 01/08/2014


FloodSafe advice is available at www.ses.tas.gov.au.

Road closure information is available at www.police.tas.gov.au

For emergency assistance call the SES on telephone number 13 25 00.

For life threatening situations, call 000 immediately.

Weather Forecast: Showers, chance of thunderstorms.

Next Issue: By 9AM on Friday 1 August 2014

Latest River Heights:
Location Height of River Date/Time of Observation
Derwent River below Lk St Clair 2.39m steady 07:05 AM THU 31/07/14
Ouse River at Ashton 1.55m rising 07:00 PM THU 31/07/14
Clyde River at Bothwell 0.48m steady 06:00 PM THU 31/07/14
Derwent River below Meadowbank Dam 4.82m rising 07:00 PM THU 31/07/14
Derwent River at Macquarie Plains 3.25m rising 07:16 PM THU 31/07/14
TYENNA RIVER AT NEWBURY 1.7m steady 06:15 PM THU 31/07/14
STYX RIVER AT BRUCES BRIDGE 2.05m falling 07:11 PM THU 31/07/14
Derwent River near Bryn Estyn 3.36m steady 06:00 PM THU 31/07/14
DERWENT RIVER AT NEW NORFOLK 1.45m falling 07:24 PM THU 31/07/14

For the latest rainfall and river level information see www.bom.gov.au/tas/flood/

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