Flood Watch Information

Weather Warnings

The Bureau of Meteorology have advised that a low-pressure system that formed off the southern Queensland coast is crossing over the South Coast. Damaging wind gusts and wind-driven large sea waves have developed along the southern parts of the coast. The rain rate should ease from this afternoon, although steady rainfall will still continue. Weather warnings have been issued as follows:

Flood Watch

Lake Tabourie was opened out to sea yesterday afternoon. Water levels reached 1.18mAHD last night and currently is at 1.01m AHD and falling. Given the current swell conditions, it may take a couple of days for the water level to stabilise.

In relation to Shoalhaven Heads, Council undertook a survey of the berm yesterday afternoon. The highest point on the berm is » 1.5m AHD (see attached survey), which is below the emergency trigger. However, the backhoe and operator are on standby as a precautionary measure.

The following tables summarises current water levels and rainfall (at 8:40am today) in key Council managed lake and river entrances. Flooding still may occur in regardless of the entrance conditions in these locations due to catchment runoff.

Table 1 – Water level summary at key locations

Location

Water Level (m AHD)

Entrance Condition

Monitoring Status

Get ready level (m AHD)

Emergency opening level(m AHD)

Lake Conjola

0.65 (tidal)

Open

Monitor

0.8

1.2

Burrill Lake

0.83 (tidal)

Open

Monitor

0.85

1.2

Lake Tabourie

1.01

Open

Monitor

0.85

1.17

Shoalhaven Heads (Shoalhaven River)

0.08 (tidal)

Heavily shoaled. Level of entrance berm below emergency trigger (see previous email for attached survey).

Monitor

1.5

2.0

Table 2 – 24-hour Rainfall Summary at key locations

Gauge Location

24-hour Rainfall Totals (mm)

Broughton Creek

106

Foxground

133

Greenwell Point

104

Nowra

99

Kangaroo Valley

76

Wattamolla

150

Currarong

95

Vincentia

73

Tomerong

123

Lake Conjola

102

Fishermans Paradise

117

Porters Creek Dam

133

Ulladulla

128

Burill Lake

90

Lake Tabourie

136

Brooman

179

Elevated water levels in open lakes and rivers open to sea are expected with the predicted swell conditions. Fortunately tide levels is predicted not to be excessive over the coming days (ranging from 1.3 to 1.5m).

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