Source: Bureau of Meteorology

For people in Hunter, Metropolitan, Illawarra, South Coast, Central Tablelands, Snowy Mountains and parts of Southern Tablelands, North West Slopes and Plains, Central West Slopes and Plains and South West Slopes Forecast Districts.

Issued at 11:03 pm Tuesday, 18 February 2020.

Severe thunderstorms are likely to produce large hailstones, heavy rainfall that may lead to flash flooding and damaging winds over the next several hours in the Hunter, Metropolitan, Illawarra, Central Tablelands and parts of the Southern Tablelands, North West Slopes and Plains and Central West Slopes and Plains districts. Locations which may be affected include Newcastle, Gosford, Sydney, Wollongong, Nowra, Orange, Goulburn and Dubbo.

Severe thunderstorms are likely to produce large hailstones, heavy rainfall that may lead to flash flooding and damaging winds over the next several hours in the South Coast, Snowy Mountains and parts of the South West Slopes districts. Locations which may be affected include Eden, Bega, Cooma, Bombala, Tumbarumba and Khancoban.

111 km/h gust at North Head 12:00am

104 km/h wind gust at Fort Denison at 11:45pm

102 km/h wind gust recorded at Richmond Airport at 10:20pm

91 km/h wind gust recorded Nowra Airport at 8:40pm

27.4mm of rain in 30min at Orange (Agricultural institute) to 8:45pm

Reports of large hail near Mittagong and Wollongong.104 km/h wind gust at Fort Denison at 11:45pm

102 km/h wind gust recorded at Richmond Airport at 10:20pm

91 km/h wind gust recorded Nowra Airport at 8:40pm

27.4mm of rain in 30min at Orange (Agricultural institute) to 8:45pm

Reports of large hail near Mittagong and Wollongong.

The State Emergency Service advises that people should:
* Move your car under cover or away from trees.
* Secure or put away loose items around your house, yard and balcony.
* Keep at least 8 metres away from fallen power lines or objects that may be energised, such as fences.
* Report fallen power lines to either Ausgrid (131 388), Endeavour Energy (131 003), Essential Energy (132 080) or Evoenergy (131 093) as shown on your power bill.
* Trees that have been damaged by fire are likely to be more unstable and more likely to fall.
* Keep clear of creeks and storm drains.
* Don't walk, ride your bike or drive through flood water.
* If you are trapped by flash flooding, seek refuge in the highest available place and ring 000 if you need rescue.
* Be aware that run-off from rainfall in fire affected areas may behave differently and be more rapid. It may also contain debris such as ash, soil, trees and rocks.
* After bushfires, heavy rain and the loss of foliage can make the ground soft and heavy, leading to a greater chance of landslides.
* Unplug computers and appliances.
* Avoid using the phone during the storm.
* Stay indoors away from windows, and keep children and pets indoors as well.
* Stay vigilant and monitor conditions. Note that the landscape may have changed following bushfires.
* For emergency help in floods and storms, ring the SES (NSW and ACT) on 132 500.