A severe thunderstorm warning is in place for parts of central west NSW, the Blue Mountains region, Gosford/Wyong and Sydney areas, with large hailstones, damaging wind and heavy rainfall expected.
The warning applies to those people in the Central Tablelands, Central West Slopes and Plains and parts of Hunter, Illawarra, Southern Tablelands, North West Slopes and Plains, South West Slopes.
The Bureau of Meteorology said Orange, Tamworth, Gunnedah, Dubbo, Parkes, Yass and Tarlga may be affected and people in those areas should stay inside.
Further east, another warning is in place with Richmond, Windsor and Riverstone, Hornsby, Calga and Gosford all expected to be hit between 7.00pm-7.30pm.
“There is potential of giant hailstones and locally destructive winds with our larger thunderstorms,” meteorologist Olenka Duma said.
This afternoon, Mudgee, in the central west, received 33 millimetres in just half an hour and Merriwa, in the upper Hunter shire, was hit by gusts of 114 kilometre per hour.
“Thunderstorms are likely to move toward the coast with a few rumbles and showers expected to the Illawarra through to the southern parts of the mid-north coast,” Ms Duma said.
Overnight the storm activity is expected to ease but will likely re-develop tomorrow morning or afternoon leading to more storms over eastern parts of NSW, the BOM said.