A severe thunderstorm warning for large hailstones and damaging wind has been issued for parts of the Hunter.
The Bureau of Meteorology has also issued the warning for parts of the Mid North Coast, Central Tablelands, North West Slopes and Plains, Central West Slopes and Plains and Northern Tablelands Forecast Districts.
The State Emergency Service advises that people should:
*Secure or put away loose items around the house
*Keep clear of fallen power lines
*Stay indoors away from windows, and keep children and pets inside as well.
For emergency help during floods and storms, ring the SES on 132 500.