The Bureau of Meteorology on Monday afternoon announced a warning for Tamworth, Gunnedah, Armidale, Moree and Narrabri.

For the next few hours, the Bureau says thunderstorms are likely to produce damaging winds and large hailstones in the area.

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 on 131 388, or Endeavour Energy on 131 003 or Essential Energy on 132 080, as shown on your power bill. 
* Unplug computers and appliances. 
* Avoid using the phone during the storm. 
* Stay indoors away from windows, and keep children and pets indoors as well. 

For more information, visit the weather bureau’s website.