The Bureau of Meteorology has issued a severe thunderstorm warning for NSW.
The storms are expected to hit the state’s central west, the north, and the south-east later on Wednesday afternoon.
It warned that large hail storms and heavy rainfall could hit the region.
The development of the situation was triggered by a trough that formed over the moist and unstable air mass.
It was expected to affect areas such as Grafton, Nepean, Kempsey, Mt Astute, and Newcastle. These storms could also generate damaging winds and heavy rainfall.
The State Emergency Service (SES) urged people to move their cars away from trees and away from power lines.
They were also told not to ride, walk, or drive through floodwaters.
The agency noted that people in areas such as Newcastle, Sydney, and Wollongong should be aware of the approaching storms
. The Bureau of Meteorology warned that a more severe thunderstorm warning would be issued if the storms reach these regions.