The Macleay needs to brace itself for a severe thunderstorm expected to hit this afternoon, according to the Bureau of Meteorology.
More than 20mm of rain is expected to fall this afternoon and winds are predicted to become northwest to northeasterly at a rate of 15 to 25 km/h.
A large area of NSW is expecting rain and possible storms, with the Kempsey Shire expected to be one of the hardest hit.
The weather predictions are a part of a much anticipated cool change which should flush the majority of the heat from the state.
The temperature remains hot with a maximum temperature of 33 degrees expected today, according to Weatherzone.
The weather is expected to improve tomorrow as the temperature drops and the rain eases, as 1-5mm of rainfall is expected on Thursday.
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