Severe thunderstorm warnings were issued for Blue Mountains , the Hawkesbury and Sydney on Saturday afternoon . 'Large hailstones , heavy rainfall that may lead to flash flooding and damaging winds ' were forecast just after 3pm . Hails stones up to 2cm large were reported while social media users shared images of how the storm transformed various areas into snowfields . over 800 buildings , including five 200m long factories , have collapsed under half a metre of hail in western Sydney . State Emergency Services attended Seven calls for help , however the storm had cleared by 7pm .
Severe thunderstorm warnings were issued for Blue Mountains , the Hawkesbury and Sydney on Saturday afternoon . 'Large hailstones , heavy rainfall that may lead to flash flooding and damaging winds ' were forecast just after 3pm . Hails stones up to 2cm large were reported while social media users shared images of how the storm transformed various areas into snowfields . Seven buildings , including five 200m long factories , have collapsed under half a metre of hail in western Sydney . State Emergency Services attended over 800 calls for help , however the storm had cleared by 7pm .