Oct 3 (Reuters) - QBE Insurance Group Ltd QBE.AX :
* Hurricanes market update
* QBE has increased its 2017 large individual risk and catastrophe claims allowance
* Group has increased its 2017 allowance for large individual risk and catastrophe claims to $1.75bn
* There is a pre-tax impact to earnings of about $600m
* Group's 2017 combined operating ratio target range now moves to 100.0%-102.0%