Warren County remains in the grip of an arctic blast that has brought single-digit temperatures and made the start of 2014 among the chilliest ever.The plunge into the deep freeze will be short-lived as forecasters are calling for a return to normalcy with highs climbing back into the 50s later this week. That return, however, may be just a brief respite before another arctic blast in mid-January.As for the question of how low did it go, the answer would be minus 1. The temperature dipped below zero during the pre-dawn hours Tuesday morning and had only climbed to 11 degrees by 11 a.m. Tuesday morning.