Introduction

This article provides a general overview for controllers of typical scenarios involving loss of separation (LOS) during weather avoidance. It offers suggestions to help controllers provide as much support as possible to the aircraft concerned and considerations for maintaining the safety of other aircraft in the vicinity of the potential conflict. In the context of this article, the term ‘weather avoidance’ is used to describe actions taken by a pilot to circumnavigate weather considered to be hazardous, such as a Thunderstorm, Cumulonimbus (CB) or Towering Cumulus (TCU) cloud and the severe turbulence and hail which may be associated with them.