As the active cells pass in the vicinity of the tower, the individual either hangs out in the tower cab on an insulated stool or bed( old school glass insulators as the feet on the legs) and stay off of the radio, or they just leave the cab/ tower completely to a residence or lower floor.
After the cell passes or deemed safe they will return to the cab and scan for smokes.
Same yet different uses for the term “downstaff” … Momentarily or seasonally.