Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Troubleshooting; Confusion
Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Separated Traffic; Flight Crew Returned To Clearance
Weather
I was working PO and Aircraft X was landing RWY 27L.  Aircraft Y was landing RWY 28 and started to make a right turn into Aircraft X.  I instructed Aircraft X to climb immediately to 4;000.  I was not able to turn Aircraft X to the right; because there was traffic landing RWY 26R that they would have conflicted with that aircraft; and there was insufficient time to coordinate with the PV controller to break their aircraft out.I would strongly recommend the discontinuation of triple arrivals during periods of weather.  There were numerous reports of 20 knot wind shear; and convective weather west and north of the airport; along with moderate weather on final.
The pilot flying was locked in on the PRM 28 (ATL) approach and progressing nicely when we encountered rain; moderate turbulence; and airspeed fluctuations that ultimately kicked us into CWS mode.  We had previously queried the controllers about the arrival into ATL and were told not to expect anything more than light chop and some rain.  Unfortunately; within seconds we were in a turn to the right putting us in the NTZ. We recognized the mode selection and started to turn back when the Controllers told us to turn to a heading of 180 and climb to 3;000 feet.  (We were about 2;800 feet at the time.)  It was all very quick and we believe weather definitely played a role.  After our arrival; loads of complaints about the ride; wind shear warning and microbursts were heard over the radio.
Pilot and controllers report of a scenario while running tripps to a set of runways; an aircraft is bounced off curse by winds and because of close proximity to other traffic is pulled out and resequenced.  Controllers advise that tripps should not be run in bad weather just for this reason.