EMB ERJ 170/175 ER/LR
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Inflight Event / Encounter Weather / Turbulence
Flight Crew Regained Aircraft Control
Weather
Encountered severe turbulence while in descent on the GLASR1 arrival. Approximately 25 miles NNE of GLASR. Encounter was from 26;500 to 20;000 feet. Aircraft in lead reported moderate turbulence at 26;500 and we encountered almost immediately. Aircraft had drastic changes in altitude and roll and heading deviations upwards of 30 degrees. No overspeeds occurred. Autopilot never disengaged even though drastic movements of the control column were observed. We had already slowed to 270 KIAS before anything more than continuous light turbulence was encountered. We further slowed to 250 at the onset of the continuous aggressive moderate. No injuries indicated from the FAs (Flight Attendants). One FA and a passenger that had exited the lavatory could not stand and therefore chose to sit on the floor and ride out the experience. Reported to Maintenance; Dispatch and recorded in the maintenance log. On walkaround no apparent issues seen in regards to the aircraft condition. Appeared to be as it should. We had knowledge of the potential for turbulence in the area and were prepared for the possibility. The encounter with severe conditions was sudden and unexpected. Any suggestions or recommendations from leadership is always welcome.
ERJ-175 Captain reported severe turbulence event.