Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Landed in Emergency Condition; Flight Crew Diverted
Aircraft
At FL280 10 minutes into cruise we received an Right 14th Duct Warning EICAS master warning. Radios were transferred to the flying Pilot; the FO. I performed the QRH for R 14th stage duct warning. The QRH required R 14th stage bleed closed and if message remained enunciated after 40 seconds then to retard the effected thrust lever to idle. The warning message persisted so the R thrust lever was brought to idle thrust and diversion to the nearest suitable airport was planned. We complied; advised ATC; contacted dispatch and maintenance while searching for suitable airports with long dry runways; and favorable weather conditions as we were surrounded by thunderstorms that we had been navigating through. We requested vectors to the [diversion] airport. Checklists were performed; Flight attendant briefing; and passenger announcements and notifications were made. Dispatch re-released us to divert and were given fuel burn numbers to [the diversion airport]. Landing numbers were obtained and the aircraft was configured for a flaps 20 landing. Extra time was required for a proper abnormal landing briefing so we requested delay vectors and were given a series of right turns to return to the final approach course. Landing was made normally and without incident. We taxied to a gate that had been prepared for our arrival and passengers were deplaned after a short while once we pulled into the gate. Dispatch and Maintenance were contacted by phone and crew was debriefed by Chief Pilot and were returned to duty status. A recover flight was sent so we could continue with Passengers to our original destination.
CRJ200 Captain reported experiencing a 14th stage duct EICAS master warning at FL280. QRH procedures were not effective and the crew elected to divert to the nearest suitable  airport.