Medium Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Weather / Turbulence
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Took Evasive Action
Human Factors; Procedure
On vectors 6 SM northwest of TRI airport at 4500; ATC was vectoring us around weather for the approach. We were level; given a left turn from 270 to 090. On about a 180 heading; we got the GPWS 'caution terrain' followed by 'terrain terrain woop woop pull up' one time. I leveled the wings and executed the terrain escape maneuver. We climbed up to 5;300 feet from 4;500 feet. As soon as I started the escape maneuver; the indications went away. We notified ATC and flew the approach without disruption. This seemed like an erroneous activation as we were above what ATC said was the MVA. But; it was night; so not 100% sure.Either a false warning or a terrain clearance issue. It seemed that we were too high to get this in a level turn. ATC indicated we were 100 feet above their MVA. Responded and leveled the wings and executed the escape maneuver. Suggest to fly at or above MSA rather than the minimum vectoring altitude.
Air carrier Captain reported receiving a GPWS alert while being vectored for the approach.