Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Situational Awareness
Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Weather / Turbulence
Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Chart Or Publication; Human Factors; Manuals
We were cleared onto a visual approach to RWY 31. I had the RNAV 31 approach loaded into the box. I had the radar up on my screen and the FO (First Officer) up on terrain on his MFD. This was because we were [avoiding thunderstorms and heading] to an airport that is classified as a mountainous airport. The FAF was listed at 2200 feet so I selected 2200 feet and started a descent from 4000 feet on the downwind leg of our approach where we were cleared for the visual approach. I had briefed the approach and the largest obstacle was to the north. The listed MSA was 3500 feet. I did notice the towers depicted on the chart at 1865' close to our position. As I descended somewhere around 2400 feet we got a caution obstacle alert from the GPWS. I immediately clicked off the autopilot and turned to a base leg and stopped our descent. We visually saw the towers; after the alert; and landed without further issue. There is not much information listed on the company pages. There should be an alert added to these pages in regards to these towers.
Air Carrier Captain reported receiving a GPWS obstacle alert on a visual approach to MDT.