Narrative:

On left downwind for runway 24 going into roa we began experiencing moderate turbulence at about 8;000 feet. We were cleared to descend to 4;000. Being an airport with terrain in all quadrants; I asked for vectors outside of the final approach fix of hiban on the RNAV 24. Approach complied and vectored us onto the downwind and turned us base approximately 3 nm outside hiban. We had all of the terrain and the field in sight and relayed that to the controller. We were then cleared to turn direct the field and I turned to a heading that was close to direct and would allow us to intercept the approach course. Runway 24 has no PAPI or VASI nor does it have an ILS so my only form of vertical guidance came from the GPS 'snow flake'. We were at 4;000 in the turn direct and received an egpws terrain warning. It was visual and we had the terrain in sight and I was intercepting the final approach course and starting a slow descent to the FAF altitude of 3;700 feet. I disengaged the autopilot and followed the approach course and the vertical guidance to the runway. About a snow flakes width high just inside the FAF we received our second egpws warning. Again in visual conditions well clear of terrain I elected to continue to an albeit very turbulent but normal landing. Wind shear advisories were in effect and surface wind was 260/24/37.in hindsight perhaps the moderate turbulence and shearing wind contributed to the egpws warnings. All terrain was in sight and well cleared and in no way was the aircraft in any sort of undesired state nor was safety compromised. Additionally while turning base to final there is rising terrain on the opposite side of the approach course by several miles and perhaps the forward looking functions sensed that hill based on the turn to final. Moving forward; I intend to fly the full approach to runway 24 to avoid the left base just outside hiban.

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Original NASA ASRS Text

Title: Air Carrier Captain reported receiving two EGPWS terrain warnings on a visual approach to ROA Runway 24. Reporter continued the approach to landing because terrain was in sight.

Narrative: On left downwind for Runway 24 going into ROA we began experiencing moderate turbulence at about 8;000 feet. We were cleared to descend to 4;000. Being an airport with terrain in all quadrants; I asked for vectors outside of the final approach fix of HIBAN on the RNAV 24. Approach complied and vectored us onto the downwind and turned us base approximately 3 nm outside HIBAN. We had all of the terrain and the field in sight and relayed that to the Controller. We were then cleared to turn direct the field and I turned to a heading that was close to direct and would allow us to intercept the approach course. Runway 24 has no PAPI or VASI nor does it have an ILS so my only form of vertical guidance came from the GPS 'snow flake'. We were at 4;000 in the turn direct and received an EGPWS terrain warning. It was visual and we had the terrain in sight and I was intercepting the final approach course and starting a slow descent to the FAF altitude of 3;700 feet. I disengaged the autopilot and followed the approach course and the vertical guidance to the runway. About a snow flakes width high just inside the FAF we received our second EGPWS warning. Again in visual conditions well clear of terrain I elected to continue to an albeit very turbulent but normal landing. Wind shear advisories were in effect and surface wind was 260/24/37.In hindsight perhaps the moderate turbulence and shearing wind contributed to the EGPWS warnings. All terrain was in sight and well cleared and in no way was the aircraft in any sort of undesired state nor was safety compromised. Additionally while turning base to final there is rising terrain on the opposite side of the approach course by several miles and perhaps the forward looking functions sensed that hill based on the turn to final. Moving forward; I intend to fly the full approach to Runway 24 to avoid the left base just outside HIBAN.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.