B737-800
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Flight Crew Became Reoriented; Flight Crew Returned To Clearance; Flight Crew Took Evasive Action
Human Factors; Weather
Cleared for the [LGA] ILS Rwy22 circle to land Rwy13 in night VMC. FO was pilot flying. As we turned in on final for RWY 13 and started our approach descent; the strong undershooting crosswind caused us to be left of centerline. I was looking outside the aircraft to maintain sight of airport when we received a GPWS Warning-Caution Obstacle. I looked in and saw how low and left of course we were. I told the FO to level and correct back to centerline. We continued the approach.Suggestions: Better monitoring of the approach. We had properly planned and briefed the approach.
[Report narrative contained no additional information].
B737-800 flight crew received a GPWS 'Obstacle' warning when they deviated from charted procedure on a night visual approach to LGA.