Regional Jet 200 ER/LR (CRJ200)
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Company Policy; Human Factors; Procedure; Airport
Coming into LGA; we were given the expressway visual. We were told to report the towers. I; the pilot monitoring; told ATC we had the towers in sight. We were then cleared for the expressway visual and told to cross them at 2;500 feet. We complied and then made the base turn at 1;000 feet per the guidance on the briefing page. I then asked approach if we were to switch over to tower; he said yes. Switch to tower.Once I switched I heard tower saying our call sign; I have a low altitude alert on you. I responded 'correcting'. The Tower then cleared us to land. We were stable and on glidepath according to the snowflake. The pilot flying then corrected his glide path to above the snowflake. We landed without incident.The expressway visual to 31 in LGA is a threat. The pilot flying did a great job configuring early. When flying this approach I will stay above the snowflake guidance.
CRJ-200 First Officer as the pilot monitoring; reports being issued a low altitude alert by LGA Tower during the base turn on the Expressway Visual to Runway 31. The Captain was following the 'snowflake' and the approach did not seem low to the crew.