Crj-200 first officer as the pilot monitoring; reports being issued a low altitude alert by lga towe...

Narrative:

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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

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.

Attributes
ACN	1251338
Time
Date	201504
Local Time Of Day	0601-1200
Place
Locale Reference	LGA.Tower
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 200 ER/LR (CRJ200)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Events
Anomaly	Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

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.