Regarding the noise this past Saturday 3/14/15, I just noticed this message come up in the WebTrak application I posted a link to above:
- LGA
Runway 13/31 will be closed on 3/14/15 from 6:00 AM to 6:00 PM for monthly runway repairs and construction subject to air traffic control needs and weather conditions.
I guess they fixed the runway early, since the noise was only in the morning as far as I can recall.