Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

AMERICAN · FLIGHT AA 1812 LANDED 8:09 AM ET, ~9 MIN LATE · SCHEDULED TIME UNKNOWN

AA 1812 · RDU → LGA

took off 7:03 AM ET · landed 8:09 AM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 15h after departure

Odds over time

Arrive at LGA more than 15 minutes late?
31% chance · ±0 pts +2 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 10% 20% 30% 40% 16h 12h 6h Departs Lands