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.

SOUTHWEST · FLIGHT WN 2181 LANDED 9:50 PM ET, ~1 MIN EARLY · SCHEDULED TIME UNKNOWN
Yesterday

WN 2181 · BWI → JAX

took off 8:20 PM ET · landed 9:50 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 2h after departure

Odds over time

Arrive at JAX more than 15 minutes late?
23% chance · ±3 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% 1.2d 1d 12h 6h Departs Lands