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 477 LANDED 7:00 PM ET, ~2 MIN EARLY · SCHEDULED TIME UNKNOWN
Yesterday

WN 477 · SRQ → BWI

took off 5:02 PM ET · landed 7:00 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 5h after departure

Odds over time

Arrive at BWI more than 15 minutes late?
20% chance · ±0 pts −4 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% 1.1d 12h 6h Departs Lands