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 3993 LANDED 4:24 PM CT, ~8 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 3993 · BWI → BHM

took off 3:52 PM ET · landed 4:24 PM CT (scheduled time unknown)
Forecast issued Tue 5:00 PM ET · 1h after departure

Odds over time

Arrive at BHM more than 15 minutes late?
26% chance · ±1 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% 12h 6h Departs Lands