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 4049 LANDED 12:33 PM ET, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 4049 · STL → CLE

took off 10:27 AM CT · landed 12:33 PM ET (scheduled time unknown)
Forecast issued Mon 12:00 PM ET · 1h after departure

Odds over time

Arrive at CLE more than 15 minutes late?
9% chance · ±0 pts +3 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 3% 6% 9% 12% 1.0d 12h 6h Departs Lands