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 3758 LANDED 9:43 PM CT, ~4 MIN LATE · SCHEDULED TIME UNKNOWN

WN 3758 · BNA → MEM

took off 9:07 PM CT · landed 9:43 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 0h before departure

Odds over time

Arrive at MEM more than 15 minutes late?
28% chance · ±2 pts −5 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.0d 12h 6h Now Departs