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.

ENVOY · FLIGHT MQ 4156 LANDED 4:49 PM CT, ~10 MIN LATE · SCHEDULED TIME UNKNOWN

MQ 4156 · GRB → ORD

took off 4:09 PM CT · landed 4:49 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 5h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
36% chance · ±0 pts +10 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% 1.1d 12h 6h Departs Lands