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 563 LANDED 3:03 PM PT, ~26 MIN LATE · SCHEDULED TIME UNKNOWN

WN 563 · SMF → SEA

took off 1:26 PM PT · landed 3:03 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 6h after departure

Odds over time

Arrive at SEA more than 15 minutes late?
46% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 20% 40% 60% 80% 12h 6h Departs Lands