Apologies for what undoubtedly was not a pleasant start to your friend's trip.
279 had to divert to IND
for 29 minutes to add fuel due to the line of thunderstorms that snuck up on MDW
ATA's policy is to offer the next available TZ
flight as reprotection to customers inconvenienced by weather/ATC. MDW
usually follows policy but they have been known to deviate.
The weather was pretty rough here tonight. Our 7:59P flight was close to blocking out when the MDW
ground stop was implemented. The flight left at 9:57P after we waited for the FAA to lift the GS
and for the weather to pass overhead so it was safe to board and depart.
Hope your friend enjoys his stay in TOL