Interesting that they're cancelling CoEx flights tomorrow at IAH. Last I saw, windspeed at IAH was down to 10 mph, with "gusts" in the low 20s. RJs usually need somewhat better weather conditions than larger jets to operate, but it seems doubtful that conditions would be too rough for them tomorrow. I guess they didn't want to risk ferrying the aircraft back this evening (wind conditions were definitely gustier a few hours ago).