Some ensembles are hinting at SW mid/upper-level flow going into next week. First chances are Mon/Tues with a weaker western trough possibly ejecting out into the northern plains. Another trough is forecast to develop later in the week but now some members are cutting-off the low from the mean flow. If it would eject out next weekend sometime (9/21-9/23) it could bring a favorable setup for severe storms on the plains. Will post updates if it looks like a chase may occur within the next week or so.