A setup very similar to the tornado event last week is in store for the western Dakotas again this afternoon and evenings, as a potent trough ejects from the Northern Rockies.  There are a few MCSs across the central Dakotas early this afternoon, but they should move east and die allowing for strong heating in their wake.  Ahead of this trough, the LLJ is forecast to increase above 30 knots by 21z and increase steadily through evening as the boundary layer decouples.  Supercells will develop in extreme eastern MT and move east into this incredibly unstable and sheared environment by late afternoon into evening.  I typically trust the RUC wind fields most with these Northern Plains setups, but the thermodynamics have been out of control on the RUC all season long, so we can probably divide the 0-1 km EHIs by a factor of at least 2.  I'm still grinding out the dissertation or I'd already be in position west of Dickenson!  It is a little weird watching these events unfold from home...  I'm not used to this!!!  Click on "more" for the 16z RUC 850 mb flow and EHIs at 00z this evening.