June 12th took us to southeast Montana for day 1 of Tour 6. Good moisture, instability and shear would combine with upslope flow into the higher terrain of southeast Montana to develop an HP supercell. This storm tracked southeast and produced a mostly rain wrapped tornado north of Alzada near Albion, MT. Look closely in the photos and you can make out the tornado. It officially received an EF1 rating by the NWS in Billings.

2011, June 2011, Montana, supercell, tornado