Wednesday, July 20, 2011
StormTrack: July 20: Tornadic Storm in Roseau, MN
Discussion... RUC has evolved storm nicely in the 12z run. RUC projects cell to move over US/Canada border and out of NWS responsibility area in the next couple hours.
Analysis indicates STP and SCP parameters aren't impressive in the cell in question, but EHI and CAPES are sufficient for tornadic thunderstorms.
This couplet of winds as seen above is interesting, and we will continue to watch it as it moves towards the Canadian border.