Since it's early June, it's important to keep in mind that you can still have over performing setups, especially across the Northern Plains, northwest flow events across the Midwest, and terrain-induced supercells east of the front range all the way up into Montana. It's important to monitor the location of embedded mid-level perturbations, the extent and placement of moisture, and associated lifting mechanisms at the surface but I've had some of my best chases within otherwise mediocre mid and upper-level patters.
So while we may not be getting massive troughs that yield synoptically evident severe weather outbreaks, there may still be plenty of opportunities in June for those able to capitalize on severe weather mechanisms coalescing across climatiologically favorable areas. I suspect we still have several days in June where Colorado and perhaps Southern Wyoming will reward, and hardly a year goes by without a spectacular supercell or three across Eastern Montana into the Western Dakotas. Canada is also back open for business this year for those with passports.
June typically rewards but it sometimes takes patience and picking the right setups.