I made a change to reflect the potential severe in Colorado this afternoon. While hail and winds are possible in Eastern Colorado today, very heavy rains and flooding concerns are the main threat today. Storm motion expected to be less than 10kts will make for storms sitting over one area for a long time dumping copious amounts of rain. Denver's morning AFD mentions this as a threat mainly from a line from Denver to Greeley eastward, however, storms/terrain interaction could lead to some serious issues in mountain canyons and mountain towns. Also, if a slowe moving, heavy rain producing storm moves over the Urban Corridor, we could see some extreme problems in various metro areas today.
I'm not sure I'd be chasing Colorado today for chasable weather (slow storm motion is nice, but severe may be hard to find), but I would definately try my luck in the Panhandles, maybe as far north as Southern Kansas for tornadoes.