A frontal boundary dipping into the Southwestern U.S. will help concentrate heavy showers and strong thunderstorms through the weekend and into next week. Severe storms will be possible along and east of the Southern Rockies, while flash flooding will present a threat from the Plains into the Four Corners.
As the frontal boundary taps into increasing moisture and warm temperatures, severe storms are likely to organize along and east of the Front Range, with storms tracking into the Plains. Storms already have a history of producing very large hail up to near softball sized hail in Eastern Colorado.
A tornado or two will be possible in Colorado, from Denver to the southeast into western Kansas. More large hail will be likely with additional storms.
Afternoons look active the next few days as storms initiate over the mountains before moving east from the late afternoon through the evening. Storms may persist overnight in the Plains, feeding on warm air and gulf moisture.
Downpours could be heavy enough to create flash flooding from Arizona to Kansas. Avoid low lying areas if a flash flood warning is issued for your area, or seek higher ground if you're in a flood prone location.