Compared to most of the summer, the new few days will be pretty quiet weatherwise for the majority of the country. There still is a threat for severe storms in parts of the Midwest, isolated storms in the south and east, and dangerous heat from the desert southwest northward through much of NV and CA.
First, a cold front will be draped from the southern Plains to New England early today and will propagate south and east through the weekend. Storm activity is expected to be isolated for the most part associated with this front with nothing major anticipated. These chances will be from the southern Plains to the Northeast today, then mainly from south TX to the eastern Carolinas and southward from tonight through the weekend.
As for the severe storm threat, that could begin as early as late Saturday evening in far eastern SD/southwest MN and then build east during the overnight through southern MN and northern IA, into southern and central WI and northern IL Sunday morning and afternoon, and then into lower MI, northern IN, northwest OH Sunday afternoon and night.
Finally, a heatwave will be in place across western AZ, much of CA, and much of NV where heat advisories and excessive heat warning will be in effect through the weekend in parts of these areas as widespread highs in the 100s and 110s are expected through the weekend.