A front traversing the Plains and upper Mississippi Valley will be Sunday's main weather event. Moisture associated with the front will gradually taper off during the day though rain and thunderstorms will persist from eastern Colorado through Minnesota and Wisconsin.
Elsewhere, typical summer afternoon thunderstorms will develop in the Southeast, particularly Georgia and South Carolina.
A low pressure system will slowly approach the West Coast, continuing the cooling trend for the West Coast after a warm week previous. Monsoon-like moisture in the Southwest will continue to threaten that area with scattered afternoon thunderstorms.
Parts of drought-ravaged southern Texas may get some showers, but barely a drop of what's needed.
Temperatures in the Northeast will rise into the 80s and 90s, and into the 90s and 100s in the Southeast. Temperatures in the Southern Plains and the Southwest will rise into the 90s and 100s, and into the 80s in the Northwest.
Temperatures in the lower 48 states ranged from a morning low of 26 degrees Saturday at Stanley, Idaho, to a high of 109 degrees at Shawnee, Okla.
Weather Underground: http://www.wunderground.com
National Weather Service: http://iwin.nws.noaa.gov