Most dominating feature today is a coastal low along the east coast. It will work slowly north bringing a few days of cloudy - wet weather to East. A front moving out of The Rockies will bring wet weather to the Plains...with another system in the Pacific NW. Below - weather map depicting the above.
Below....amount of rainfall projected today.
Above - projected temperatures for this Saturday. Summer from Texas to Mid Atlantic....late winter for Rockies and Upper Midwest. Be safe.