More active weather is expected across the nation Saturday. A low pressure system moves into central Canada and pushes a strong trough into the Upper Midwest and Great Lakes.
Flow around the trough will push warm and moist air northward from the Gulf of Mexico, thus creating a warm front that will kick up scattered showers and thunderstorms throughout the day. Rainfall totals will range around an inch, with up to 2 inches in areas of strong thunderstorms. At the same time, the back side of this system will pull a cold front through the northern and central plains. There is a slight chance that severe storms will develop along this front. Flooding will remain of concern across the north-central U.S.
Meanwhile, a slow-moving front will linger over the East Coast. The warm and moist system will allow for more showers and thunderstorms to develop, but it will shift south over the Mid-Atlantic and Southeastern states. Additionally, an area of low pressure in the eastern Gulf of Mexico will push in ample moisture. This will create more heavy rain and severe storms over Florida. Rainfall totals may reach up to 3 inches in some areas.
In the West, monsoon moisture over the Southwest brings more thunderstorms to the Four Corners. Flash flooding will remain a threat. Further west, a trough of low pressure over the West Coast will bring slightly cooler temperatures to California and the Pacific Northwest. Temperatures in the Lower 48 states Friday have ranged from a morning low of 34 degrees at Meacham, Ore., to a high of 104 degrees at Granbury, Texas.