A lot of active weather is expected across the country in the next few days as fronts, troughs, and even a tropical system produce showers and a few storms with heavy rainfall possible.
First, in the Southeast, a stationary front will be draped across the Gulf Coast states through much of the weekend along with a trough in place. Scattered showers and storms are likely associated with these features in the Gulf Coast states through the Southeast and north to the Ohio and Tennessee Valleys and MId-Atlantic states.
Next, another trough and a slow-moving cold front will affect parts of the Central Plains and into the Midwest. Showers will be likely around and along the front. Heavier showers will be possible beginning overnight into Saturday morning from eastern NE to Northern WI/UP of MI, and by Saturday evening this activity will reside from northeast KS to Northeast WI. On Sunday an area of low pressure is expected to develop in the Great Lakes producing more widespread showers and storms for southern and eastern WI, northern IL, northern IN, northern OH, lower MI, and the UP of MI.
Finally, Tropical Storm Kay will continue to move north near the western coast of Baja California, Mexico, and will get to just off the Southern California coast near San Diego potentially the next couple of days and will bring Scattered showers and storms with heavy rainfall and windy conditions to parts of the Southwest US, especially Southern California. Some of this activity will affect AZ, southwest UT, and southern NV. Some flooding will be possible as there are Flood Watches beginning this afternoon for Southern California, far west AZ, and extreme southern NV.