Precipitation is expected in New England, FL, the upper Midwest, and the Southwest.
First, a front will hang around from New England south to FL. Early showers and a few storms will be from eastern NY south to the NJ coastline and will move east and should mainly be offshore by midday Saturday. A weak low-pressure system develops on Saturday along this front and the result will be redeveloping showers that will move westward back onshore and possibly getting as far west as eastern NY again. Further south scattered showers and storms are expected in central and southern FL through the weekend. A lot of these areas could get over an inch of rainfall through the weekend with higher totals in the 2-5 inch range in ME and over 2 inches in far southern FL.
Next, a trough of low pressure will move through the Upper Midwest today and Saturday, then into New England on Sunday producing scattered showers and maybe a couple of storms. The majority of this activity should be light, but a few showers could be heavy due to lake enhancement with cooler temperatures moving over the warmer lakes.
Finally, a cut off low will meander around the southwestern US the next few days and will bring isolated to scattered showers and a few storms to much of AZ, southwest NM, Southern CA, and possibly far southern NV, and some of this activity could make it to southern UT and southwest CO by Sunday.