A lot of weather going on from coast to coast through the weekend including a developing tropical system in the Gulf of Mexico. 

Potential Tropical Cyclone Sixteen will begin in the western part of the Gulf of Mexico today and as is heads northeast it is expected to become either a Tropical or Subtropical storm later today as it approaches the eastern Gulf Coast. If named it will become Nestor. This system will bring heavy rain, isolated tornadoes, and strong winds to the southeast possibly as early as late tonight, and then likely on Saturday. It continues into the Mid-Atlantic region on Sunday and could affect areas along the southern New England coast by Sunday evening or overnight including Long Island and New York City, and maybe even as far north as Boston. 

Further west the pacific Northwest will be active with rain showers and high elevation snows with some accumulations. 

By Sunday a surface low develops in the northern Plains bringing widespread rain to the Dakotas and scattered showers and storms to NE during the day. This activity will build east into Sunday evening and overnight with rain in MN, IA, WI, and the UP of MI, and showers and storms with heavy rain potential to MO, southeast KS, northeast OK, AR, and southern IL.