Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 353 AM EDT Sun Sep 30 2018 Valid 12Z Sun Sep 30 2018 - 12Z Tue Oct 2 2018 ...Heavy rain for the Desert Southwest and the Great Lakes region... Heavy rainfall is set to make a return to much of Arizona and eastern California by Monday as Hurricane Rosa tracks towards the northeast and reaches the region in a much weaker form in terms of wind. However, there will be enough deep layer moisture to support widespread 1 to 2 inch rainfall amounts through Monday night, with more likely falling thereafter and extending farther inland across the Intermountain West. Flash flood watches are currently in affect for many of those areas. Another area that will likely get significant rainfall over the next couple of days will be from Iowa to Michigan. Rain with embedded thunderstorms are forecast to develop over parts of the Upper Midwest that will expand eastward across the Great Lakes going into Monday, which will be associated with a surface low tracking eastward along a nearly stationary frontal boundary. Farther west across the northern Rockies and northern plains, this same boundary is expected to result in some light rain and high elevation snow across Montana. Additional rainfall is likely over western Washington state as a plume of Pacific moisture surges inland across that region ahead of a surface low. D. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php