Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 323 AM EDT Sat Oct 24 2015 Valid 12Z Sat Oct 24 2015 - 12Z Mon Oct 26 2015 ...Heavy rain and flash flooding will continue throughout the Southern Plains, Mississippi Valley, and Southeast... The axis of heavy rain that impacted north and central Texas will shift toward the coast on Saturday and into Saturday night. As a cold front begins to drop across South Central Texas early Saturday morning, the heaviest rainfall amounts will concentrate along the boundary. By Saturday evening, this cold front will push southward and eventually stall along the middle and upper Texas coast as a surface low begins to migrate northeastward along the coastline. By Saturday night and into Sunday, both of these features will provide plenty of focus for heavy rainfall. Though the stationary front will remain draped across south and southeast Texas, the heavy rain will shift into western Louisiana by Sunday afternoon as the surface low tracks eastward and will continue along the Gulf Coast. With these conditions in mind, flash flooding will be a threat across Texas and into the Deep South and portions of the Mississippi/Tennessee Valley. See the WPC excessive rainfall products for more information. A line of showers and thunderstorms will continue to move across the Great Lakes and Ohio/Tennessee Valley on Saturday as the northern half of the aforementioned cold front moves through these regions. By Saturday night, showers will taper off the Upper Great Lakes region and will begin to move into New England and Mid-Atlantic. These showers are expected to quickly progress eastward as high pressure builds over the East Coast. The Pacific Northwest will begin to see light to moderate rain mostly along the coast by Sunday morning as a deep upper level low moves toward the region. This upper low will continue to push across the Pacific Northwest throughout Sunday. Consequently, showers will move farther inland across both the Pacific Northwest and Intermountain West. Fanning Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php