Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 407 PM EDT Fri Oct 07 2016 Valid 00Z Sat Oct 08 2016 - 00Z Mon Oct 10 2016 ...Hurricane Matthew continues its northward path along the Southeast U.S. coast.... ...Heavy rain possible for the Pacific Northwest... Currently, Hurricane Matthew is moving along the northeast coast of Florida and will continue its northerly trek along the Georgia and South Carolina coast tonight and through Saturday. Although the intensity of Matthew will weaken, this storm will produce high winds and heavy rainfall. There is a risk for isolated tornadoes along the South Carolina coast and a small portion of GA/NC's coast. For more information on that, see the Storm Prediction Center. A high risk of flash flooding will be possible along the coast from northern Florida through South Carolina tonight through Saturday. By Sunday afternoon, the center of Matthew will begin to curve eastward away from the North Carolina coast; as a result, expect rainfall to taper off throughout Sunday. For more information on specific threats associated with Hurricane Matthew along with its most current track and intensity, see the National Hurricane Center (www.hurricanes.gov). In addition to the heavy rainfall threat across the Southeast, moderate to heavy rainfall will also be possible along the central Appalachians as southeasterly flow transports moisture from Matthew into the upslope regions. As an incoming cold front moves across the Mid-Atlantic, dry air will follow and coverage of precipitation will dwindle across the region. A multi-day precipitation event is ongoing across the Pacific Northwest and the northern Rockies. A boundary will be draped across the regions from the Pacific Northwest to the central Plains. Onshore flow will continue to bring moisture across the region--creating a good set up for heavy rainfall. The axis of heavy rainfall can be expected along the Olympic range/Washington State Cascades in addition to the northern Rockies. There could be light accumulating snowfall in the highest elevations of the Cascades on Sunday. Fanning Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php