Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 257 PM EDT Thu Nov 01 2018 Valid 00Z Fri Nov 02 2018 - 00Z Sun Nov 04 2018 ...Severe weather threat continues across portions of the east-central Gulf Coast states today shifting toward the East Coast through Friday... ...Widespread rainfall with possible flooding expected from the eastern Gulf Coast to the Ohio Valley and Northeast... ...Another round of heavy rainfall expected early Friday morning for the Pacific Northwest... A frontal boundary extending from the Northeast to the central Gulf Coast will continue to be associated with active weather in the eastern U.S. heading into the weekend. An ongoing threat for severe storms is present ahead of the frontal boundary along the central/eastern Gulf Coast region but the severe threat is forecast to wane through tonight. During the day on Friday, the Storm Prediction Center has a Marginal Risk of severe thunderstorms in place from portions of northern Florida to the Mid-Atlantic region, lower than the threat that was associated with significant severe weather in the lower Mississippi Valley Wednesday night, but still an area worth monitoring. Low pressure along the frontal boundary will track through the Ohio Valley into the Northeast tonight with periods of moderate to heavy rain spreading from the upper Ohio Valley into New York and New England. A second area of low pressure is forecast to develop along the front in North Carolina/Virginia Friday evening while the initial low in the Northeast weakens. The secondary area of low pressure in the Mid-Atlantic region should intensify through Saturday morning while tracking toward New England. This secondary low will be tied to a renewed round of heavy rain, embedded thunderstorms and possible flooding along with increasing winds over the Northeast late Saturday as the surface low deepens. One to three inches of rain (locally higher) can be expected from near Washington D.C. through eastern New York and northern New England with the higher totals more likely near Maine where the frontal boundary will be slow to clear the region. Given the expected rainfall, flash flood and flooding concerns are warranted from portions of the eastern Gulf Coast into the Northeast, with the threat ending from southwest to northeast with time. Out West, rainfall ahead of a Pacific cold front will impact the Pacific Northwest with locally heavy rainfall possible into the Olympics, Coastal Ranges and Cascades of Oregon and Washington late tonight through Friday morning. Steady precipitation will move into the Interior Northwest during the day on Friday with snow expected for the higher elevations of Idaho, Montana and Wyoming. The greatest potential for totals over a foot will be in northwestern Wyoming through Saturday morning. A second cold front is expected to near Washington late in the day on Saturday through Sunday morning bringing a second round of potentially heavy rain to the region for the second half of the weekend. Otto Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php