Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 314 PM EDT Fri Nov 02 2018 Valid 00Z Sat Nov 03 2018 - 00Z Mon Nov 05 2018 ...Some severe weather will be possible along the Eastern Seaboard through the evening and overnight hours... ...Widespread rainfall with possible flooding is expected from the Mid-Atlantic to the Northeast through early Saturday... ...Widespread precipitation including rain and snow is expected tonight and into the weekend stretching from the Pacific Northwest to the Plains and Midwest... A slow-moving frontal-boundary extending from the Northeast into the Gulf of Mexico will be a focus for widespread rain and thunderstorms going through this evening along the Eastern Seaboard, and then continuing into early Saturday across the interior of the Northeast as a trailing cold front then sweeps offshore. Some of the thunderstorms this evening may be strong to severe, with the Storm Prediction Center continuing to highlight a Marginal Risk for severe weather from southeast New York and southern New England southward down across the Piedmont and coastal plain areas of the Mid-Atlantic, Southeast and into the Florida Peninsula. Heavy rain will also be a threat, especially along and ahead of an area of intensifying low pressure lifting north along the front from the Mid-Atlantic into the Northeast. These heavy rains may pose some flash-flooding concerns, with the Weather Prediction Center highlighting a Slight Risk for excessive rainfall from the Mid-Atlantic to New England. As the low lifts into Atlantic Canada and the front pushes offshore, expect the heavy rainfall and severe weather threat to end across the eastern U.S. by Saturday afternoon. However, much colder, windy and showery conditions, including some wet snow can be expected over the higher terrain of the central and northern Appalachians. The threat of strong winds has resulted in High Wind Watches being issued across areas of southeast New York and New England for Saturday. Farther west, a frontal system advancing southeast toward the Plains will continue to favor a rather widespread area of precipitation through tonight across the northern and central Rockies and the northern Plains. This will include some locally heavy snowfall, and there are Winter Weather Advisories, Winter Storm Watches and Winter Storm Warnings in effect locally across portions of the central and northern Rockies and over northeast Montana and western North Dakota. Strong gusty winds are also a concern across the mountains, with High Wind Warnings currently in effect for portions of the Rockies from western Montana to southern Wyoming. This system will advance east through the central Plains on Saturday and then reach the Midwest on Sunday with an expanding area of moderate to locally heavy rain. Sufficient cold air will be in place for some wet snow with this system as it arrives across northern Wisconsin and the arrowhead of Minnesota. Gradually a trailing cold front will sweep across areas of the southern Plains and the lower Mississippi Valley by late Sunday, but there will be numerous showers and thunderstorms impacting these areas as the front advances east. The Northwest U.S. will remain rather unsettled through the weekend as additional energy and moist northwest flow drops down from southwest Canada. Numerous showers are expected over the higher terrain of the Washington and Oregon Cascades and through the northern and central Rockies. This will include locally heavy accumulating snowfall. Elsewhere across the West, the weather will be very dry and warm, and this will enhance concerns for wildfire activity over especially California. Orrison Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php