Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 PM EDT Tue Oct 15 2019 Valid 00Z Wed Oct 16 2019 - 00Z Fri Oct 18 2019 ...Flash flooding possible from the Lower Mississippi Valley to Southeast through Tuesday night... ...Developing coastal storm to bring heavy rain and strong winds to the Northeast late Wednesday into Thursday... ...Colder than average temperatures spreading to the central and eastern U.S. Wednesday and Thursday, with above normal temperatures across the Great Basin and Rockies... A low pressure system moving slowly eastward across the Great Lakes region will sweep a cold front across the central to eastern U.S. through Wednesday. Another front, currently located along the central Gulf Coast into the Southeast, will lift slowly northward through Wednesday morning. Rain and some thunderstorms are expected to focus along both these fronts. In the Lower Mississippi Valley to Southeast, rain could be heavy enough to produce some flash flooding through Wednesday morning as moisture levels are high. As upper-level energy consolidates on Wednesday, these systems are forecast to develop into a strong coastal low and bring heavy rain of 1 to 3 inches and high winds to the Northeast by Thursday. Meanwhile, a series of upper-level impulses moving through the West will lead to a series of fronts pushing through the Pacific Northwest through the period, and chances for lower elevation rain and higher elevation snow. One front is expected to survive and move through the Great Basin and Rockies by Thursday, and rain and snow showers are possible there. Temperature-wise, the cold front advancing through the central and eastern U.S. will lead to below normal high temperatures across the Plains to Mississippi and Ohio Valleys on Wednesday, spreading to the Eastern Seaboard on Thursday. Farther west, above average temperatures are forecast through the Southwest, Great Basin, and Rockies on Wednesday and into the High Plains on Thursday. Highs in the upper 70s and 80s on Thursday in the Central High Plains will be 15 to 20 degrees above average. However, temperatures will drop across the West Coast into the Northern Great Basin by Thursday behind the aforementioned cold front. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php