Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 406 AM EDT Sat Oct 10 2020 Valid 12Z Sat Oct 10 2020 - 12Z Mon Oct 12 2020 ...Hurricane Delta to track northeastward across Lower Mississippi/Tennessee Valley with destructive winds and dangerous flooding... ...Heavy rain to impact areas from the Lower Mississippi Valley to Central Appalachians this weekend... ...Rain and high-elevation snow for the Pacific Northwest to the Northern Rockies; record warmth continues for Great Plains... Hurricane Delta is forecast to weaken to a Tropical Storm then a Depression as it continues its trek across the Lower Mississippi Valley today. Heavy rain and scattered thunderstorms will lead to the potential for flash flooding across the Lower Mississippi/Tennessee Valleys and Southern Appalachians as well today. Rainfall totals between 1 and 3 inches are likely for much of that area. Delta will weaken to a Post-Tropical Cyclone on Sunday as it crosses into the Tennessee Valley. Some upslope enhancement along the Central/Southern Appalachians may contribute to higher rain totals for that region through Sunday. The interaction of a weakened Delta with an incoming surface front from the north may produce heavy rainfall for the Central Appalachians and Mid-Atlantic on Sunday. Meanwhile, an active pattern will include heavy rain and high elevation snow for the Pacific Northwest and Northern Rockies this weekend. A pair of low pressure systems are expected to produce 2-4 inches of rainfall across the Pacific Northwest while measurable snow may fall over the higher elevations. The primary system will move eastward and continue to put down rain and snow across the Northern Rockies through Sunday. As the upper-level trough that powers this system deepens it will generate rain and scattered to isolated thunderstorms for the Upper-Midwest on Sunday. A warm front will develop and strengthen as the upper-level trough deepens over the Great Plains this weekend. Temperatures across the area could see highs up to 20 degrees above average during this period. Many places across Texas, New Mexico and Oklahoma are forecast to break high temperature records this weekend as a result. Kebede Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php