Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 237 AM EST Tue Nov 10 2020 Valid 12Z Tue Nov 10 2020 - 12Z Thu Nov 12 2020 ...Record breaking warmth to impact eastern third of the country... ...Heavy snow for Cascades, Northern Rockies and Upper Midwest... ...Heavy rain and scattered to isolated thunderstorms along Mid-Atlantic and Southeast... Anomalously warm air will linger across the Midwest and Northeast ahead of an approaching low pressure system from the Plains. Temperatures are likely to be warm enough to contribute to widespread records being broken from the Midwest to the Northeast, where high temperatures are expected to be up to 40 degrees above average today.The warm airmass will recede into the Northeast and Mid-Atlantic on Wednesday, where high temperatures are expected to be similarly anomalous than they were on Tuesday. A weak low pressure system approaching the Pacific Northwest will be the focus for heavy snow across the Cascades and Northern Rockies over the next 2 days. Snowfall totals of over a foot are expected for those areas. Meanwhile, the main low pressure system during the last few days will continue to be the focus for rain and thunderstorms as it moves east today. Some thunderstorms may be severe according to The Storm Prediction Center. Heavy snow is a possibility on the backside of this system, particularly over the Upper-Midwest. Snowfall totals may reach 6 inches with locally higher amounts possible. Freezing rain/ice accumulations may reach a tenth of an inch across parts of the Upper-Mississippi Valley. Winter Weather Watches/Advisories are currently in effect the Plains and Upper Midwest. By the time the Plains system reaches the East Coast on Wednesday it will have dropped up to 3 inches, with locally higher amounts possible, of rainfall over the Mid-Atlantic/Southeast. Therefore, a Slight Risk of Excessive Rainfall leading to Flash Flooding is expected over the Mid-Atlantic on Wednesday. Kebede Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php