Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 239 AM EDT Fri Mar 20 2020 Valid 12Z Fri Mar 20 2020 - 12Z Sun Mar 22 2020 ...The first full day of Spring will see a battle between warm and cold across the nation... ...Record warmth possible on the first full day of spring from DC southward into Florida, while much below average temperatures stretch through the Plains... ...Heavy rains and flash flooding possible Friday from eastern Texas into the Lower Mississippi Valley... ...The Heavy snow threat will be shifting into the Upper Great Lakes region Friday... The first full day of Spring will offer both wintry and very warm weather conditions along either side of a strong front pressing southeastward across the Ohio Valley, Mid to Lower Mississippi Valley and into portions of the Northeast. A heavy snow threat will be shifting northeastward Friday into portions of the Upper Great Lakes as the storm that brought Blizzard conditions to portions of the Central Rockies and Central Plains reorganizes early Friday across the Great Lakes into southeast Canada. This system is fast moving which should keep any heavy snow threat short lived across the Upper Great Lakes Friday. The strong front pushing southeastward Friday across the Ohio Valley, Lower Mississippi Valley into portions of the northeast will be the dividing line between potentially record high temperatures from the Nations Capital southward into Florida and much below average temperatures across the mid section of the nation. High temperatures Friday will be 10 to 20 degrees above average from the Mississippi River to the east coast and 10 to 20 degrees below average through all of the Plains. This cold air will be pressing eastward by the beginning of the weekend, bringing much cooler temperatures Saturday from New England into the Mid-Atlantic. The strong frontal boundary will also be the focus for potentially heavy rains and flash flooding from east Texas into the Lower Mississippi Valley on Friday. The combination of much above average moisture levels along this front and strong upper level forcing will support the heavy rain potential across these areas. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php