Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 350 AM EDT Mon May 25 2020 Valid 12Z Mon May 25 2020 - 12Z Wed May 27 2020 ...Severe weather and heavy rain causing flash flooding is possible across the Plains and Mississippi Valley... ...A Moderate Risk of excessive rainfall is in place for the eastern Florida peninsula today... ...Excessive heat builds in the West while record-setting warmth is possible in the Great Lakes region as well... A front is forecast to continue slowly moving across the Plains over the next couple of days, and should provide a focus for strong to severe thunderstorms that could cause flash flooding for the parts of the Plains and Mississippi Valley. For Memorial Day, a Slight Risk of flash flooding extends through much of Texas into eastern portions of Oklahoma and Kansas and western portions of the Mississippi Valley. Severe weather is forecast to focus mainly in Texas, but strong storms cannot be ruled out northward to the Great Lakes region. Then on Tuesday, the heaviest rainfall totals are expected in the Ark-La-Tex, so flash flooding is again possible there. Scattered showers and thunderstorms could also occur farther east into the Tennessee and Ohio Valleys and the Southeast. Over portions of Florida, ample tropical moisture flowing in plus a trough will lead to widespread heavy rainfall of 2 to 4 inches through tonight, with locally higher amounts. A Moderate Risk of excessive rainfall is in place for the Atlantic side of the state, and Flood Watches are in effect as well. Some lighter rainfall is expected to spread toward the Georgia and South Carolina coast on Tuesday. Hot temperatures will be another threat across the country over the next several days. Warmth is expected to build underneath two upper-level ridges, one in the West and one in the East. Excessive heat is possible for California today spreading into the Southwest Tuesday and across much of the West later in the week. Widespread record high maximum and minimum temperatures will be set. Meanwhile, the Great Lakes region should see high temperatures 10 to 20 degrees above normal today and Tuesday, and record highs are possible there as well as temperatures soar well into the 80s. In between, a slow-moving upper-level low should cause below normal temperatures in the Southern Plains for the next few days. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php