Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Thu May 25 2017 Valid 00Z Fri May 26 2017 - 00Z Sun May 28 2017 ...There is a slight risk of severe thunderstorms over parts of the Central High Plains... ...Enhanced risk of severe thunderstorms and slight risk of flash flooding possible across the southern Plains and Mississippi Valley... A strong upper level low will swing out from the Southeast into the Atlantic Ocean this evening. This will push the cold front even farther away from the East Coast. However, the primary low will move off the Mid-Atlantic coast tonight and track northward along the New England coastline. This will bring showers and thunderstorms throughout the Northeast and New England on Friday. By Friday night, the low will approach Nova Scotia and cause precipitation to taper off throughout the night. Cooler temperatures are expected from the Mid-Atlantic to New England tonight and tomorrow; by Saturday, temperatures will return to near normal. An occluded front is slowly moving through the Plains with a stationary front that is stretching back into the Central Basin. This front will move into the Upper Midwest by early tomorrow morning and will bring showers across the region. by Friday afternoon, thunderstorms will develop along the boundary as it approaches the Upper Great Lakes. The front will weaken as it moves across the Great Lakes--thus precipitation will be expected to mostly stay in southern Canada on Saturday. The stationary portion of the front will slowly move southward through the Central Great Basin and central Rockies throughout the short term period. This will act as a focal point to set off showers and thunderstorms throughout the regions. On Thursday and Friday, there is a slight risk of severe thunderstorms for eastern Colorado/northwestern Kansas as multiple rounds of convection move across these regions. By Saturday, a front will eject out into the Plains and Mississippi Valley ahead of a digging upper low. Deep southerly flow will transport moisture from the Gulf of Mexico ahead of the front--setting off thunderstorms from the Front Range to the Ohio Valley. The Storm Prediction Center has an enhanced risk of severe thunderstorms for the southern Plains and the middle Mississippi Valley. There is also a slight risk of flash flooding along this front. As a result of the deep southerly flow, above average temperatures will be expected for most of the eastern U.S. for the beginning of the holiday weekend. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php