Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 PM EDT Tue May 29 2018 Valid 00Z Wed May 30 2018 - 00Z Fri Jun 01 2018 ...Subtropical Depression Alberto to spread heavy rainfall from the Deep South northward into vast sections of the Tennessee/Ohio Valleys and interior Carolinas... ...Severe thunderstorm threat looms for much of Oklahoma/Kansas into southeastern Nebraska today... ...Record overnight warmth likely generally to the east of Alberto's forecast track... Although Alberto is slowly weakening as it tracks north through the Tennessee Valley today it is generating thunderstorms across much of eastern Gulf states, Southeast, Mid-Atlantic and Tennessee Valley. Heavy rain from Alberto over this area warranted a moderate risk for excessive rainfall with the increased threat for flash flooding. As the remnants of this system lifts in the Ohio Valley on Wednesday the area of slight risk expands northward into the Midwest, Ohio Valley and northern Mid-Atlantic. Additional amounts of 2 to 4 inches of rain, with isolated higher totals, is likely to fall from northern sections of Alabama/Georgia northward across western Tennessee/Kentucky into southern Illinois. For the latest storm totals from Alberto, please visit the latest storm summary at: www.wpc.ncep.noaa.gov/discussions/nfdscc5.html. Elsewhere across the Eastern Seaboard, unsettled conditions should continue with daily chances for showers and thunderstorms. Multiple lines of strong to severe thunderstorms are forming over the Central Plains and Upper Midwest this afternoon. While the parent surface front should gradually dissipate, a series of other convergence axes will provide impetus for convective activity today over large sections of the central U.S. Based on the latest Storm Prediction Center convective outlook, an enhanced risk is in place over much of central Oklahoma/Kansas with all threats possible. Expected slow cell motions should also afford a threat for localized flash flooding over this mentioned region. Light to moderate showers and thunderstorms, with mountain snow, will sweep through the Great Basin/Northwest/Intermountain West over the next couple of days as a slow-moving front moves eastward. Conditions will be favorable on Wednesday for strong to severe convection to develop over portions of Idaho and western Montana. The Storm Prediction Center has this region identified as having a slight risk for severe weather. The month will come to a close with above average temperatures for a majority of the country- with a chance for more daily records to be broken. First considering afternoon highs, widespread numbers between 100 and 105 degrees along the Rio Grande River and over west Texas should spark some records. However, on the larger scale, several locations could see record breaking numbers when considering warm overnight lows. In particular, two areas of the country seem to be in this boat, the Upper Midwest as as well locations east of Alberto's cyclone track. Numbers seem to depart by around 10 to 15 degrees from climatology in most cases. Campbell/Rubin-Oster Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php