Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 338 PM EDT Tue Apr 21 2020 Valid 00Z Wed Apr 22 2020 - 00Z Fri Apr 24 2020 ...Heavy rains, flash flooding and severe thunderstorms possible from the Southern Plains, across the Lower Mississippi Valley and into portions of the South... ...Increasing Fire Weather Risk from southeast Arizona, across southern New Mexico and into Southwest Texas... ...Below average temperatures expected over the northeast quarter of the nation, while above average temps are forecast from California, the Southwest, Plains and Florida... A storm system developing across the Southern Plains tonight will be producing a widespread region of potentially heavy rains, flash flooding and severe thunderstorms from the Southern Plains, east into the Lower Mississippi Valley and portions of the South. The threat will be confined across the Southern Plains Tuesday night into early Wednesday, pushing into the Lower Mississippi Valley, Tennessee Valley, Ohio Valley and the South Wednesday into Thursday. Areas from northern Louisiana into much of Mississippi, Alabama and Georgia have received much above normal amounts of precipitation over the past several days. The heavy rains from this next system will likely move over areas that recently received heavy rains and flooding. Stream flows are much above average across these areas, with the expected additional rains likely to produce additional flooding across portions of Louisiana, Mississippi and Alabama. On the west and southwest side of the developing Southern Plains storm, winds will be increasing across the Southern High Plains into portions of the Southwest. These increasing winds and low relative humidities will increase the fire weather threat over the next two days from southeast Arizona, across southern New Mexico into Southwest Texas. In the wake of the strong front moving off the northeast coast this evening, temperatures will be below average over the next two days across much of the northeast quarter of the nation from the Great Lakes into the Ohio Valley, Mid Atlantic, and New England. In contrast to this, above average temperatures will persist across California, the Southwest, the Plains and Florida. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php