Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 352 PM EDT Sun Aug 11 2019 Valid 00Z Mon Aug 12 2019 - 00Z Wed Aug 14 2019 ...Heavy rain for the central and Northeast U.S. through Tuesday... ...Warmer than normal conditions across the South and into Mid-Atlantic... The low pressure system that brought heavy rain to the Central Plains today is expected to shift eastward and impact the Ohio Valley and Northeast tomorrow. There are Slight Risks of Excessive Rainfall for parts of the Northern Plains and Midwest as upwards of 1-2 inches of rain is possible for those areas tomorrow. The Storm Prediction Center issued an Enhanced Risk of Severe Thunderstorms for central Illinois on Tuesday, therefore there's an added threat of damaging winds. The Slight Risk of Excessive Rainfall area will shift east on Tuesday to encompass much of the Ohio Valley, Lower Great Lakes and southern New England as the system begins to move offshore. A Slight Risk of Severe Thunderstorms is in effect for the Tennessee Valley and Mid-Atlantic on Tuesday. Upper level ridging will continue over the southern U.S. through the short range period. As a result, excessive heat warnings and heat advisories are in effect today for areas in the Lower/Central Mississippi Valleys, as highs will be well into the 90s and low 100s and dewpoints in the 70s, producing heat indices on the order of 105 to 115 degrees during peak afternoon heating. The warmer temperatures will shift eastward tomorrow, and Tuesday as the ridge expands and the northern stream flattens out over the northern half of the CONUS. Temperatures will be 10-15 degrees above normal for parts of the Mid-Atlantic on Tuesday. Elsewhere, monsoonal moisture will also continue to produce diurnally driven showers and thunderstorms this evening across the southern Rockies, some of which may be heavy at times, and especially over the higher terrain. Some localized flash flooding will be possible here as well, particularly over and near any burn scar locations. Kebede Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php