Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 257 AM EDT Wed Aug 07 2024 Valid 12Z Wed Aug 07 2024 - 12Z Fri Aug 09 2024 ...Considerable flooding associated with Tropical Storm Debby to impact portions of South and North Carolina... ...Monsoon storms continue across the Southwest and Four Corners regions... ...Excessive heat from the Southern Plains to the Lower Mississippi Valley through Thursday... Tropical Storm Debby is forecast to restrengthen a bit and re-curve toward the Southeast today before making landfall along the central South Carolina coast tonight. Debby is expected to produce an additional 3 to 9 inches of rainfall with locally higher amounts, leading to maximum amounts as high as 25 inches in South Carolina and 15 inches in southeast North Carolina through Friday. There is a High Risk (at least 70%) of Excessive Rainfall leading to Flash Flooding over portions of the Carolina coast today before expanding into inland areas on Thursday as Debby moves onshore. The Storm Prediction Center issued a Slight Risk of Severe Thunderstorms for portions of eastern North Carolina and southeast Virginia for Thursday with a risk of tornadoes present. Evening storms produced by tropical moisture from Debby interacting with a cold front from the north will support heavy rainfall over parts of eastern Maryland, Delaware, southeastern Pennsylvania and southern New Jersey this evening. A Slight Risk (at least 15%) of Excessive Rainfall is in effect for the aforementioned areas to account for some instances of flash flooding from the evening convection. Elsewhere, monsoonal storms are expected to continue across the Southwest and Four Corners regions through the latter part of this week. Flash flooding concerns increase on Thursday and Friday over portions of the Central/Southern High Plains including the Sangre De Cristo Mountains, where a Slight Risk of Excessive Rainfall is in effect. Scattered showers and thunderstorms will track across the Northern Plains and Upper Midwest over the next couple of days beneath a strengthening upper-level low. A unseasonably cool air mass will descend upon the Great Plains behind a strong cold front beginning today. High temperature anomalies between 15-25 degrees below average are expected to expand from the Northern Plains today into the Central Plains on Thursday. Meanwhile, a heat wave will grip portions of the Southern Plains and Lower Mississippi Valley through the end of the work week, with highs in the 100s and lows in the upper 70s to low 80s creating widespread Major to isolated Extreme HeatRisk. The lack of overnight relief in these areas will pose a potential risk to those without effective cooling and/or adequate hydration. Heat Advisories are in effect for today. Kebede Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php