Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 AM EDT Fri Aug 06 2021 Valid 12Z Fri Aug 06 2021 - 12Z Sun Aug 08 2021 ...Heavy rainfall and the chance for flash flooding continues for portions of the Southeast along a persistent frontal boundary... ...Showers and severe storms expected from the Northern Plains to the Midwest today and Saturday... ...Hot in the Plains, poor air quality due to wildfire smoke continues in the Midwest and Intermountain West... The Southeast looks to close out the work-week and start the weekend on a stormy note thanks to a stationary frontal boundary. Daily episodes of blossoming shower and thunderstorm activity are expected with storms capable of producing heavy downpours. The locations forecast to receive the most rainfall through Sunday morning extend from Florida on north across the eastern Carolinas and into the Virginia Tidewater. Marginal Risks for Excessive Rainfall are in place for these aforementioned areas today and Saturday. The frontal boundary over the Southeast is forecast to dissipate by Sunday and in doing so, reduces the coverage and intensity of showers and storms throughout the region to close out the weekend. Farther north and west, an upper level disturbance aiding in the development of a frontal system will track from the northern High Plains today into the Upper Midwest into Saturday. Marginal Risks for excessive rainfall and severe weather have been issued for portions of these regions today with damaging winds, large hail, and flash flooding possible. By Saturday, the primary wave of low pressure is forecast to strengthen over the northern Plains with a more favorable setup for severe weather anticipated in the Midwest. As a result, the Storm Prediction Center has issued a Slight Risk for parts of the Midwest for Saturday. Some storms could also produce excessive rainfall rates and potentially localized flash flooding. Temperature-wise, the central High Plains are forecast to witness abnormally hot conditions with highs reaching the century mark in some spots. Increasingly warmer and humid conditions return to the Northeast this weekend while cooler than normal temperatures stick around in the Southeast thanks to the nearby frontal boundary. In addition, poor air quality due to wildfire smoke from the West looks to remain an issue, particularly for portions of Northern California, the Northwest, the High Plains, and the Midwest. Red Flag Warnings have been posted for parts of the Intermountain West due to favorable fire weather conditions today. Mostly dry conditions are on tap for much of the Southwest and Lower Mississippi Valley through Saturday night. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php