Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 337 AM EDT Wed Sep 02 2020 Valid 12Z Wed Sep 02 2020 - 12Z Fri Sep 04 2020 ...Heavy rainfall/flash flooding in and near the ArkLaTex Wednesday into Thursday... ...Extremely critical weather risk for Northern Plains/Rockies Wednesday afternoon and evening... ...Severe weather risk in the Mid-Atalantic States Thursday and Friday... Most of the rainfall during the next couple of days will occur along a front at the leading edge of an upper level trough, between the Southern Plains and the Northeast. Scattered instances of flash flooding are expected between the Southern Plains and Arkansas; a Moderate Risk of Excessive Rainfall exists in and near the ArkLaTex Wednesday and Wednesday night, where grounds have become quite saturated over the past few weeks. The flash flood/excessive rainfall risk slowly fades in that region on Thursday and Friday. A Slight Risk for severe weather exists on Thurday and Friday afternoon and evening for portions of the Mid-Atlantic states farther up the front, on the east side of the upper level trough. Temperatures are expected to rise across the West and East Coast over the next couple of days. High pressure building in the west will contribute to temperatures being increasingly hotter than average there, while warm air will surge north along the East coast ahead of the approaching low pressure system. Record high temperatures are expected across the West on Friday while the Florida Peninsula swelters under near record breaking heat Wednesday through Friday. Record warm low temperatures are most likely in and near the Carolinas through Friday. Cool air will surge south and into the Northern Plains and Upper Midwest on the backside of a low pressure system. Due to dry and breezy conditions, much of the Northern Rockies and Plains are under an area of elevated fire weather risk. Extremely critical fire weather conditions are likely along the foothills of the Northern Rockies into the Northern High Plains on Wednesday afternoon and evening. Roth Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php