Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Fri Aug 09 2024 Valid 12Z Fri Aug 09 2024 - 12Z Sun Aug 11 2024 ...Dangerous flooding and severe weather continue as Debby accelerates through the Mid-Atlantic and Northeast today... ...Below average temperatures persist across the Northern to Central Plains, Upper to Mid Mississippi Valley... ...Above average temperatures continue across the West into the South, but with less record highs compared to previous days... ...Elevated fire weather conditions and poor air quality continue across Great Basin... After a slow trek through the Carolinas over the last 24 hours, Debby is simultaneously weakening and accelerating northeastward along the spine of the Blue Ridge. Unfortunately, even in Debby's weakened state, dangerous flash flooding and severe weather will continue through tomorrow across portions of the Carolinas, Mid-Atlantic, Interior Northeast, and New England. Across the Carolinas, additional heavy rainfall is expected to batter the region today, which will exacerbate ongoing catastrophic and considerable flash flooding as storm total rainfall approaches 15-25 inches in spots. Closer to Debby's immediate track, 3 to 7 inches of rainfall across the Mid-Atlantic and Northeast states will produce considerable to locally catastrophic flooding impacts through tomorrow morning. The same cells responsible for this dangerous and prolific rainfall are also capable of producing a few tornadoes. In the short term this morning, a few tornadoes remain possible across portions of the Mid-Atlantic (North Carolina, Virginia, and Maryland), although the risk will shift into the Northeast (New Jersey, eastern Pennsylvania, and southeast New York) later today. The northeast acceleration of Debby is in response to the large scale closed low associated with a strong cold front stretching from the Great Lakes, southwestward through the Plains. Below average temperatures in the wake of this strong front already encompass the Northern to Central Plains, Upper to Middle Mississippi Valley and Great Lakes, which will plunge southward into portions of the Southern Plains, Ohio Valley, and Tennessee Valley today and tomorrow. The forecast remains on track for a few record low maximum temperatures today across portions of the Central Plains into the Middle Mississippi Valley and over northern Minnesota with forecast high temperatures nearly 20-25 degrees below normal. In contrast, above average temperatures will continue over the next few days across much of the West into Texas, the South, and Gulf Coast as the front stalls out to the north. A few record highs still possible across portions of the central to eastern Gulf Coast over the next few days, although the number of overall record highs across the country continue to decrease from previous days. Even with less record high potential, the current heat has led to a swath of Heat Advisories across portions of southeast Texas and eastward along the Gulf coast. In addition to the heat across portions of the Northwest and West, the dry conditions, low relative humidities and gusty winds will maintain a fire weather threat tomorrow over northern Nevada and southern Idaho. Smoke from current fires will also continue to produce poor air quality across the Pacific Northwest in general. Asherman/Oravec Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php