Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Mon Jul 20 2020 Valid 00Z Tue Jul 21 2020 - 00Z Thu Jul 23 2020 ...Relief from the heat for portions of the Northeast Tuesday and Wednesday while hot and humid conditions continue across the remainder of the East and Northwest... ...Severe weather and flash flood threats from portions of the northern and central U.S. into the Ohio Valley and Mid-Atlantic into mid-week... Summer heat and humidity will be taking a temporary break across the Northeast as a cold front moves through the region tonight. High temperatures on Tuesday and Wednesday will be dipping back into the 70s (northern New England) and 80s (southern New England/New York). Subtle relief will also be seen farther south into the Mid-Atlantic region where high temperatures will be a few degrees cooler on Tuesday and Wednesday than what was seen Sunday and Monday, but highs well into the 90s will continue for at least another few days along with high humidity. The cold front to pass through the Northeast will stall from the Mid-Atlantic Coast into the Central Plains on Tuesday. This front and another frontal system moving through the north-central U.S. will serve as foci for showers and thunderstorms, some of which will be severe and contain locally heavy flash flooding rainfall. Farther south across Texas, an area of low pressure drifting westward through the Gulf of Mexico will continue produce showers and thunderstorms to its north and west as it tracks toward the middle Texas coast while weakening. National Hurricane Center is watching this disturbance for organized tropical development, but believes the chances are low given the system will be moving over land soon. Across the western U.S., above average heat will continue in Washington/Oregon as well as into the Intermountain West on Tuesday. For Wednesday, highs in the mid-upper 90s are expected to shift east into portions of Montana into Wyoming but a cold front will bring cooler weather to the Pacific Northwest for Wednesday. Otto Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php