Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Tue Sep 22 2020 Valid 12Z Tue Sep 22 2020 - 12Z Thu Sep 24 2020 ...Tropical Storm Beta is forecast to weaken and gradually lose tropical characteristics while spreading flooding rains further inland across the lower Mississippi Valley... ...Large swells generated by Hurricane Teddy could cause dangerous surf and rip current along the U.S. East Coast... ...Another frosty morning in parts of the Northeast; warm in the West and the northern Plains as rain moves into the Pacific Northwest... Tropical Storm Beta has made landfall over the middle Texas coast, spreading heavy rain further inland together with strong and gusty winds. Under the influence of southwesterly winds aloft, Beta is forecast to track slowly toward the east-northeast near/along the upper Texas coast today and much of Wednesday. Meanwhile, a large high pressure system over the eastern U.S. has been feeding cool air into the Deep South. As the cool and stable air continues to filter into the circulation of Beta, the storm is expected to gradually lose tropical characteristics as it moves into southern Louisiana Wednesday night into Thursday. The focus of heavy rain will gradually shift from the circulation of Beta to farther up across the lower Mississippi Valley during the next couple of days. In fact, locally heavy rain is already occurring in Arkansas this morning in association with an upper-level disturbance that is not directly related to Beta. Heavy rain is also possible near the Louisiana coast today ahead of an old boundary that is returning as a warm front. Hurricane Teddy moving northward through the Atlantic Ocean is forecast to transition to a potent post-tropical cyclone and move across the Canadian maritimes around midweek. In the U.S., the main impacts of Teddy will be the potential for large swells along the East Coast, which will likely cause life-threatening surf and rip current conditions. Eastern Maine could get some rain from Teddy's western edge, and gusty winds can be expected. Elsewhere, a frontal system approaching the Pacific Northwest should bring rain to the Northwest Tuesday night into Wednesday. A round of light rain and thunderstorms is possible in the Upper Midwest Wednesday as a front passes through, and isolated showers and thunderstorms are possible in the Four Corners region mainly Tuesday afternoon, some of which could be dry thunderstorms, creating a fire danger threat. The rest of the country should be generally dry. High pressure dominating the eastern U.S. will lead to continued cool temperatures Tuesday morning--frost is possible once again for portions of the Central Appalachians, and a few record lows are in jeopardy in the East. Cool weather is also forecast westward into the Southern Plains under the influence of rain and cloudiness from Beta. Meanwhile, the north-central U.S. in particular can expect above normal temperatures, with some locations approaching 90 degrees on Tuesday. Kong/Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php