As per reports, adverse weather conditions are expected in parts of the US through Tuesday (17 September):
• A persistent high-pressure system that has blocked the northward movement of tropical moisture associated with Francine will maintain clear and stable weather conditions across the country’s northeastern region throughout Tuesday (17 September).
• Meanwhile, the remnants of Francine will be positioned between the high-pressure system and a slow-moving front near the Gulf Coast, bringing the risk of heavy rainfall and flash flooding to much of Mississippi and southwestern Alabama through Sunday (15 September).
• The threat of flash flooding over the interior southern regions is expected to diminish gradually by Monday (16 September). However, the eastern Gulf Coast will remain under a marginal risk of flash flooding through Monday (16 September).
• The National Hurricane Center is monitoring the potential development of a low-pressure system forming along a stationary front, which may acquire subtropical or tropical characteristics as it moves generally north to northwest toward land. This situation could increase the risk of wind and rain for the Carolinas through Monday (16 September).
• An unsettled weather pattern is expected as a strong upper-level trough drives a frontal system into the region. This system will advance across northern California, the Great Basin, and the northern Rockies through Monday (16 September). Widespread rainfall and thunderstorms will accompany the system, with a marginal risk of excessive rainfall of level one in effect for parts of the northern Rockies and Great Basin on Monday (16 September).
• A Winter Weather Advisory is in effect for parts of the Sierra Nevada, where several inches of snowfall may accumulate through Monday (16 September). Additionally, rainfall chances will increase across the Southwest and Four Corners region through Monday (16 September), as tropical moisture moves northward ahead of Tropical Storm Ilean.
• High temperatures are expected to reach the 80s and 90s across the Central US and Northeast through Monday (16 September), with some areas in the Upper Midwest and Great Lakes experiencing temperatures more than 15 degrees above average. In contrast, temperatures in the West will initially be near or slightly below average, however are forecast to drop 15 to 25 degrees below normal in Oregon, California, and Nevada by Monday (16 September). Highs in the Great Basin will be in the 50s, while the Sierra Nevada will likely see temperatures only reaching the 30s and 40s.
