Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 327 AM EDT Tue Sep 09 2025 Valid 12Z Tue Sep 09 2025 - 12Z Thu Sep 11 2025 ...Weak front linger over Florida... ...There are Air Quality Alerts over parts of the Northwest... ...There are Frost Advisories over parts of the Northeast... A front extending from the Upper Midwest across the Northern Plains into the Northern Rockies will become quasi-stationary from the Middle Mississippi Valley to the Northern Rockies by Thursday. Moisture flowing northward over the Plains will produce showers and thunderstorms over parts of the Upper Great Lakes, Upper/Middle Mississippi Valley, and over the Central Plains through Tuesday night. Further, on Tuesday, the moisture and upper-level energy will produce showers and strong to severe thunderstorms over parts of the Central/Southern High Plains. A second front will be lingering over Florida through Thursday. Tropical moisture will pool over Florida and the Central Gulf Coast, which will aid in the development of showers and thunderstorms over Florida and along the Central Gulf Coast through Thursday. Waves of low pressure will move along the front over the Atlantic, streaming moisture westward into parts of the Eastern Seaboard, producing light rain along the Coast as far north as New England by Wednesday. In addition, the flow of moisture off the Western Gulf will trigger showers and thunderstorms over the southern tip of Texas through Wednesday evening. A developing upper-level low over the Northwest will slowly move into Northern California, which will impact most of the West. The upper low will produce rain over parts of the Pacific Northwest and Northern California that will expand into parts of the Northern Intermountain Region and the Northern/Central Rockies overnight Tuesday. The rain, accompanied by embedded thunderstorms, will continue over parts of the West through Thursday. Lastly, an area of cold high pressure over the Northeast has prompted Frost Advisories across parts of the Northeast from early morning to late morning hours. Furthermore, smoke from wildfires has prompted Air Quality Alerts over parts of the Northwest. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php