Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 219 PM EDT Fri Sep 11 2020 Valid 00Z Sat Sep 12 2020 - 00Z Mon Sep 14 2020 ...Very poor air quality expected across the Pacific Northwest this weekend... ...An area of disturbed weather expected to move from the Bahamas across South Florida and into the eastern Gulf of Mexico on Saturday... ...Locally heavy rains expected across the Upper Mississippi Valley/Upper Great Lakes region tonight into Saturday and across the Ohio Valley/Central Appalachians region Saturday night into Sunday... ...Above average temperatures will continue across much of the West this weekend, while the much below average temperatures recently across the central U.S. continue to warm... While some fire weather conditions have improved across the western U.S. over the past few days, dry weather and above average temperatures will continue through the weekend. Ongoing fires across the west have produce very poor and unhealthy air quality due to the large amounts of wildfire smoke. Through the weekend, this very poor air quality is expected to persist resulting in air quality alerts in effect for all of Washington State, Oregon and large portions of California. An area of disturbed weather is expected to push westward from the Bahamas across South Florida and into the eastern Gulf of Mexico. This area of disturbed weather will likely produce locally heavy rains across portions of Florida this weekend. In addition, there is potential for a tropical depression to form from this area of disturbed weather this weekend. Please see the latest Tropical Weather Outlook from the National Hurricane Center for additional and updated information across this area. Wet weather on tap tonight into Saturday from the Upper Mississippi Valley into the Upper Lakes. This precipiation is associated with the storm system that was nearly stationary earlier in the week across the Great Basin and Rockies and was responsible for the early season Rockies and High Plains snowstorm. This system has become much more progressive and will be spreading moderate to locally heavy rains tonight into Saturday from the Upper Mississippi Valley into the Upper Lakes and across the Ohio Valley into the Central Appalachians Saturday night into Sunday. The much below average temperatures that have been across the mid section of the nation over the past few days are expected to continue to warm this weekend. Areas from the Central Rockies into the Central Plains will return to above average temperatures during Sunday. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php