132 FXUS01 KWBC 071949 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 348 PM EDT Wed Oct 07 2026 Valid 00Z Thu Oct 08 2026 - 00Z Sat Oct 10 2026 ...October heatwave continues across central and southern California shows sign of relief by Friday... ...Watching the future progress of Tropical Storm Isaias in the Gulf as lingering heavy rainfall and isolated flood threats in Florida begin to move north later on Thursday... An intense October heatwave continues across portions of California and the Desert Southwest, where temperatures remain 15 to 20 degrees above average with highs reaching into the 90s to low 100s and overnight lows in the mid to upper 70s providing little relief. Major to locally extreme HeatRisk means the heat is dangerous to anyone without adequate cooling or hydration. Heat Advisories and Extreme Heat Warnings remain in effect until temperatures gradually cool for coastal California on Thursday and interior areas by Friday. While not dangerously hot, conditions across the western to central United States remain well above average for October, with widespread highs in the 70s and 80s challenging or breaking some daily record highs. On the other hand, conditions remain cooler and below average along the East Coast and particularly for the Northeast, though temperatures will moderate quite a bit over the next couple of days with much warmer highs into the 70s expected for most locations by Thursday, followed by a brief intrusion of cool air reaching interior New England by Friday. Across the Florida Peninsula, widespread thunderstorms will persist over the next couple of days as tropical moisture interacts with a stationary boundary. Concurrently, Tropical Storm Isaias is projected to strengthen over the southwestern Gulf and track toward the central Gulf Coast region. This setup could bring daily accumulations of a few inches of rain to northern and central Florida, leading to isolated flooding and ponding in urban areas. The Weather Prediction Center (WPC) has outlined a marginal risk threat today (level 1 of 4) for excessive rainfall for central Florida. By Thursday night, heavy rainfall just off the Gulf Coast will begin shifting northward as Isaias takes a northerly trajectory, elevating the risk of heavy downpours in the Florida Panhandle by Friday morning. For this reason, WPC has outlined a moderate risk threat on Friday (level 3 of 4) for excessive rainfall for the Florida Panhandle and the Gulf Shores of Alabama. Because of these developments, the National Hurricane Center (NHC) has issued a hurricane watch for portions of the Mississippi and Alabama Gulf coasts as well as the western Florida Panhandle, while a tropical storm watch covers extreme eastern Louisiana and parts of the Florida Panhandle near the Big Bend region. For the latest official updates, consult the National Hurricane Center at https://www.nhc.noaa.gov, while the Weather Prediction Center maintains its collaboration on the system's heavy rain potential. Elsewhere nationwide, conditions will continue to stay mostly dry through late-week, except for some scattered showers across the central Rockies and the Four Corners, and a frontal system crossing the upper Great Lakes. Lastly, a new round of showers will develop over the north-central Plains early Friday morning ahead of a low-pressure system forming along the lee side of northern Rockies. Green/Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$