607 FXUS01 KWBC 051955 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 PM EDT Mon Oct 05 2026 Valid 00Z Tue Oct 06 2026 - 00Z Thu Oct 08 2026 ...Heavy rainfall threat gradually edges off the Gulf Coast as showers and storms persist in Florida... ...An October heatwave will remain across central and southern California into this week... ...Autumnal chill will overspread the Great Lakes and Northeast behind a cold front... A frontal boundary responsible for the recent wet weather pattern along the Gulf Coast region is forecast to slowly edge farther south over the next couple of days. While the northern Gulf Coast will begin to clear out as high pressure settles in north of the stationary boundary, scattered showers and thunderstorms will continue to bring a marginal threat of excessive rainfall and an accompanied isolated flash flooding risk across northern and central Florida for the next couple of days. 3 day rainfall totals (Tuesday-Thursday) will range from around 2-4 inches across this region in a soggy weather pattern. An anomalous upper-level ridge of high pressure remains in control across much of the West into the northern Plains, providing plenty of anomalous warmth. The forecast has remained consistent with no change in hazardous heat messaging for the California Heat Wave. Temperatures will run 15 to 20 degrees above normal, bringing highs well into the 90s toward the coast and adjacent urban areas, with some areas in the Central Valley of California soaring into the lower 100s. Overnight lows in the mid to upper 70s in the Los Angeles and San Diego urban areas will provide little relief through the heatwave. Extreme Heat Warnings are in effect for portions of Southern California and the interior deserts, while Heat Advisories extend across the Central Valley and Bay Area. A piece of this warm air mass is spreading northeastward across the Great Basin into the northern Rockies where high temperatures in the middle and upper 80sâ€â€around 10 to 20 degrees above averageâ€â€will challenge some daily high temperature records. There will also be the chance for isolated thunderstorms both Tuesday and Wednesday across the Great Basin and Four Corners region as a weak upper-level low progresses through the region. In contrast to a summer feel-like heat across the West, an Autumn airmass has made an appearance across the Midwest and Northeast with cool, dry air filtering in behind a cold front passage. High temperatures in the low 70s to middle 60s are forecast for the Ohio Valley into the Mid-Atlantic on Tuesday, with afternoon temps in the 50s likely across New England. Morning low temperatures on Tuesday and Wednesday will range from the upper 30s to low 40s with some cooler areas dropping into the middle 30s thanks to efficient radiational cooling in a dry air mass. This is one of the first cold shots of the fall season and will bring some agricultural risk. Frost Advisories and Freeze Warnings are in effect for Tuesday morning across portions of the interior Northeast and Appalachians. After a brief cool down across portions of the Southeast on Tuesday, temperatures will begin to modify into the 80s for Wednesday and Thursday. In the tropics, the NHC has tagged Invest 92-L across the southwestern Gulf of Mexico. Formation chances of a tropical cyclone are 60 % in the short range period through 48 hours and 80% through the next 7 days. Keep updated with the latest forecast from the National Hurricane Center in the link: https://www.nhc.noaa.gov. Wilder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$