‘Super fog’ covered St. James Parish and parts of southern Louisiana on the morning of Friday, November 14, 2025. Near-whiteout conditions were reported on some roads, while visibility was reduced to 3 m (10 feet) in multiple areas.
A combination of the ongoing weak La Niña, the Madden–Julian Oscillation (MJO), and a rare November Sudden Stratospheric Warming (SSW), could bring colder winter-conditions across parts of the U.S. during late November and early December
Evacuation warnings were issued across multiple burn-scar zones in California on November 13, 2025, as a strong atmospheric river delivered high rainfall rates and elevated debris-flow potential.
A strengthening low-pressure system offshore is forecast to spread heavy precipitation and mountain snow across the Sierra Nevada from Thursday, November 13 through November 15, 2025. Winter Weather Advisories are in effect for the Eastern Sierra Slopes, Greater Lake Tahoe Area and the West Slope Northern Sierra Nevada, with snow levels forecast to drop into November 14 and accumulations reaching 30–60 cm (12–18 inches) at the highest peaks.
A strong atmospheric river is forecast to move onshore across California through Saturday, November 15, 2025, bringing heavy rain, strong southwest winds, and elevated flash-flood risk across northern, central, and southern parts of the state.
Interior Mendocino and Lake counties are under a Flood Watch from late Wednesday, November 12, through Thursday morning, November 13, 2025, as 50–75 mm (2–3 inches) of rain is forecast within several hours. Marine Storm and Gale Warnings are also in effect offshore, where winds up to 95 km/h (60 mph) and seas up to 8 m (27 feet) are expected.
Miami recorded 9.4°C (49°F) early on November 11, 2025, matching a record low for the day set 112 years ago, as an Arctic front brought widespread sub-freezing temperatures.
An early stratospheric warming developing over the Arctic in late November 2025 is raising the likelihood of colder conditions and increased snowfall across parts of the United States, Canada, and possibly Europe in December.
The National Weather Service has issued widespread Freeze Warnings from northern Florida to Maryland as sub-freezing temperatures spread across the eastern United States on November 11–12, 2025. Overnight lows between -6 and -1 °C (22 and 30 °F) are forecast across much of the region, marking the coldest air of the season so far.
A strong atmospheric river is forecast to make landfall along the U.S. West Coast on Wednesday, November 12, 2025, bringing heavy rain and mountain snow across much of California through Friday, November 14.
