A significant cold outbreak is forecast for mid-February 2025 as a Sudden Stratospheric Warming (SSW) event splits the polar vortex, with one of its cores expected to move into North America.
A long-duration atmospheric river (AR) continues to impact Northern California, bringing heavy precipitation, with two additional moisture pulses expected before it dissipates on Wednesday, February 5, 2025.
A mix of freezing rain and sleet will develop across parts of the Midwest and northern Mid-Atlantic from Wednesday, February 5 through Thursday, February 6, 2025, as Arctic air lingers ahead of an approaching storm system. The greatest ice accumulation risks are expected in western Maryland, the West Virginia Panhandle, and Pennsylvania, where ice buildup may cause power outages and hazardous road conditions. Elsewhere, lighter freezing rain could still lead to travel disruptions across the Great Lakes and Ohio Valley.
A strong atmospheric river (AR) is set to bring heavy rainfall to northern California starting Sunday, February 2, 2025, with forecasts indicating up to 380 mm (15 inches) in the Sierra Nevada, increasing the risk of flash floods and debris flows near the burn scars.
The severe cross-country storm brought record rains and significant flooding to Dallas-Fort Worth areas through Thursday, January 30, 2025, leading to severe travel disruptions across the region. The storm also brought significant rain across Texas, Arkansas, and Oklahoma prompting several Flash Flood Warnings.
An extended period of landfalling atmospheric river (AR) activity will bring heavy precipitation to Northern and Central California starting January 31, 2025, and continuing into the following week. The event is expected to cause significant hydrologic impacts, with heavy rain, high-elevation snow, and potential flooding.
Parts of Texas and the Northern Gulf Coast will experience a bout of severe weather this week as a powerful cross-country storm sweeps through the south-central U.S., beginning on Thursday, January 30, 2025. The storm is expected to dump heavy snow in the southwest and the Rockies. Several areas such as Dallas and Arlington are already under Flood Watches and Warnings.
A High Wind Warning and a Flood Watch have been issued for Maui County as a powerful winter storm brings heavy rainfall, high winds, and flood risks through Friday, January 30, 2025.
Forecast confidence in a high-impact atmospheric river (AR) event has steadily increased since January 27, 2025, and CW3E is now warning about a major AR event expected to begin this Friday, January 31 along the U.S. West Coast, and potentially continue into early next week. The most recent forecast from the NCEP Global Ensemble Forecast System (GEFS) is showing >50% probability of an AR 4 or greater over along the California coast between Santa Cruz and Mendocino Counties.
Strong winds, heavy rain, and the potential for thunderstorms are expected as a winter storm develops northwest of Hawaii on Wednesday, January 29, 2025, impacting the islands through Friday, January 31. A Winter Storm Watch and Gale Watch have been issued for affected areas.
