A powerful storm system is set to intensify by Wednesday, December 4, 2024, bringing strong winds to the northern Plains and Midwest before spreading across the Great Lakes and Northeast by the end of the week.
Severe thunderstorms hit parts of Argentina, Uruguay and southern Brazil’s Rio Grande do Sul on Sunday, December 1, 2024, bringing strong winds, heavy rain and large hail. The worst affected was Rio Grande do Sul where about 3 million people were left without power.
Storm Bora continues to affect Greece bringing heavy rain and thunderstorms to eastern regions, including Athens, Thessaly, and the Cyclades on Monday, December 2, 2024. The storm resulted in widespread destruction and at least 3 fatalities.
Isolated storms, ranging from moderate to severe, are forecast in several regions of Brazil as November concludes, driven by hot, humid tropical air creating unstable atmospheric conditions.
Storm Conall, the third named storm of the season, is bringing heavy rainfall and widespread flooding to the southern UK, with 90 flood warnings issued as of Wednesday morning, November 27, 2024, including severe “danger to life” notices in Northamptonshire and Wales.
The Center for Western Weather and Water Extremes has warned of an intense winter storm impacting the Southern Sierra Nevada and parts of the Intermountain West from November 25 to 28, 2024. Forecasts indicate over 180 mm (7 inches) of precipitation and snow accumulations exceeding 1.5 m (5 feet) at higher elevations, with flash flood and winter storm warnings in effect.
The strongest atmospheric river of the season, driven by a bomb cyclone with a central pressure of 945 hPa, ravaged the U.S. West Coast on Wednesday, November 20, 2024, bringing unprecedented rainfall, flooding, and wind damage. Northern California bore the brunt of the storm, with 543.4 mm (21.39 inches) of rain recorded in Sonoma County and widespread flooding that stranded hundreds. Meanwhile, fierce winds of up to 206 km/h (128 mph) toppled trees and left communities without power.
Storm Caetano swept through France on Thursday, November 21, 2024, bringing an unseasonal winter episode with powerful winds reaching 131 km/h (81 mph) and heavy snowfall of up to 16 cm (6.3 inches). The storm caused widespread disruptions, including power outages for over 250 000 homes, severe traffic halts with 5 000 vehicles stranded, and a major accident on Route A6B near Paris that injured 36 people.
A powerful, rapidly intensifying cyclone wreaked havoc across the northwestern United States and parts of Canada on Wednesday, November 20, 2024, causing at least 2 deaths and leaving more than 600 000 customers (approximately 1.5 million people) in the U.S. without power. Another 140 000 customers (approximately 335 000 people) were left without power in B.C., Canada.
A powerful AR4 atmospheric river made landfall in the Pacific Northwest and Northern California on November 19, 2024, bringing prolonged rainfall, heavy snowfall, and significant flooding risks that are expected to worsen through November 22. Meteorologists warn that the storm could bring up to 380 mm (15 inches) of rain to the Coast Ranges and Sierra Nevada, with some areas potentially receiving more.
