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.
A powerful Pacific low pressure system will impact the Northwest United States and Canada with strong winds, heavy rains and heavy mountain snow, starting Tuesday, November 19, 2024. The storm is expected to rapidly intensify as it approaches the coast.
The Spanish Meteorological Agency (AEMET) issued a severe weather advisory on November 12, 2024, warning of heavy rainfall and potential flooding in the Mediterranean and Andalusian coastal regions through November 15. Rainfall is expected to reach 150 mm (5.9 inches) in 24 hours in some areas, only two weeks after previous severe flooding in eastern Spain.
A severe winter storm impacting parts of Colorado and New Mexico is expected to bring additional heavy snowfall on Friday, November 8, 2024. Parts of the area had already accumulated 25 – 50 cm (10 – 20 inches) of snow by Thursday night, November 7, prompting the Colorado governor to declare a disaster emergency for what could be Denver’s most severe snowstorm in 30 years. Snowfall rates of 2.5 – 5 cm per hour (1 – 2 inches per hour) are anticipated to continue across the region, with total snow accumulations forecast to reach 30 – 120 cm (1 – 4 feet) in some areas.
At least five people were reported dead after a storm system brought heavy torrential rains to Missouri starting on Monday, November 4, 2024. The system dropped around 203 mm (8 inches) of rain over the region between Monday and Tuesday, November 5, leading to widespread floods and rescues.
