A strong cold front is moving across the Midwest, Great Lakes, and lower Mississippi Valley, bringing showers and thunderstorms into the weekend. The front is expected to reach the East Coast by Sunday, December 10, 2023, with severe thunderstorms forecast in areas from east Texas to the lower Mississippi River Valley.
A powerful atmospheric river has brought record-breaking rainfall to Washington and Oregon, causing widespread flooding and two fatalities as of December 5. The National Weather Service forecasts the storms to continue until December 7. Notable impacts include record river levels, such as the Stillaguamish River reaching a historic 6.50 m (21.34 feet), and extensive property damage across both states.
The Pacific Northwest is bracing for a prolonged winter storm that is forecasted to last through the weekend, threatening the region with a mix of heavy rain in the coastal ranges and lower Cascades and significant snowfall in the mountain passes. This event corresponds with the CW3E’s forecast of several atmospheric rivers, set to affect the area from Saturday, December 2, through the following week.
As Arctic air sweeps across the Great Lakes, meteorologists are warning of the season’s first significant lake-effect snow event, poised to cause travel disruptions and potentially feet of snow in some areas. This weather phenomenon, intensifying early next week, is expected to bring hazardous conditions, particularly along I-90 and in snow-prone regions of Michigan, Ohio, and New York.
A significant winter storm is affecting the Rockies and Plains, bringing heavy snowfall and temperatures well below normal this holiday weekend. Forecasts predict snow accumulations of 10 – 15 cm (4 – 6 inches) in western Nebraska and central Kansas, and up to 30 – 45 cm (12 – 18 inches) in southwest Colorado. The system, which is also expected to impact the eastern states early next week, poses a severe travel risk due to gusty winds and heavy snow.
At approximately 21:00 local time on Monday, November 20, 2023, a destructive landslide, produced by intense rainfall, occurred roughly 18 km (11 miles) outside Wrangell, Alaska, on the Zimovia Highway. This event resulted in the deaths of at least three individuals, including a child, with three more reported missing. Active rescue efforts continue in the face of the landslide, which extended over approximately 152 meters (500 feet), destroying three homes and prompting urgent evacuations in the area.
A vigorous cold front is currently sweeping across the western United States, bringing a mix of high-elevation snow, coastal and valley rains, and strong winds, as reported by the National Weather Service. This weather pattern is expected to rapidly progress eastward, potentially impacting Thanksgiving travel with a series of severe thunderstorms, heavy rains, and snowfall anticipated to hit the central and eastern regions of the country early next week.
An evolving storm system off the California coast, forecasted to develop into at least one atmospheric river, is set to deliver substantial rainfall and snowfall across the West Coast starting this weekend. With the Northeast Pacific Ocean as the stage, the interaction of several low-pressure systems is predicted to have significant impact, particularly from November 14 to 17, as per the Atmospheric River Reconnaissance field campaign.
A shallow earthquake registered by the USGS as M5.3 hit near Mentone, western Texas at 10:27 UTC (04:27 LT) on November 8, 2023. The agency is reporting a depth of 7 km (4.3 miles). This is the fifth strongest earthquake in Texas on record.
Elevated seismic activity has been observed at Mount St. Helens in the United States since 2008 when the last eruption ended. No significant changes have been observed in other monitoring parameters and there are no signs of an imminent eruption.
