Weather Winter Storm Warning as Millions Brace for Heavy Snow Across US

Weather winter storm warning alerts are active across several US states as millions prepare for heavy snowfall on December 3–5. Officials warn some regions could see more than a foot of snow, with Colorado facing the highest accumulation risk. Travel conditions may become dangerous due to snow, ice, and strong winds.

The National Weather Service has issued multiple advisories as the storm strengthens. Meteorologists say the combination of heavy snow and gusty winds may reduce visibility and disrupt both road and air travel. Several states are preparing plow crews and emergency resources ahead of peak impact.

Weather Winter Storm Warning: States Facing Highest Snowfall Risks

Forecasters expect widespread snowfall across the West, Northern Plains, and parts of New England. According to reports referenced by US outlets, Alaska, Colorado, Maine, Montana, New Hampshire, New Mexico, South Dakota, and Wyoming are under the highest risk zones. Colorado stands out as the most impacted state, with totals in the Sangre de Cristo Mountains potentially reaching 17 inches between Wednesday morning and Thursday morning.

The National Weather Service warns that travel may become very difficult or impossible in high-elevation areas. Mountain passes in Colorado and northern New Mexico are expected to see the worst impacts. Meteorologists say the combination of blowing snow and ice could cause rapid deterioration in road conditions.

Urban areas may experience moderate snowfall. Boulder and the Denver metro region could receive up to 6 inches, with some foothill locations approaching 8 inches. In Larimer County, including Fort Collins, totals of 2 to 4 inches are expected through Wednesday afternoon. New Mexico’s East Slopes and Northern Sangre de Cristo Mountains are forecast to receive 2 to 13 inches.

Forecasters also expect another round of snowfall in northwest Colorado toward the end of the week. However, this additional system is unlikely to reach the Front Range. Meteorologist Brian Hurley told Newsweek that heavier snow bands will remain west of I-25, with southern Colorado and northern New Mexico receiving the largest totals.

How the Storm Could Affect Travel and Communities

The winter storm may bring flight delays, road closures, and power disruptions in affected states. Low visibility and drifting snow could impact morning and evening rush hours, especially in Colorado and Wyoming. Emergency managers are urging residents to stay off roads during peak snow bands.

Schools in parts of the Mountain West may issue delays or closures depending on Thursday morning conditions. Airline travelers are encouraged to check flight status updates and arrive early due to de-icing operations. Snowplow teams are prioritizing major highways, but mountain routes may remain closed for extended periods.

The weather winter storm warning highlights a significant early-season system bringing widespread snow and travel hazards. Residents in impacted regions are advised to monitor updates and prepare for changing conditions as the storm moves east.

FYI (keeping you in the loop)-

Q1: Which states are under a weather winter storm warning?

Alaska, Colorado, New Mexico, Montana, South Dakota, Wyoming, Maine, and New Hampshire face the highest risks. Totals vary by elevation. Mountain regions will see the heaviest snow.

Q2: How much snow is Colorado expected to receive?

The Sangre de Cristo Mountains may reach 17 inches. Foothill areas could see 6 to 8 inches. Denver and nearby cities expect lighter totals.

Q3: Will travel be affected by the storm?

Yes. Roadways may become slick or blocked due to snow and ice. Air travel may face delays from reduced visibility and aircraft de-icing operations.

Q4: Which regions face the highest wind risks?

Mountain passes in Colorado, Wyoming, and northern New Mexico will see the strongest gusts. Blowing snow may create whiteout conditions.

Q5: When will conditions improve?

Snowfall is expected to ease by Thursday night for most regions. High-elevation areas may see lingering impacts into Friday.

References

Newsweek. (2025). Winter storms bring heavy snow and travel concerns across multiple states. December 2025.

The Mirror. (2025). US states brace for 17 inches of snow as winter storm warnings issued. December 2025.

Associated Press. (2025). National Weather Service issues winter alerts across the Mountain West. December 2025.