A powerful winter storm system has gripped Idaho, dumping heavy snow, creating hazardous travel conditions, and significantly increasing avalanche risks across the state. With multiple winter storm warnings and advisories in effect, meteorologists are urging residents to stay off the roads and avoid dangerous mountain terrain. The National Weather Service (NWS) has warned that snowfall totals could exceed 12 inches in some areas, while strong winds will create whiteout conditions that could make driving nearly impossible. In addition, the Idaho Panhandle and central mountains face a growing avalanche threat, with backcountry travel becoming extremely dangerous.
Treacherous Travel Conditions Expected
As of Saturday, February 17, winter storm warnings remain in place for much of northern and eastern Idaho, while winter weather advisories cover additional regions.
- Big Hole Mountains & Eastern Idaho: An additional 2 to 4 inches of snow is expected, with roads becoming icy and hazardous. Wind gusts up to 30 mph could create drifting snow, reducing visibility.
- Highway 12 (Lowell to Lolo Pass), Elk River, and Pierce: Snowfall continues to pile up, making travel conditions extremely dangerous. Motorists are urged to delay any non-essential travel.
- Boise and Treasure Valley: While snowfall will be lighter in lower elevations, roads could still become slick, especially during early morning and evening hours.
Avalanche Risks Surge as Snow Piles Up
Idaho’s mountain regions are facing a major avalanche threat, particularly in areas that have seen continuous snowfall over the past several days. Experts warn that the heavy snowpack combined with strong winds has created unstable conditions, increasing the likelihood of spontaneous avalanches in backcountry areas.
- Sun Valley & Sawtooth Mountains: The risk of large, destructive avalanches is high, and skiers and snowmobilers are urged to stay out of unmonitored terrain.
- Central Idaho Backcountry: Avalanche forecasters are warning of weak layers in the snowpack, which could trigger large slides capable of burying vehicles, buildings, or anyone in their path.
Regional Weather Forecast
- Boise:
- Saturday: High of 39°F (4°C), with light snow showers and cloudy skies.
- Sunday: A wintry mix of snow and rain, with highs near 42°F (6°C).
- Idaho Falls:
- Saturday: High of 29°F (-2°C) with low clouds and freezing conditions.
- Sunday: Snowfall of 2-4 cm, followed by a rain-snow mix later in the day.
- Coeur d’Alene:
- Saturday: High of 32°F (0°C) with light snowfall and breezy conditions.
- Sunday: More snow expected, with temperatures hovering around freezing.
How to Stay Safe During This Extreme Winter Weather
With snowfall intensifying and avalanche risks rising, it’s critical to take precautions now:
- Avoid Non-Essential Travel: Roads are quickly becoming impassable, and whiteout conditions make driving extremely dangerous. If you must travel, bring an emergency kit with blankets, food, and water.
- Stay Out of Avalanche-Prone Areas: If you’re planning a trip to the mountains, think twice—the risk of deadly avalanches is extremely high. Stick to safe, monitored trails and always check avalanche warnings before heading out.
- Prepare for Power Outages: Heavy snow and ice could snap power lines, leaving thousands without heat or electricity. Stock up on flashlights, extra batteries, and non-perishable food.
- Watch for Hypothermia and Frostbite: With temperatures dipping well below freezing, dress in multiple layers and limit exposure to the cold.
This Storm Is Not Over Yet
This is not just another winter storm—Idaho is facing severe weather conditions that could be life-threatening. Massive snowfall, dangerously icy roads, and avalanche risks will continue through the weekend, making travel and outdoor activities extremely risky. Stay updated on the latest weather alerts, avoid unnecessary travel, and take all warnings seriously—because this storm could turn deadly in an instant.