Key takeaways
- A powerful storm system is bringing severe 80 mph crosswinds and heavy mountain snow to the Pacific Northwest and Northern Rockies today.
- Drivers of high-profile vehicles face extreme blowover risks on exposed highways and mountain passes.
- The system will transition into a fast-moving clipper by Monday, bringing a slick wintry mix and hazardous driving conditions to the Northern Plains and Upper Midwest.
Severe winds and blow over risks in the Northern Rockies
The most immediate hazard for motorists this Sunday is the threat of extreme wind. According to the National Weather Service, an energetic system is pulling deep Pacific moisture inland, but the atmospheric pressure gradient poses the greatest danger. Wind gusts across the Northern Rockies are forecast to reach up to 80 mph today. For anyone driving on exposed interstates, these are localized hurricane-force gusts. Drivers of high-profile vehicles, including commercial semi-trucks, lifted SUVs, and vehicles towing trailers, face a significant increase in the risk of blowover. When navigating these routes, it is vital to keep both hands on the steering wheel, reduce speed to maintain aerodynamic stability, and anticipate sudden lateral shoves when passing other large vehicles or emerging from mountain tunnels.
Heavy mountain snow impacts Pacific Northwest passes
While the lower elevations and coastal areas of the Pacific Northwest are dealing with heavy, pooling rain and hydroplaning risks, the higher elevations are seeing a completely different threat. Significant snow accumulation is actively burying major mountain passes. Motorists attempting to cross the Cascades or navigate the higher terrain of Idaho and Montana must be prepared for winter driving conditions to return in full force. Road crews will be working to keep the major arteries clear, but drivers should expect sudden chain controls to be implemented. If your vehicle is not equipped with severe snow service-rated tires, you will likely lose traction on the steepest grades. The National Oceanic and Atmospheric Administration at noaa.gov continuously updates road weather conditions, and checking these alerts before heading into the mountains is essential for your safety today.
A messy Monday commute for the Upper Midwest
This massive weather system is not staying stationary. By Monday, the energy from this storm will push eastward, transitioning into a fast-moving clipper system. This low-pressure front will drop into the Northern Plains and the Upper Midwest just in time for the start of the work week. While it will not bring the extreme 80 mph winds seen in the Rockies, it will introduce a highly deceptive wintry mix to the region. The transition from rain to snow, combined with a sharp drop in temperatures, means drivers in the Dakotas, Minnesota, and Wisconsin need to be on high alert for black ice. Bridges and overpasses will be the first surfaces to freeze, creating slick spots that can easily catch Monday morning commuters off guard and lead to dangerous chain reaction collisions.
Pre-trip vehicle inspections for changing climates
Transitioning from heavy coastal rain to freezing mountain passes puts your vehicle under unique strain. Before starting your engine, ensure your windshield wipers are not degraded, as heavy snow and rain will instantly blind you if your wiper blades cannot clear the glass. You must also check your tire pressure. As temperatures plummet in the higher elevations, your tire pressure will drop significantly, reducing your contact patch and increasing your risk of losing control on icy asphalt. Always keep a dedicated winter emergency kit in your trunk, especially when traveling through remote stretches of the Northern Rockies where cell service is limited and tow truck response times can stretch into hours.
Â
