Winter Weather Advisory: Sierra Nevada, Southern California Mountains See Heavy Snow and Travel Warnings

A Winter Weather Advisory is in effect as heavy snow continues to impact travel across the Sierra Nevada and Southern California mountains. Recent conditions have left mountain roads icy, prompted chain restrictions, and produced accumulation measured in feet in some communities, making preparation essential for anyone planning to head up.

Winter Weather Advisory: Chain requirements and driving guidance for Southern California mountains

After a series of storms, Southern California is beginning to dry out, but significant snow remains in higher terrain. Up to three feet of snow has fallen in areas such as the San Bernardino Mountains over the past few days. Most roads ascending to mountain communities remain icy, and a level 2 chain requirement is in place across those mountain roads.

• Chain rule scope: Chains or traction devices are required for all cars except vehicles with four-wheel drive or all-week drive that have four snow-tread tires; those vehicles are still required to carry chains in case conditions worsen.
• Enforcement: Drivers without chains attempting to head up have been turned away by patrol officers on mountain approaches. Several motorists who arrived without prior experience were compelled to fit chains on the spot.
• Driving safety: With clearing skies expected, overnight lows can drop sharply and create potential black ice. A cautious speed recommendation of 25 mph has been suggested for affected roads.
• Preparedness: Travelers should carry extra water, food, and blankets in case of delays or becoming stranded.

Sierra Nevada travel troubles and what to expect

Travel troubles are widespread across the Sierra Nevada as snow continues to pile up. Mountain passes and routes are experiencing hazardous conditions that have impacted movement and required precautionary measures. Motorists planning travel through or into mountain areas should anticipate icy stretches and the possibility of restricted access until conditions improve.

Because conditions remain changeable, those who must travel into high country are advised to be prepared for slow, cautious progress and to have necessary traction equipment ready. It is prudent to expect colder temperatures overnight and the associated risk of black ice on cleared pavement, which can make even familiar routes treacherous.

Practical checklist for mountain travel during the advisory

• Confirm that chains or traction devices are onboard and that you know how to install them.
• Verify your vehicle’s traction capability: four-wheel drive or all-week drive with four snow-tread tires may be exempt from immediate installation but must still carry chains.
• Pack essentials: water, nonperishable food, warm blankets, and a charged phone or means of communication.
• Drive slowly on icy stretches; be alert for black ice during overnight and early morning hours.
• Be prepared to turn back if officers restrict access at chain control points or if conditions appear unsafe.

Recent developments show heavy snow and icy roads remain a concern across both the Sierra Nevada and Southern California mountains. Those planning mountain travel under this Winter Weather Advisory should treat conditions as hazardous, follow chain requirements, and prioritize preparedness. Details may evolve as conditions change.