Winter Storm Warning Issued for San Bernardino County Mountains Through Thursday Morning

Alert Details

The National Weather Service in San Diego has issued a Winter Storm Warning for the San Bernardino County Mountains. The alert is effective from 10:00 AM PST on Monday, February 16, through 9:00 AM PST on Thursday, February 19.

Affected Areas

This warning specifically impacts the San Bernardino County Mountains. Impacted travel routes may include I-15 near the summit of the Cajon Pass, particularly on Wednesday and Thursday mornings.

What You Should Do

Residents and travelers are advised to prepare for hazardous conditions. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Travel could be very difficult to impossible, potentially impacting Monday morning and evening commutes. For the latest road conditions, call 511.

Expected Conditions

Significant snow accumulation and high winds are forecast across multiple rounds:

• Snowfall Totals (Monday - Tuesday morning): 6-10 inches between 6,000-7,000 feet; 10-18 inches between 7,000-8,000 feet; and up to 30 inches above 8,000 feet.
• Snowfall Totals (Tuesday night - Wednesday morning): An additional 8-15 inches expected between 6,000-7,500 feet.
• Wind Speeds: Initial south winds will gust between 40-60 mph on ridges and desert slopes. Stronger southwest winds with gusts in excess of 70 mph are possible late Tuesday and Wednesday.
• Snow Levels: Starting around 6,800-7,500 feet on Monday, levels will fall to near 5,000 feet by early Tuesday and approximately 4,000 feet by Wednesday morning.

Timeline

• Monday, Feb 16 (10:00 AM): Warning begins as the first round of heavy snow arrives.
• Tuesday, Feb 17: Occasional light snow showers during the day, followed by widespread moderate snow late Tuesday.
• Wednesday, Feb 18: Moderate snow continues through the morning with peak wind gusts.
• Thursday, Feb 19 (9:00 AM): Warning expires following light snow showers and a few additional inches of accumulation.