Wet and Windy Wednesday: High Surf and Mountain Snow Grip San Diego

Commuter Alerts and Active Storm Conditions

San Diego residents should prepare for a challenging day on the roads and at the coast as a winter storm system continues to sweep through the region this Wednesday, February 18, 2026. The National Weather Service has issued several active warnings, including a High Surf Advisory and a series of wind and rain notices that will impact both the morning and evening commutes. Public safety officials are advising motorists to watch for ponding on roadways, particularly in flood-prone areas like Mission Valley.

Morning: Showers and Early Storm Warnings

The morning hours are expected to be the most active part of the day. Early Wednesday morning, parts of northwestern San Diego County were under a Severe Thunderstorm Warning, with radar indicating wind gusts up to 60 mph and torrential rainfall. While the most intense thunderstorm activity is expected to taper off after dawn, a Wind Advisory remains in effect for coastal and inland valley areas until 8:00 AM. Residents can expect:

• Temperatures starting in the low 50s, with a high chance of rain showers during the early commute.
• High humidity levels around 78%, leading to misty conditions in some areas.
• Southwest winds of 25 to 35 mph, with stronger gusts possible on desert mountain slopes.

Afternoon: Cooler Temperatures and Lingering Clouds

As we move into the afternoon, the weather will transition to a mostly cloudy pattern. While the heaviest rain is expected to move inland and toward the mountains, a 37% chance of scattered showers remains for the metropolitan area. The high temperature today will reach a modest 56°F, which is significantly cooler than the seasonal average. Those heading out for afternoon errands should keep their umbrellas handy, as light rain showers are still likely through the midday hours despite the cloud cover.

Evening and Night: Decreasing Rain Chances

The evening forecast calls for predominantly cloudy skies as the primary storm front moves further east. The chance of precipitation drops to approximately 25% after sunset. Temperatures will dip toward an overnight low of 50°F. While the rain may subside, the atmosphere will remain damp, and humidity will stay elevated. Icy conditions are not expected in the city, but damp roads will continue to present hazards for late-night drivers.

High Surf and Mountain Snow Impacts

Beyond the city center, the weather system is creating significant impacts along the coast and in the higher elevations. A High Surf Advisory is currently in effect through Friday, with breaking waves of 8 to 12 feet expected across San Diego County beaches. These conditions create dangerous swimming environments and high risk for rip currents. Meanwhile, in the mountains, snow levels are expected to drop as low as 3,500 to 4,500 feet today, bringing winter driving conditions to local peaks and higher passes along the Interstate 8 corridor.