San Diego, CA – Drivers across Southern California should prepare for a disruptive midweek as thunderstorms move into San Diego by Wednesday, September 17. Heavy rain, gusty winds, and lightning could impact commutes on I-5 and other key roadways. Officials urge residents to avoid unnecessary travel during peak storm hours.
According to the National Weather Service, showers and thunderstorms are expected after 11 a.m. Wednesday, with a 90 percent chance of precipitation. New rainfall could range between a quarter and half an inch, creating slick conditions for drivers across San Diego County. Winds will increase from the west at 10 mph, raising hazards for high-profile vehicles along coastal routes.
Communities from Chula Vista to Escondido should brace for potential delays, localized flooding, and reduced visibility. Outdoor events and activities could be interrupted by lightning and sudden downpours. Residents should secure loose items, charge devices, and plan alternate routes before conditions worsen.
By Wednesday night, showers remain likely with a 50 percent chance of thunderstorms. Thursday keeps storm chances alive at 50 percent before tapering to slight chances into Friday. Patchy morning fog will add another layer of travel concern, especially near coastal highways.
The unsettled stretch eases into the weekend, with partly sunny skies returning Saturday and Sunday. Still, the National Weather Service cautions that pop-up showers remain possible through early Friday, so keeping an eye on updated alerts is essential.
Warnings remain in effect through Wednesday evening, with the possibility of additional advisories if storm intensity increases.
Five Day Forecast for San Diego, CA
- Wednesday: High 79, thunderstorms likely, heavy rain possible.
- Thursday: High 80, showers and storms possible, humid.
- Friday: High 78, slight storm chance, partly sunny.
- Saturday: High 79, mostly sunny, calmer conditions.
- Sunday: High 79, dry, sunny skies dominate.
