Umbrellas Needed: Heavy Rain and Afternoon Thunderstorms Sweep into San Francisco

Umbrellas Needed: Heavy Rain and Afternoon Thunderstorms Sweep into San Francisco

San Francisco residents are waking up to a significant shift in weather this Tuesday, February 10, 2026. As a powerful storm system originating from the Pacific Northwest makes its way across the California coast, the city is bracing for a day of widespread rainfall, gusty winds, and the potential for isolated thunderstorms. After a relatively mild start to the week, this upper-level storm is expected to track directly over the peninsula, bringing much-needed but heavy precipitation to the region.

A Morning of Increasing Clouds

The early morning hours will begin with mostly cloudy skies and relatively calm conditions. However, the window for outdoor activities without rain gear will be short. As the morning progresses, clouds are expected to thicken and lower, signaling the approach of a weak surface low-pressure system. Temperatures during the morning commute will likely hover in the low 50s, with humidity levels rising as the air becomes increasingly saturated and the atmosphere turns unstable.

The Afternoon Intensity: Rain and Thunder

The weather is forecast to turn significantly more active starting Tuesday afternoon. Forecasters anticipate that rain will begin to spread across the city by midday, intensifying as we move into the late afternoon hours. There is a strong likelihood of widespread rainfall, with San Francisco expected to receive approximately half an inch of rain before the day is done. Perhaps more notable is the risk of thunderstorms; meteorological data indicates that atmospheric instability could lead to brief but heavy downpours, small hail, and sudden wind gusts between the afternoon and early evening.

Evening Outlook and Wind Advisories

The wet pattern will persist well into the evening and overnight. While the steady rain may transition into intermittent showers, the wind will become a primary concern. Strong south winds are expected to strengthen by midday and peak late Tuesday evening. While the most intense gusts of 35 to 45 mph are predicted for the higher terrain and coastal ranges, residents in the city's windier corridors should be prepared for blustery conditions that could make travel difficult. The overnight low is expected to settle around 50°F, while the daytime high will reach a peak of approximately 59°F.

Safety and Travel Precautions

With the combination of rain, potential hail, and wind, residents are encouraged to take the following precautions:

• Commute with Caution: Wet roads and heavy downpours during the evening rush hour could lead to hazardous driving conditions and minor flooding in low-lying areas or near small creeks.
• Secure Outdoor Items: Ensure that patio furniture, trash bins, and other loose items are secured before the evening wind peaks to prevent damage.
• Watch for Hail: Be aware that afternoon thunderstorms may produce small hail, which can create suddenly slick surfaces on sidewalks and roads.

This storm serves as the opening act for a series of weather systems expected to impact Northern California throughout the week. San Franciscans are advised to stay dry, keep umbrellas close at hand, and monitor local updates as the storm intensifies tonight.