Alamo City Alert: Severe Storms and Large Hail Threaten After a Warm, Muggy Tuesday

Morning Fog and Humid Conditions

San Antonio residents woke up to a thick blanket of humidity and patchy dense fog this Tuesday morning, March 10, 2026. The National Weather Service (NWS) reported visibility dropping to less than a quarter-mile in several areas across Bexar County. This muggy start saw temperatures hovering in the low to mid-60s through 8:00 a.m. Commuters were advised to exercise caution on area roadways, using low-beam headlights and maintaining extra distance between vehicles as the fog persists until approximately 10:00 a.m.

A Warm and Quiet Afternoon

As the morning fog lifts, the city will experience a steady climb in temperatures. By 11:00 a.m., the thermometer is expected to reach the 70-degree mark, eventually topping out in the low to mid-80s by the late afternoon. Highs are forecast to hit approximately 82°F to 85°F. While the majority of the daylight hours will remain quiet and warm, atmospheric moisture levels are rising. There is a 30% to 40% chance of isolated showers or weak thunderstorms throughout the early afternoon, though most of the region will stay dry until the evening arrival of a significant weather system.

Severe Storm Risks Tonight

The primary concern for today is a strong cold front and upper-level disturbance moving in from the west. Meteorologists from Your Weather Authority warn that a line of storms will reach the San Antonio metro area after 9:00 p.m. The NWS has placed the region under a Level 2 to 3 risk for severe weather. Potential hazards include:

• Large Hail: Hailstones up to 2 inches in diameter are possible, which can cause significant property damage.
• Damaging Winds: Wind gusts of 70 to 75 mph are expected along the leading edge of the storm line.
• Isolated Tornadoes: While the highest risk remains west of the city in the Hill Country, an isolated tornado cannot be ruled out for Bexar County.
• Heavy Rainfall: Most areas will receive between 0.25 and 0.5 inches of rain, though localized flooding is possible in low-lying areas where rainfall could reach 1 to 3 inches.

Looking Ahead

The stormy conditions are expected to clear by 8:00 a.m. Wednesday morning. Temperatures tonight will drop to an overnight low of 59°F. Following the passage of the cold front, San Antonio will transition into a much cooler and quieter pattern for the remainder of the week. Residents are encouraged to secure outdoor items and ensure they have a reliable method for receiving weather alerts throughout the night.