San Antonio Weather Radar
San Antonio Live Weather
San Antonio Live Weather Radar
San Antonio Hourly Weather Forecast
San Antonio 7-Day Weather Forecast
San Antonio Weather Overview
San Antonio weather radar tracks storms across south-central Texas, where the Balcones Escarpment creates one of North America's most flash-flood-prone zones. Live doppler weather radar for San Antonio Texas shows precipitation moving from the Gulf of Mexico toward the Edwards Plateau, often triggering sudden severe thunderstorms with heavy rain, large hail, and damaging winds.
The San Antonio weather radar map updates every 10 minutes, displaying real-time storm cells approaching the metro area. Weather radar San Antonio TX is essential for tracking flash floods — the region's deadliest threat. In October 1998, over 20 inches of rain fell in 48 hours, killing 31 people. The escarpment funnels rainfall into narrow creeks that rise several feet within minutes. Doppler weather radar San Antonio helps residents monitor storm movement and avoid flooded low-water crossings during spring and fall thunderstorm seasons.
Summer heat dominates San Antonio radar weather from June through September, with temperatures exceeding 100°F and heat index values climbing even higher. The all-time record of 111°F was set in September 2000. Live weather radar San Antonio also tracks rare winter storms — February 2021's Winter Storm Uri brought subfreezing temperatures and days without power across the city. Whether monitoring severe weather or planning outdoor activities, San Antonio weather radar provides the real-time tracking and hourly forecasts needed to stay safe in this volatile climate zone along the Balcones Escarpment.
San Antonio Weather Risks & Safety
Flooding & Flash Flood Risk
Flash flooding is San Antonio's most persistent weather hazard. Slow-moving thunderstorms or tropical moisture can dump enough rain to overwhelm drainage systems within hours — especially in paved urban areas where water has nowhere to go. Check the radar to see where the heaviest rain is falling and which areas to avoid. The standing rule: turn around, don't drown. Never drive through flooded roads, even if they look shallow.
Severe Thunderstorm Risk
Severe thunderstorms roll through San Antonio regularly, especially spring through early fall. Expect damaging winds above 58 mph, large hail, and dangerous lightning. The radar shows you each storm cell's position, movement, and intensity — so you can tell if one is headed your way. When a thunderstorm warning drops for San Antonio, get indoors and away from windows until it passes.
Extreme Heat Risk
Summers in San Antonio get dangerously hot — heat indices regularly push past 100°F, and heat waves can last for weeks. When the radar shows clear skies with no storm activity for days, that usually means the heat is building. Outdoor workers, elderly residents, and anyone without reliable AC are most at risk. Stay hydrated, avoid outdoor activity during peak afternoon hours, and check on neighbors who might be struggling.
Tornado Risk
Tornadoes hit San Antonio hardest in spring and early summer, when warm Gulf air slams into cooler northern fronts. Supercell thunderstorms can spin up EF2+ tornadoes with very little lead time. On radar, rotation signatures inside storm cells give you a few critical minutes to reach shelter. San Antonio averages several tornado warnings per year — know where your safe room or interior closet is before you need it.
How to Use San Antonio Weather Radar
Check Current San Antonio Weather
Look at the weather status bar at the top of the page for real-time temperature, humidity, and wind speed in San Antonio. During summer, watch for extreme heat warnings — triple-digit temperatures are common from June through September.
Watch the San Antonio Doppler Radar Map
The radar map shows precipitation moving across San Antonio and the Balcones Escarpment. Play the animation to track thunderstorm cells and heavy rain bands — flash flooding develops fast when storms stall over the escarpment's narrow creek channels.
Review the San Antonio Forecast
Scroll to the hourly and 7-day forecast for San Antonio. Look for severe thunderstorm risks during spring and heavy rain totals that could trigger flash flooding. Check both radar and forecast together before making outdoor plans in South Texas.
Decide and Act
Heavy rain cells approaching San Antonio? Avoid low-water crossings and flood-prone creeks. Extreme heat advisory in effect? Limit outdoor time during peak afternoon hours. Bookmark this page — San Antonio weather shifts fast when Gulf moisture surges inland.
Who Benefits from San Antonio Weather Radar
Commuters & Drivers
San Antonio commuters on I-35, I-10, Loop 410, and US-281 face flash flooding at low-water crossings and sudden severe thunderstorms that reduce visibility to near zero. Check the radar before your drive to see where heavy rain cells are tracking across the metro.
Outdoor Enthusiasts
Walkers along the San Antonio River Walk, hikers at Government Canyon and Friedrich Wilderness Park, families at Brackenridge Park — check the hourly forecast first. Flash floods develop fast along the Balcones Escarpment, and the radar shows storm cells 30 minutes before they reach you.
Event Planners & Families
Planning a visit to The Alamo, a game at the Alamodome or AT&T Center, or an evening in the Pearl District? The 7-day forecast helps pick the best day. On event day, radar shows exactly when thunderstorms will cross downtown San Antonio.
Outdoor Workers
Crews at Joint Base San Antonio, teams at Port San Antonio, and staff commuting to South Texas Medical Center — check the radar before scheduling outdoor work. Extreme heat, flash flooding, and lightning from fast-developing thunderstorms strike with little warning from May through October.