San Antonio Weather Radar - Live Doppler Map (TX)

🌦️ San Antonio Weather & Live Doppler Radar Guide

San Antonio is located in South-Central Texas along the southern boundary of the Texas Hill Country and the Balcones Escarpment. This unique geological topography makes the San Antonio metropolitan area one of the most flash-flood-prone regions in the entire United States, known nationally as 'Flash Flood Alley.' When warm Gulf moisture collides with elevated terrain along the Balcones Fault, torrential rain clusters can stall and produce devastating flash floods. High-definition Doppler weather radar is indispensable for tracking severe storms and flood warnings across Bexar, Comal, and Guadalupe counties.

📡 NOAA NEXRAD Station: KEWX (New Braunfels / San Antonio, TX)

Our live San Antonio radar connects directly to NOAA's Level-III NEXRAD radar station KEWX, located in New Braunfels, Texas. Operating with S-band dual-polarization technology, station KEWX emits microwave pulses that scan precipitation structure and wind velocity, allowing meteorologists to track dangerous flash flood rainfall rates exceeding 3 inches per hour, large hail, and rotating supercells.

🎨 How to Read Doppler Reflectivity (dBZ Scale)

Radar reflectivity measures precipitation density in decibels of Z (dBZ). Use this color reference when monitoring approaching storms on the San Antonio radar:

⚠️ Seasonal Severe Storm Threats in San Antonio

Spring (March to May) brings violent supercell thunderstorms producing giant hail, destructive microbursts, and isolated tornadoes along dryline boundaries. In late summer and autumn, inland-moving tropical depressions and hurricanes from the Gulf of Mexico can drop catastrophic flooding rains across the San Antonio River basin.