San Antonio Weather Radar

When does San Antonio experience the most dangerous flash flooding conditions?

San Antonio weather patterns show that flash flooding poses the greatest threat during May through October, when intense thunderstorms regularly sweep through South Texas. The city's unique topography and rapid urban development create conditions where heavy rainfall can quickly overwhelm drainage systems. San Antonio weather data indicates that the most severe flooding typically occurs when slow-moving storms dump 3-5 inches of rain within just a few hours. Historical San Antonio weather records reveal that major flood events happen every few years, with some areas experiencing water depths exceeding 10 feet during extreme events. Residents monitoring San Antonio weather should pay special attention to low-water crossings and creek areas, as these locations can transform from dry channels to raging torrents within minutes during heavy downpours.

What months bring the highest tornado risk to San Antonio and surrounding areas?

San Antonio weather statistics show that tornado activity peaks during April through June, coinciding with the traditional severe weather season in South Texas. While not in the heart of Tornado Alley, San Antonio weather patterns still produce several tornado warnings annually, with most tornadoes rating EF0 to EF2 on the Enhanced Fujita Scale. The volatile San Antonio weather during spring creates ideal conditions for supercell thunderstorms capable of spawning tornadoes, particularly when cold fronts collide with warm, moist air from the Gulf of Mexico. Residents tracking San Antonio weather should have multiple ways to receive warnings, as tornadoes can develop rapidly with minimal advance notice. The afternoon and evening hours typically see the highest tornado potential when San Antonio weather conditions become most unstable.

How extreme does summer heat get in San Antonio and what precautions should residents take?

San Antonio weather during summer months regularly features temperatures soaring above 95°F, with August being the hottest month averaging highs of 96°F. The combination of high temperatures and humidity in San Antonio weather creates dangerous heat index values often exceeding 105°F. Extended heat waves are common in San Antonio weather patterns, sometimes lasting two weeks or more with minimal overnight relief. The urban heat island effect makes downtown San Antonio weather even more intense than surrounding areas. Health officials monitoring San Antonio weather advise residents to limit outdoor activities during peak afternoon hours, stay hydrated, and check on elderly neighbors during extreme heat events. San Antonio weather forecasts show that climate change is increasing both the frequency and intensity of these dangerous heat waves.

When and why do damaging hailstorms strike San Antonio most frequently?

San Antonio weather data reveals that severe hailstorms occur most often during March through May, when atmospheric conditions favor strong updrafts in thunderstorms. These powerful storms in San Antonio weather can produce hailstones ranging from quarter-size to baseball-size, causing millions in property damage annually. The unique San Antonio weather patterns that generate hail involve supercell thunderstorms with rotating updrafts strong enough to suspend ice particles aloft for extended periods. Residents should monitor San Antonio weather alerts closely during spring months, as hail-producing storms often develo