THERE ARE TWISTERS ALL OVER TEXAS. I DON'T EVER REMEMBER HEARING OF ONE HITTING ON SAN ANTONIO. THERE IS ONE MENTIONED THAT HAPPENED IN 1930. IN SEARCHING I CAME ACROSS THIS LITTLE BLURB ON CLIMATE. I THINK THE AREA WHERE TWISTERS ARE MORE COMMON ARE WHERE TORNADO ALLEY IS AND I THINK THATS UP CLOSE TO THE NORTHERN BORDER-RED RIVER AREA AND AS YOU GO SOUTH THE FREQUENCY DROPS OFF. I'LL DEFER TO SOMEBODY LIKE NOAH WHO WOULD KEEP RECORDS ON THAT, I BELIEVE.
Climate
Courtesy: San Antonio Convention and Visitors Bureau
In 1691 Spanish explorers discovered what Native Americans called Yanaguana, the "refreshing waters" of a river. They promptly named that river "San Antonio," in honor of the feast day of St. Anthony.
Historic descriptions of the scenery include a lush landscape of wild grapes and cypress trees. While the setting paints a beautiful picture, if it is at all true, credit can only be given to the river itself, for the climate would not allow it.
San Antonio only sees a modest 29 inches of average annual precipitation. That's enough to grow crops, but not enough to produce a thriving terrain. Only a few inches of deficiency in a year can result in crop-devastating drought.
Although no month is particularly wet, December through March are the driest. January sees an average of 1.6 inches as opposed to May, which picks up 4.
Thunderstorms generally strike from April through September. Hail beats down on San Antonio during the spring. Winter precipitation falls mostly in the form of light rain and drizzle, though snow graces the land about once every three or four years.
Temperatures run the gamut from the single figures to triple digits. Over the last 48 years, the mercury rose as high as 108 degrees Fahrenheit and hit its lowest mark at 0.
Tropical cyclones can even affect the city. One of the fastest wind gusts ever recorded was 74 mph, thanks to a tropical storm in August of 1942. But the old enemy of Bexar County is the tornado. One per year has struck, on average, since 1953. The strongest twister this county has seen hit in 1953. It was an F4, with winds estimated between 207 and 260 mph.
I DID FIND MORE GOOD STUFF AT THIS WEBSITE BUT IT DOESN'T COPY VERY WELL. IT SPLITS IN TO TWO PIECES. TRY IT. SPELLCHECK ISN'T WORKING NOW EITHER.
http://www.texas-
ec.org/publications/texascooppower/archive/499sports.aspx