Saturday morning, June 20, San Antonio wakes up to light rain, temperatures in the low 70s (about 73°F), and a light southeast breeze. Showers and a few thunderstorms are likely into mid-morning, with pockets of heavier rain that could briefly knock down visibility on area roads. Skies should partly clear later, and the heat snaps right back, with highs expected in the low 90s by this afternoon.
Storms This Morning, Heat After
Overnight storm complexes near the Rio Grande may slide into the metro this morning, with the greatest flash flood concern along and south of the I-10/US-90 corridor. A few stronger cells could briefly drop rain at rates of 2 to 3 inches per hour. Overall chances of showers and thunderstorms sit near 50 percent this morning, with many spots picking up a quarter to a half inch of new rain while the afternoon high climbs to about 91°F and the heat index may top near 101°F.
Sunday looks drier but still hot, with highs near 94°F and heat indices in the low 100s to around 106°F. South winds could gust as high as 25 miles per hour at times. For the latest forecast details and the overnight discussion from forecasters, see the National Weather Service Austin/San Antonio.
Safety, Travel And Cooling Options
If you encounter standing water, turn around and do not drive through it, and plan on a wet commute into the late morning. With the heat cranking back up after the showers, drink water, limit strenuous outdoor activity in the afternoon, and check on neighbors who are vulnerable to heat.
The City of San Antonio maintains an interactive list of cooling sites and practical heat safety tips if you need relief during hot afternoons. For local resources, see the City of San Antonio.
Recent Coverage
This unsettled pattern has been hanging around San Antonio all month, and Hoodline's June 10 write-up has more background on the flood risk and what forecasters are watching. For context and some longer-range notes about early-week rain potential, see our earlier piece Spurs mania meets soaked streets. We will update this story if watches or warnings are issued.
