Austin woke up Tuesday to the kind of air that feels like a wet blanket. As of the morning of May 19, 2026, temperatures were near 78°F with dew points in the mid‑70s, leaving things cloudy, muggy, and generally oppressive. A south‑southeast breeze is pumping in more humid air and keeping the cloud deck parked overhead ahead of a late‑day warmup. Highs are expected to reach around 91°F before a line of storms moves in tonight.
Storms Late Tuesday Into Wednesday
A line of strong to potentially severe thunderstorms is expected to move into the Hill Country and then sweep across Austin Tuesday evening into the overnight hours of Wednesday, May 20, 2026. According to the National Weather Service Austin/San Antonio, the main threats are damaging wind gusts and isolated hail. Most spots are looking at 1–2 inches of rain, but pockets could see 3–5 inches, which would be enough to trigger localized flash flooding. Gusty winds in stronger storms, up to about 25 mph, could also knock down a few branches and cause brief power outages.
Timing And Commute Impacts
Showers and a few storms may pop up by late afternoon, but the main line is most likely to arrive Tuesday evening and continue overnight. That timing could snarl evening commutes and wash out outdoor plans. Heavy downpours may quickly cut visibility and cause ponding on roads and underpasses. If you have outdoor events, plan to move them inside if you can, and give yourself extra time to get where you are going tonight.
Heat Then An Active Holiday Stretch
Before the front and storms show up, the day will stay hot and sticky, with heat index values pushing toward the triple digits along parts of the I‑35 corridor and areas to the east. Temperatures are expected to drop into the mid‑80s on Wednesday. Forecasts show this setup hanging around into the Memorial Day weekend, with daily rounds of storms and a growing flood threat as soils become saturated from repeated rainfall. If you have travel or outdoor plans over the holiday, keep an eye on updates.
Where To Cool Off And Safety Tips
Parks and public libraries can double as cooling centers during normal hours, and you can check the City of Austin emergency information hub for specific locations and heat‑safety resources. Avoid strenuous outdoor activity during the hottest part of the day, never leave children or pets in parked cars, and do not drive through flooded roadways. Keep up with local forecasts and alerts, and have a plan in case storms lead to power outages or flooding.
