Austin

Muggy Austin Morning Poised To Explode Into Stormy Sunday

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Published on April 12, 2026
Muggy Austin Morning Poised To Explode Into Stormy SundaySource: City of Austin

Fog and sticky air are hanging over Austin this Sunday morning, with visibility down to around five miles at local observation sites and temperatures parked in the upper 60s to low 70s. Forecasters expect showers and thunderstorms to bubble up and roll through between roughly 7 a.m. and 4 p.m., pushing the afternoon high to around 79°F. The stronger storms could pack brief but heavy downpours, frequent lightning, and gusty southeast winds, with gusts in the mid 20s to mid 30s mph in spots. Drivers should be ready for reduced visibility and ponding on low-lying roads during the commute.

Timing And Hazards

Showers and thunderstorms are favored from Sunday morning into midafternoon, with the National Weather Service Austin/San Antonio highlighting the risk of heavy rain and isolated severe storms along and west of the I-35 corridor. Daytime rainfall totals of three-quarters to one inch are on the table, with another half to three-quarters of an inch possible overnight in a few locations. Slow-moving storms could drop even more in isolated pockets. The main concerns are localized flash flooding where storms stall and short bursts of damaging wind or large hail inside the strongest cells.

Commute And Outdoor Plans

The mix of morning fog and sudden heavy rain is likely to slow traffic and turn some bridges and underpasses slick. Expect delays on I-35, MoPac, and other busy routes, and give yourself extra time to get around. Operations near Bergstrom may also be affected at times by low ceilings and heavy showers, so check with your airline before heading to the airport and think about pushing back any nonessential trips. A forecast earlier this week that flagged pop-up downpours and gusty winds along the same corridor has largely carried over into today, and local traffic pages as well as city alerts will post updates as conditions change.

Rest Of The Week

The humid and unsettled setup sticks around into next week, with highs rebounding into the mid 80s on Monday and a warming trend sending readings into the upper 80s and near 90°F by Friday. Scattered afternoon and evening storms remain in play through midweek, and any storm that pops in the muggy air mass can squeeze out heavy rain in a hurry and trigger localized flooding. Keep local weather alerts turned on and follow official forecasts if you have weather-sensitive plans or travel later in the week.

Austin-Weather & Environment