textproduct: Austin/San Antonio

KEY MESSAGES

- Dry weather along with above normal temperatures continue through the weekend and into early next week.

- Elevated heat index values each afternoon, especially along and east of I-35 and across most of the Rio Grande plains.

SHORT TERM

(Today through Wednesday) Issued at 532 AM CDT Tue Jun 23 2026

23/00Z raob data shows mid and upper level high pressure is centered over the desert southwest, with an associated ridge axis extending eastward across far west Texas and into central Texas. In the lower- levels of the atmosphere, surface high pressure over the Gulf with surface low pressure over northern New Mexico will keep breezy southeast winds in place across south central Texas. Strong mixing in the lower levels during the afternoon hours will help lower the dew point temperatures during peak heating. While a few spots may briefly approach heat index values of 108 degrees, these conditions are expected to be brief and isolated in nature. At this time we don't anticipate the need for a Heat Advisory. Highs will be mostly in the 90s, with near 100 along the Rio Grande. Overnight lows will be in the 70s to near 80 degrees.

LONG TERM

(Wednesday night through Monday) Issued at 532 AM CDT Tue Jun 23 2026

The large scale weather pattern will change little through late week as the center of the mid and upper level high pressure slowly drops southward into northern Mexico. While the strength of the ridge should gradually weaken, we expect to see a continuation of dry weather along with above normal temperatures across south central Texas. Elevated afternoon heat index values will persist, especially along and east of I-35 and into the Rio Grande plains. With soil conditions gradually drying and efficient mixing of dew point temperatures in the afternoon, we expect most locations will remain below Heat Advisory criteria. However, residents are still urged to practice heat safety tips during this period of above normal temperatures.

AVIATION

(12Z TAFS) Issued at 532 AM CDT Tue Jun 23 2026

Flat ridging aloft over over TX will allow for a progressive westerly wind flow over Oklahoma, leading to a stronger surface gradient. More gusty winds are expected for today which should keep low levels well mixed. We saw a brief drop to IFR in a couple spots, but MVFR CIGs are expected going forward this morning with the good mixing expected to lift most CIGs to VFR before noon. The pattern doesn't change much for tonight, so there should be a similar low cloud timing trend for late tonight into Wednesday morning.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 95 77 96 75 / 0 0 0 0 Austin Bergstrom Intl Airport 95 77 95 75 / 0 0 0 0 New Braunfels Muni Airport 94 75 94 73 / 0 0 0 0 Burnet Muni Airport 93 75 94 72 / 0 0 0 0 Del Rio Intl Airport 97 77 98 76 / 0 0 0 0 Georgetown Muni Airport 95 76 95 75 / 0 0 0 0 Hondo Muni Airport 92 74 92 72 / 0 0 0 0 San Marcos Muni Airport 95 76 95 73 / 0 0 0 0 La Grange - Fayette Regional 94 76 95 74 / 0 0 0 0 San Antonio Intl Airport 93 76 93 75 / 0 0 0 0 Stinson Muni Airport 93 76 93 75 / 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES

None.