textproduct: Austin/San Antonio

KEY MESSAGES

- Flood Watch remains in effect for portions of the Coastal Plains through this evening with pockets of heavy rainfall and high hourly rainfall rates expected at times.

- Dry weather conditions are forecast for most of South Central Texas middle of the week. Rain chances return Friday and continue into the weekend.

- Warm and humid conditions return middle of the week and persist into next week. Thursday is likely to be the hottest day of the next several.

SHORT TERM

(Today through Wednesday) Issued at 134 AM CDT Tue Jun 16 2026

Currently PWATs still are in the 2 to 2.4in range from the I-35 Corridor on eastward with highest PWATs over the Coastal Plains. The front responsible for all the heavy rainfall last night has stalled and is currently bisecting our area from Maverick County northeastward along and just west of the I-35 Corridor. We expect a lull in activity tonight as most of the area has been worked over from earlier this morning. That said the potential tropical disturbance located over northern Mexico is poised to slowly move east northeastward over deep south TX. Many hurricane models continue to show an east-northeastward track before moving just over the Gulf. Afterwards models show the disturbance moving north- northeastward and continuing hugging the TX coast. With this type of track we may get some heavier bands moving across our Coastal Plains and far southern counties in the Rio Grande today as the disturbance makes its closest approach. Otherwise most of the heavier rainfall should remain south of us. Regardless any thunderstorms that can tap into this abundant tropical moisture will be capable of producing torrential downpours with 2-3 inch rates per hour certainly possible anywhere over the Coastal Plains and perhaps into Rio Grande where a Flood Watch remains in effect through this evening. Recent Hi-res guidance seems to be on board with this scenario with most showing additional totals in the 1-3 inch range across the aforementioned areas. It should be stressed that any wobbles in this track or slight jogs northward and we could see heavy rainfall much further north into our area thus increasing the heavy rainfall and flash flooding threat. Soils across the area remain saturated so it would take even less rainfall to exacerbate and cause renewed flooding concerns.

Eventually the frontal boundary and tropical disturbance push out of and away from our area taking the rain and storm chances with it. Dry air will accompany this on the backside allowing most of area to dry out starting Wednesday. Moisture remains but should be on the downward trend. As a result temperatures will warm back up into the low 90s with mid 90s possible across the Rio Grande. Heat indices will start to become elevated as well with the combination of high moisture and hotter temps we could see heat indices in the 100-105 degree range.

LONG TERM

(Wednesday night through Monday) Issued at 134 AM CDT Tue Jun 16 2026

Drier weather continues into Thursday and depending on how far east the tropical disturbance gets we could see temps really ramp up with the return of triple digits not out of the question across our western areas. We will need to monitor this closely as this heat combined with remaining moisture across the area could push heat indices well above 110 to perhaps 115 degrees. Certainly something to watch as we would likely need to issue heat products if this trend continues for Thursday.

We don't remain hot for long as global models continue indicating some sort of an upper level disturbance and/or convective outflow/front moving across our area Friday into the weekend. Scattered rain and storm chances are then forecast to spread over the region with isolated heavier downpours possible once again.

Regarding temperatures, we should see highs back to near 90 Friday and Saturday with low to mid 90s possible Sunday and beyond. Thus the prospects for heat remain as we warm right back up towards the latter part of the weekend. It will still feel very warm however as abundant moisture sticks around. We could still see heat indices anywhere from 100 to 109 degrees. Remember to continue to practice safe heat safety.

AVIATION

(12Z TAFS) Issued at 634 AM CDT Tue Jun 16 2026

VFR conditions are forecast for all local area sites for the most part throughout the day and evening. Can't rule out a few hours of MVFR along the I-35 corridor mid morning. Otherwise, light and variable winds are forecast for this morning with a northeast to east flow dominating the I-35 corridor for most of the day and a light and variable wind flow at KDRT through the evening. MVFR cigs are anticipated for the I-35 corridor by midnight tonight and continuing overnight.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 88 74 92 77 / 50 0 0 0 Austin Bergstrom Intl Airport 87 74 91 77 / 50 0 0 0 New Braunfels Muni Airport 86 72 91 75 / 50 10 0 0 Burnet Muni Airport 87 72 92 76 / 10 0 0 0 Del Rio Intl Airport 93 74 97 78 / 0 0 0 0 Georgetown Muni Airport 87 73 91 76 / 30 0 0 0 Hondo Muni Airport 87 72 92 76 / 30 10 0 0 San Marcos Muni Airport 86 73 91 76 / 50 10 0 0 La Grange - Fayette Regional 84 74 89 77 / 70 10 20 0 San Antonio Intl Airport 86 74 91 77 / 40 0 0 0 Stinson Muni Airport 86 73 91 77 / 60 10 0 0

EWX WATCHES/WARNINGS/ADVISORIES

Flood Watch through this evening for TXZ209-222>225.