textproduct: Austin/San Antonio

KEY MESSAGES

- Level 1 of 4 risk of Excessive Rainfall central part of South- Central Texas today. Locally heavy rain up to 3" possible.

- Soggy Monday likely for most and for the eastern two-thirds of the area again on Tuesday.

- Cool weather continues into Tuesday with near normal temperatures Wednesday and a warming trend for late week.

SHORT TERM

(Today through Tuesday) Issued at 1229 AM CDT Mon Apr 20 2026

Showers and isolated thunderstorms are currently ongoing across the area at this hour with activity expected to continue and increase in coverage as the main disturbance responsible slowly shifts eastward. At the same time, the upper-level ridging responsible for keeping our northern and eastern CWA areas dry is moving off to the east. This will result in additional overrunning and development of widespread showers continuing into daybreak this morning. Most activity is expected to remain fairly light. However, the atmosphere is very moist and as such the HREF PMM 24 hour QPF is still showing a wide swath of 1-2 inches for our area. So any heavier cells could certainly take advantage of this as there remains some instability aloft. Temperatures look to stay fairly cool for this time of year as many areas remain locked under showers and thick cloud cover with areas remaining in the 50s and perhaps mid 60s. Another round of rain showers along with isolated thunderstorms looks set to impact the eastern two thirds of our area heading into Tuesday with rain cool air and CAA once again helping to limit afternoon high temperatures with most barely hitting 70 degrees. Main exception would be for those under a developing shortwave ridge out west. As a result, areas across the Rio Grande plains can expect to see highs in the mid to upper 70s.

LONG TERM

(Tuesday night through Sunday) Issued at 1229 AM CDT Mon Apr 20 2026

Tuesday night we should see rain chances decrease somewhat before a second wave of energy moves back into the area helping to kick off more showers and isolated storms with our overrunning/isentropic lift type pattern continuing into early Wednesday. We finally start to dry out by Wednesday afternoon with areas along and east of I-35 continuing to see the highest rain chances. All activity should finish by Wednesday night as most precipitation finally pushes off to the east and out of our area. Thursday and Friday should be a much drier days as southerly low level flow returns and with it the possibility for some isolated streamer showers over the Coastal plains on Friday. Temps should warm up nicely back into the mid 80s on thursday and into the upper 80s by Friday. Our quieter and drier weather is short lived as a trough out west begins to deepen helping to bring us back into southwest flow. As a result, thunderstorms appear possible for both Saturday and Sunday given the setup in place.

AVIATION

(12Z TAFS) Issued at 549 AM CDT Mon Apr 20 2026

The ceiling at DRT is bouncing between IFR and MVFR. The Austin and San Antonio airports are VFR with occasional light showers. The San Antonio airports will drop to MVFR within the next hour or two while AUS will stay VFR until this afternoon. IFR ceilings are likely at all terminals this afternoon and then stay that way for the rest of the period. There will be occasional rain at all terminals that will lower visibility at times. No improvement through the end of this period.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 65 58 69 64 / 90 80 90 40 Austin Bergstrom Intl Airport 65 57 69 63 / 90 80 90 40 New Braunfels Muni Airport 65 57 70 63 / 90 80 90 40 Burnet Muni Airport 62 55 66 61 / 80 80 90 40 Del Rio Intl Airport 62 59 76 66 / 70 60 20 20 Georgetown Muni Airport 63 56 66 61 / 70 80 90 40 Hondo Muni Airport 61 57 71 64 / 90 80 70 40 San Marcos Muni Airport 65 57 69 63 / 90 80 90 40 La Grange - Fayette Regional 67 59 71 64 / 60 70 80 40 San Antonio Intl Airport 63 59 70 65 / 90 80 80 40 Stinson Muni Airport 63 59 72 66 / 90 80 80 40

EWX WATCHES/WARNINGS/ADVISORIES

None.