textproduct: Austin/San Antonio

KEY MESSAGES

- Rain to retreat south today with dry air building into most areas; light showers to remain possible south of Highway 90.

- Rain and storms to rebound north again Sunday evening with rain likely Monday and likely again for the eastern two-thirds of the area Tuesday.

- Cool weather continues into Tuesday with near normal temperatures Wednesday.

SHORT TERM

(Today through Monday) Issued at 1245 AM CDT Sun Apr 19 2026

Much lower impact weather is expected for today as the rain and thunder chances move mostly out of the forecast area. Some residual shower could continue over the Rio Grande Plains and lower Coastal Prairies but a drier airmass invades the higher terrain areas and down across much of the I-35 Corridor. With dry dewpoints moving into the Hill Country we'll see some chilly morning lows in the 40s there, but cloud cover will make the cold air less effective in moving south of the escarpment. Today's highs will also be moderated by cloud cover with our coolest makes possibly being over the southwest counties where there might still be rain as well.

This evening the pattern shifts again and overrunning of the frontal inversion increases back northward. Initially a shortwave ridge over TX blocks the moisture return, but upstream troughing will be effective in nudging the shortwave ridge eastward by Monday. Prior model runs depicted the front to be more effective and maintaining a deep inversion into Monday, but the latest runs show a weaker and more shallow front that will allow for some good overrunning rains. With more cloud cover returning to all areas, the highs for Monday should be cooler than Sunday for most areas. Best post-frontal QPF amounts may have already occurred overnight, but there does appear to be a fair amount of moisture that could generate a few strong storms and locally heavy downpours over 1 inch. There could be a few areas, like Pandale for example, that will not see any meaningful rain through this period, but most areas should get at least 1/4 between early this morning and Monday afternoon.

LONG TERM

(Monday night through Saturday) Issued at 1245 AM CDT Sun Apr 19 2026

Areas east of I-35 have been hit and miss on the rains over the last few events, and the start of this one hasn't been much different. Tuesday could be the day for the market correction if that market is rain. Some of WPC's highest QPF amounts are saved for Tuesday morning for around Austin and into much of the Coastal Prairies. This is partly because of a more easterly wind that hasn't fully broken down the overrunning pattern and partly because western counties will be seeing the return of a shortwave ridge. Some residual showers are forecast for Wednesday, but we don't see that producing much QPF, and there could be a cap that suppresses this built up low level moisture. The warmer temperatures return Thursday after a near normal temperature day Wednesday.

Late week rain opportunities under a shallow but broad upper ridge will be in low confidence, but we at least expect the humidity to be there. By next weekend we could see a flatter zonal pattern that could lead to some more storms, possibly of the dry-line variety.

AVIATION

(06Z TAFS) Issued at 1245 AM CDT Sun Apr 19 2026

A line of showers and thunderstorms is moving east of I-35. There are thunderstorms in the San Antonio area, and those airports could have lightning for the next couple of hours. Storms have moved east of AUS, but they could still see some lightning for another hour or two. Ceilings are holding at VFR heights even in storms, and we expect VFR conditions overnight and through the day. Visibility may drop to MVFR with rain. Strong, gusty northerly winds will continue overnight. Winds will decrease after sunrise.

PRELIMINARY POINT TEMPS/POPS

Austin Camp Mabry 75 56 69 58 / 0 20 50 60 Austin Bergstrom Intl Airport 75 54 68 58 / 10 20 50 60 New Braunfels Muni Airport 73 54 67 57 / 20 40 70 60 Burnet Muni Airport 71 53 64 55 / 0 20 50 60 Del Rio Intl Airport 66 54 63 58 / 30 50 50 40 Georgetown Muni Airport 74 54 67 57 / 0 10 40 60 Hondo Muni Airport 68 53 62 57 / 20 50 80 60 San Marcos Muni Airport 73 54 68 57 / 10 30 60 60 La Grange - Fayette Regional 74 56 71 59 / 20 20 40 50 San Antonio Intl Airport 71 55 66 59 / 20 50 80 60 Stinson Muni Airport 70 56 66 59 / 30 50 80 60

EWX WATCHES/WARNINGS/ADVISORIES

None.