Marine Weather and Tide Forecast for Castle Hills, TX

SHORT TERM
(Tonight through Friday night)
Issued at 118 PM CDT Thu Apr 24 2025

Key Messages:

- Scattered to numerous showers and storms this afternoon and early evening across portions of the northeast Hill Country into the Austin metro area

- There is a Level 1 of 5 risk for severe thunderstorms this afternoon and evening across Llano, Burnet, Williamson, Lee, Travis, and Val Verde Counties.

A complex of showers and thunderstorms across north-central Texas has produced an outflow boundary near a Brady to Lampasas to Waco line which is moving south. Differential heating along the expansive cloud shield just to the north and forcing from the outflow boundary as it makes it into the area should allow for development of showers and storms across Llano, Burnet, and Williamson counties over the next few hours, as indicated by several CAMs. This could continue southward into Lee, Bastrop, and Travis counties, including the Austin metro area, as well as west into the Hill Country late afternoon into the early evening hours. We have raised rain chances through these areas for the afternoon and early evening. In addition, we will be watching closely isolated coverage of storms this afternoon and evening across Mexico and the Trans Pecos as they move east. There is a low chance (20%) that these storms could impact the Rio Grande and southern Edwards Plateau before dissipating late this evening.

A few strong to severe storms are possible, and SPC has placed portions Llano, Burnet, Williamson, Lee, Travis, and Val Verde counties in a Level 1 of 5 risk for severe storms. Large hail and damaging wind gusts are the primary threats. Activity should gradually diminish through the mid and late evening hours with loss of heating.

Stratus is forecast to re-develop overnight, with isolated streamer showers Friday morning near the I-35 corridor. By late Friday afternoon and into the evening destabilization should allow for isolated deeper convection along and north of I-10, where a 20-30% chance for isolated showers and thunderstorms are forecast. There is also a very low chance (10%) for isolated thunderstorms in the higher terrain of Mexico and in the Trans Pecos to make it eastward into Val Verde County Friday evening before weakening.

LONG TERM
(Saturday through Thursday)
Issued at 118 PM CDT Thu Apr 24 2025

Key message:

- Very low chances of showers and storms Saturday through Monday, then increasing chances Tuesday through Thursday

Ridging briefly builds over South Central Texas this weekend before upper troughing moves into the western US breaking down this feature late Monday. Warm, humid and mainly dry conditions are expected this weekend with highs in the 80s or 90s across the area.
Precipitation this weekend will mainly stay on the periphery of the ridge just outside of our CWA That said, a few stray showers or thunderstorms may approach our far western/northern areas during this time as storms fire off the dryline in west Texas and move towards Val Verde County or the Hill Country. A pattern change comes Tuesday as the upper level trough and associated cold front approach Texas.
While details remain unclear for precipitation amounts and timing, chances increase late Tuesday through Thursday. It does look like the best chances for rain remain in the northern and eastern portions of the area at this time. Partly to mostly cloudy conditions with continued highs in the 80s and 90s is expected next week.

AVIATION
(18Z TAFS)
Issued at 1258 PM CDT Thu Apr 24 2025

Ceilings will continue to gradually become VFR through the afternoon hours. We are watching to the north a complex of SHRA/TSRA activity, which has produced an outflow boundary that is moving south. This will be the focus for convective development later this afternoon and into the early evening hours from AQA-AUS-GYB. We have included a TEMPO TSRA at AUS from 21-00Z. Isolated storms could produce large hail and wind gusts in excess of 50KT. Activity is forecast to gradually diminish after sunset. MVFR ceilings re-develop overnight, with some pockets of IFR ceilings Friday morning.

PRELIMINARY POINT TEMPS/POPS
Austin Camp Mabry 69 87 68 88 / 40 30 10 10 Austin Bergstrom Intl Airport 67 87 67 88 / 40 30 10 10 New Braunfels Muni Airport 69 88 68 89 / 20 30 0 10 Burnet Muni Airport 66 86 66 85 / 30 30 10 10 Del Rio Intl Airport 72 90 71 91 / 20 0 10 10 Georgetown Muni Airport 67 87 67 87 / 40 30 10 10 Hondo Muni Airport 69 86 68 88 / 20 20 0 10 San Marcos Muni Airport 68 87 67 87 / 30 30 0 10 La Grange - Fayette Regional 69 87 67 87 / 30 30 0 0 San Antonio Intl Airport 70 87 69 87 / 20 30 0 10 Stinson Muni Airport 72 88 71 90 / 20 20 0 10

EWX WATCHES/WARNINGS/ADVISORIES
None.