Marine Weather and Tide Forecast for Weir, TX
April 18, 2025 6:01 PM CDT (23:01 UTC) Change Location
 | Sunrise 6:57 AM Sunset 8:01 PM Moonrise 12:00 AM Moonset 9:29 AM |
7 Day Forecast for Marine Location Near Weir, TX
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Area Discussion for Austin/San Antonio, TX
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FXUS64 KEWX 181952 AFDEWX
Area Forecast Discussion National Weather Service Austin/San Antonio TX 252 PM CDT Fri Apr 18 2025
New SHORT TERM, LONG TERM
SHORT TERM
(Tonight through Saturday night)
Issued at 236 PM CDT Fri Apr 18 2025
- There is a Level 1 of 5 risk for Severe Thunderstorms tonight over the Southern Edwards Plateau.
- There is a Level 2 of 5 Risk for Severe Thunderstorms Saturday generally along and west of the I-35 Corridor.
An upper-level trough continues to slide southward into the Four Corners region this afternoon. The first of several shortwaves will eject out over west Texas later this afternoon, potentially sending the dryline eastward into the western part of our CWA With a rather stout cap in place, the threat for strong to severe storms remains low. However, this may be a case of low POPs but high severe potential given strong MLCAPE values of 2000-3000 J/kg, and 0-6km bulk shear of 50-60 kts. If storms do form they could become severe rather quickly. The SPC day 1 outlook includes a Marginal Risk (1 of 5) for a small sliver of the Southern Edwards Plateau. The severe threat increases on Saturday as the upper level trough pivots further east and another shortwave lifts from southwest to northeast Saturday afternoon over west Texas. SPC currently has areas west of I-35, over the Hill Country, Edwards Plateau, and Rio Grande Plains in a Slight risk (2 of 5) for severe storms. The biggest threat appears to be either hail, due to extreme CAPE and steep mid-level lapse rates, or wind due to strong winds aloft getting pulled down to the surface in some of the stronger storms. The best timing for strong to severe storms looks to be from late afternoon into the overnight period. Saturday will start quite warm with lows from the middle 60s to lower 70s. Cloudy skies and possible rain will keep highs Saturday about five degrees cooler than Friday. A weak cold front will bring some cooler air Sunday morning, and lows will be 5- 10 degrees cooler than Saturday.
LONG TERM
(Sunday through Friday)
Issued at 236 PM CDT Fri Apr 18 2025
- A level 1 and 2 of 5 risk for severe thunderstorms early Easter morning with large hail and damaging winds as the primary severe weather concerns.
- Rain chances continue for the middle portion of the upcoming week.
A line of showers and thunderstorms is expected to be near the I-35 corridor around sunrise Easter Sunday. The latest guidance from the SPC along with hi-res model guidance continues to show a risk for severe storms across the Hill Country (Level 2 of 5) and I-35 corridor (Level 1 of 5) early Sunday. Large hail and damaging winds are the main severe weather concerns. The latest round of model guidance continues to show some consistency with the line of storms expected to weaken while moving out of the Hill Country and into the I-35 corridor Sunday morning. Most of the shower and thunderstorm activity is expected to gradually move eastward into the coastal plains region during the afternoon hours as drier air behind a cold front moves in from the northwest. High temperatures will be a little cooler on Sunday, with upper 70s in the Hill Country to the mid 80s to near 90 along the Rio Grande.
The above mentioned frontal boundary may linger across the coastal plains on Monday and we will keep a low chance for showers and storms in the forecast across this region. The front quickly shifts northward as a warm front Monday night leading to a quick return of low-level moisture across all areas. The medium range models continue to show a fairly strong shortwave trough embedded in the southwest flow aloft moving into the region late Tuesday into early Wednesday.
This period will be favored for scattered shower and thunderstorm development and with precipitable water values generally at or above 1.5" (above 90th percentile at DRT per SPC sounding climo) some areas may receive some moderate to heavy rainfall. Another shortwave trough moves in from the west on Thursday, leading to another chance for scattered shower and thunderstorm development. As the pattern evolves next week, we will refine and narrow the window for precipitation chances. As mentioned above, late Tuesday into early Wednesday are favored along with Thursday afternoon and evening.
AVIATION
(18Z TAFS)
Issued at 1235 PM CDT Fri Apr 18 2025
Ceilings have lifted at all terminals. Winds from the south to southeast will be 15-20 kts with gusts up to 30 kts this afternoon and evening. Low ceilings will redevelop overnight in the Austin and San Antonio areas. There will be chances for showers and thunderstorms starting at DRT around 06z. Chances for convection won't make to San Antonio and Austin until Saturday afternoon.
PRELIMINARY POINT TEMPS/POPS
Austin Camp Mabry 70 85 65 80 / 10 30 20 70 Austin Bergstrom Intl Airport 69 85 65 80 / 10 30 20 70 New Braunfels Muni Airport 69 87 67 83 / 10 40 20 70 Burnet Muni Airport 68 82 62 80 / 30 50 60 50 Del Rio Intl Airport 71 90 64 88 / 60 20 80 10 Georgetown Muni Airport 70 85 62 79 / 20 30 30 70 Hondo Muni Airport 68 86 62 83 / 30 30 60 40 San Marcos Muni Airport 68 85 65 81 / 10 30 20 70 La Grange - Fayette Regional 69 86 70 83 / 0 20 10 60 San Antonio Intl Airport 70 85 67 82 / 10 40 40 60 Stinson Muni Airport 70 87 68 82 / 10 30 30 60
EWX WATCHES/WARNINGS/ADVISORIES
None.
Area Forecast Discussion National Weather Service Austin/San Antonio TX 252 PM CDT Fri Apr 18 2025
New SHORT TERM, LONG TERM
SHORT TERM
(Tonight through Saturday night)
Issued at 236 PM CDT Fri Apr 18 2025
- There is a Level 1 of 5 risk for Severe Thunderstorms tonight over the Southern Edwards Plateau.
- There is a Level 2 of 5 Risk for Severe Thunderstorms Saturday generally along and west of the I-35 Corridor.
An upper-level trough continues to slide southward into the Four Corners region this afternoon. The first of several shortwaves will eject out over west Texas later this afternoon, potentially sending the dryline eastward into the western part of our CWA With a rather stout cap in place, the threat for strong to severe storms remains low. However, this may be a case of low POPs but high severe potential given strong MLCAPE values of 2000-3000 J/kg, and 0-6km bulk shear of 50-60 kts. If storms do form they could become severe rather quickly. The SPC day 1 outlook includes a Marginal Risk (1 of 5) for a small sliver of the Southern Edwards Plateau. The severe threat increases on Saturday as the upper level trough pivots further east and another shortwave lifts from southwest to northeast Saturday afternoon over west Texas. SPC currently has areas west of I-35, over the Hill Country, Edwards Plateau, and Rio Grande Plains in a Slight risk (2 of 5) for severe storms. The biggest threat appears to be either hail, due to extreme CAPE and steep mid-level lapse rates, or wind due to strong winds aloft getting pulled down to the surface in some of the stronger storms. The best timing for strong to severe storms looks to be from late afternoon into the overnight period. Saturday will start quite warm with lows from the middle 60s to lower 70s. Cloudy skies and possible rain will keep highs Saturday about five degrees cooler than Friday. A weak cold front will bring some cooler air Sunday morning, and lows will be 5- 10 degrees cooler than Saturday.
LONG TERM
(Sunday through Friday)
Issued at 236 PM CDT Fri Apr 18 2025
- A level 1 and 2 of 5 risk for severe thunderstorms early Easter morning with large hail and damaging winds as the primary severe weather concerns.
- Rain chances continue for the middle portion of the upcoming week.
A line of showers and thunderstorms is expected to be near the I-35 corridor around sunrise Easter Sunday. The latest guidance from the SPC along with hi-res model guidance continues to show a risk for severe storms across the Hill Country (Level 2 of 5) and I-35 corridor (Level 1 of 5) early Sunday. Large hail and damaging winds are the main severe weather concerns. The latest round of model guidance continues to show some consistency with the line of storms expected to weaken while moving out of the Hill Country and into the I-35 corridor Sunday morning. Most of the shower and thunderstorm activity is expected to gradually move eastward into the coastal plains region during the afternoon hours as drier air behind a cold front moves in from the northwest. High temperatures will be a little cooler on Sunday, with upper 70s in the Hill Country to the mid 80s to near 90 along the Rio Grande.
The above mentioned frontal boundary may linger across the coastal plains on Monday and we will keep a low chance for showers and storms in the forecast across this region. The front quickly shifts northward as a warm front Monday night leading to a quick return of low-level moisture across all areas. The medium range models continue to show a fairly strong shortwave trough embedded in the southwest flow aloft moving into the region late Tuesday into early Wednesday.
This period will be favored for scattered shower and thunderstorm development and with precipitable water values generally at or above 1.5" (above 90th percentile at DRT per SPC sounding climo) some areas may receive some moderate to heavy rainfall. Another shortwave trough moves in from the west on Thursday, leading to another chance for scattered shower and thunderstorm development. As the pattern evolves next week, we will refine and narrow the window for precipitation chances. As mentioned above, late Tuesday into early Wednesday are favored along with Thursday afternoon and evening.
AVIATION
(18Z TAFS)
Issued at 1235 PM CDT Fri Apr 18 2025
Ceilings have lifted at all terminals. Winds from the south to southeast will be 15-20 kts with gusts up to 30 kts this afternoon and evening. Low ceilings will redevelop overnight in the Austin and San Antonio areas. There will be chances for showers and thunderstorms starting at DRT around 06z. Chances for convection won't make to San Antonio and Austin until Saturday afternoon.
PRELIMINARY POINT TEMPS/POPS
Austin Camp Mabry 70 85 65 80 / 10 30 20 70 Austin Bergstrom Intl Airport 69 85 65 80 / 10 30 20 70 New Braunfels Muni Airport 69 87 67 83 / 10 40 20 70 Burnet Muni Airport 68 82 62 80 / 30 50 60 50 Del Rio Intl Airport 71 90 64 88 / 60 20 80 10 Georgetown Muni Airport 70 85 62 79 / 20 30 30 70 Hondo Muni Airport 68 86 62 83 / 30 30 60 40 San Marcos Muni Airport 68 85 65 81 / 10 30 20 70 La Grange - Fayette Regional 69 86 70 83 / 0 20 10 60 San Antonio Intl Airport 70 85 67 82 / 10 40 40 60 Stinson Muni Airport 70 87 68 82 / 10 30 30 60
EWX WATCHES/WARNINGS/ADVISORIES
None.
Link to 1 hour of 5 minute data for KGTU
Terminal Aerodrome Forecast (TAF) for KGTU
Wind History Graph: GTU
(wind in knots)
GEOS Local Image of southern planes -- texas
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