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St. Marks School Weather Forecast
| THIS AFTERNOON | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT |
 |  | | | |  |  | | | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear |
| Hi: 99°FHi: 37°C | Lo: 79°FLo: 26°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C |
| POP: 40% | POP: 50% | POP: 40% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1113 AM CDT Wed Sep 02 2026 
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Issued: 521 AM CDT Wed Sep 2 2026
Key Messages
- A Flood Watch is in effect for portions of the Brazos Valley through 1 PM Thursday.
- Localized flash flooding will be possible south of I-20 and east of I-35 Wednesday into Thursday night.
- Elevated fire weather concerns will continue across much of the Big Country into the weekend.
Aviation
... (12Z TAFS) Issued at 511 AM CDT Wed Sep 2 2026
Isolated showers are expected to develop across much of North and Central Texas between 18Z and 02Z, but coverage is too low (10-20%) to include into...