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Lake Umatilla Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Partly Cloudy | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C |
| POP: 20% | POP: 50% | POP: 40% | POP: 20% | POP: 50% | POP: 20% | POP: 50% | POP: 20% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 350 PM EDT Sun Aug 23 2026 
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Issued: 752 PM EDT Sun Aug 23 2026
Key Messages
Issued at 230 PM EDT Sun Aug 23 2026- Scattered to numerous showers and lightning storms are forecast this afternoon and evening, highest near and north of the I-4 corridor. Storm hazards include frequent lightning strikes, wind gusts up to 55 mph, and quick rainfall accumulations of 1-3" locally.
- Below normal rain and storm chances start off the work-week as high pressure lifts northward across the Florida peninsula, with a return of near normal rain and storm chances from Wednesday ...