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Trinity Lake Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Isolated Showers | Chance of T-Storm | Snow Showers | Snow Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Rain/Snow Showers | Snow Showers | Snow Showers |
| Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C | Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C | Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C | Lo: 41°FLo: 5°C | Hi: 41°FHi: 5°C | Lo: 35°FLo: 2°C | Hi: 35°FHi: 2°C | Lo: 31°FLo: -1°C | Hi: 41°FHi: 5°C |
| POP: 20% | POP: 20% | POP: 50% | POP: 60% | POP: 20% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 419 PM MDT Sun Oct 18 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 445 PM MDT Sun Oct 18 2026
Key Messages
- Isolated showers and warming temperatures to start the work week.
- Chances for widespread rainfall increase Wednesday - Friday bringing renewed chances for flooding and flash flooding.
Discussion
... Issued at 141 PM MDT Sun Oct 18 2026
BECOMING WARMER AND WETTER THROUGH WEDNESDAY:
With broad southwesterly flow in place, moisture advection will continue to result in increasing cloud cover and isolated showers through Tuesday. Modest warm air advection will also allow for more seasonable t...