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First Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY |
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| Chance of Snow | Snow and Rain | Snow and Rain | Chance of T-Storm | Chance of Snow | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Partly Cloudy |
| Hi: 39°FHi: 4°C | Lo: 35°FLo: 2°C | Hi: 39°FHi: 4°C | Lo: 25°FLo: -4°C | Hi: 31°FHi: -1°C | Lo: 25°FLo: -4°C | Hi: 39°FHi: 4°C Lo: 25°FLo: -4°C | Hi: 39°FHi: 4°C Lo: 25°FLo: -4°C | Hi: 39°FHi: 4°C Lo: 25°FLo: -4°C | Lo: 25°FLo: -4°C | Hi: 35°FHi: 2°C |
| POP: 50% | POP: 100% | POP: 100% | POP: 100% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1243 AM MDT Sat Oct 31 2026 
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Issued: 617 AM MDT Sat Oct 31 2026
Key Messages
.KEY MESSAGES, Issued 1012 PM MDT Fri Oct 30 2026...- After a relative lull in precipitation on Saturday, an atmospheric river will interact with a strong cold front Sunday into Monday, resulting in widespread moderate to heavy precipitation across the region. This will increase the potential for flash flooding on Sunday across southern and eastern Utah.
- Accumulating mountain snow is expected Sunday night through early Monday as colder air spreads into the region. Local snowfall total...