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Shallow Lake Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY |
 |  | |  | | | | | |  | | |
| Chance of Rain | Rain and Snow | Rain and Snow | Chance of Snow | Snow and Rain | Snow and Rain | Rain and Snow | Rain and Snow | Rain and Snow | Mostly Clear | Mostly Clear | Sunny |
| Lo: 38°FLo: 3°C | Hi: 55°FHi: 13°C | Lo: 32°FLo: 0°C | Hi: 48°FHi: 9°C | Lo: 28°FLo: -2°C | Hi: 48°FHi: 9°C | Lo: 27°FLo: -3°C | Hi: 53°FHi: 12°C | Lo: 27°FLo: -3°C | Hi: 56°FHi: 13°C Lo: 28°FLo: -2°C | Hi: 56°FHi: 13°C Lo: 28°FLo: -2°C | Hi: 62°FHi: 17°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 122 PM MDT Fri Oct 09 2026 
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Issued: 1040 PM MDT Fri Oct 9 2026
Key Messages
- Flood Watch In Effect (SaturdayMonday): A Flood Watch covers most of eastern Idahoincluding Sun Valley east through the Magic Valley, Snake Plain, and Eastern/Southeastern Highlandsfor a multi-day rainfall event of 1.0 to 2.0 inches, with localized totals up to 3.0 inches possible near Island Park and into the eastern Highlands. NBM guidance shows an 80% to 100% probability of exceeding 1.0 inch of rainfall along/east of the I-15 corridor and the South Hills, with a 30% to 80% probab...