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Harmon Reservoir Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY |
 |  |  |  | |  | | | | | | |
| Partly Cloudy | Snow Showers | Mostly Cloudy | Partly Sunny | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Snow Showers | Snow Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 30°FLo: -1°C | Hi: 45°FHi: 7°C | Lo: 26°FLo: -3°C | Hi: 46°FHi: 8°C | Lo: 30°FLo: -1°C | Hi: 45°FHi: 7°C Lo: 26°FLo: -3°C | Hi: 45°FHi: 7°C Lo: 26°FLo: -3°C | Lo: 30°FLo: -1°C | Hi: 49°FHi: 9°C | Hi: 46°FHi: 8°C Lo: 30°FLo: -1°C | Hi: 46°FHi: 8°C Lo: 30°FLo: -1°C | Hi: 46°FHi: 8°C Lo: 30°FLo: -1°C |
| POP: 20% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1017 PM PDT Tue Oct 27 2026 
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Issued: 1018 PM PDT Tue Oct 27 2026
Key Messages
- Mountain snow overnight, becoming light through the week. *Winter Weather Advisory Issued*
- Breezy winds today and Wednesday.
- Cooling, below normal temperatures through week.
Discussion
... Current radar and visible satellite imagery shows light returns along the Cascade and Blue Mountains under mostly cloudy skies. This is in response to an upper level shortwave passing through the area. This shortwave has produced continued light mountain rain and brief showers across the Columbia Bas...